1
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Yang H, Zeng Y, Song X, Che L, Jiang ZT, Lu G, Xia Y. Rhodium-Catalyzed Enantio- and Regioselective Allylation of Indoles with gem-Difluorinated Cyclopropanes. Angew Chem Int Ed Engl 2024; 63:e202403602. [PMID: 38515395 DOI: 10.1002/anie.202403602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 03/23/2024]
Abstract
The use of gem-difluorinated cyclopropanes (gem-DFCPs) as fluoroallyl surrogates under transition-metal catalysis has drawn considerable attention recently but such reactions are restricted to producing achiral or racemic mono-fluoroalkenes. Herein, we report the first enantioselective allylation of indoles under rhodium catalysis with gem-DFCPs. This reaction shows exceptional branched regioselectivity towards rhodium catalysis with gem-DFCPs, which provides an efficient route to enantioenriched fluoroallylated indoles with wide substrate scope and good functional group tolerance.
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Affiliation(s)
- Hui Yang
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Xiangyu Song
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Lin Che
- Linyi University, School of Chemistry and Chemical Engineering, Linyi, 276000, China
| | - Zhong-Tao Jiang
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Gang Lu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
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2
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von Münchow T, Liu YR, Parmar R, Peters SE, Trienes S, Ackermann L. Cobaltaelectro-Catalyzed C-H Activation for Central and Axial Double Enantio-Induction. Angew Chem Int Ed Engl 2024:e202405423. [PMID: 38758011 DOI: 10.1002/anie.202405423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/22/2024] [Accepted: 05/03/2024] [Indexed: 05/18/2024]
Abstract
In recent years, enantioselective electrocatalysis has surfaced as an increasingly-effective platform for sustainable molecular synthesis. Despite indisputable progress, strategies that allow the control of two distinct stereogenic elements with high selectivity remain elusive. In contrast, we, herein, describe electrochemical cobalt-catalyzed C-H activations that enable the installation of chiral stereogenic centers along with a chiral axis with high levels of enantio- and diastereoselectivities. The developed electrocatalysis strategy allowed for C-H/N-H activations/annulations with cyclic and non-cyclic alkenes providing expedient access to various central as well as atropo-chiral dihydroisoquinolinones paired to the valuable hydrogen evolution reaction. Studies on the atropo-stability of the obtained compounds demonstrated that the exceedingly mild conditions ensured by the electrocatalytic process were key for the achieved high stereoselectivities.
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Affiliation(s)
- Tristan von Münchow
- Georg-August-Universität Göttingen, Instiut für Organische und Biomolekulare Chemie, GERMANY
| | - Yi-Ru Liu
- Georg-August-Universität Göttingen, Instiut für Organische und Biomolekulare Chemie, GERMANY
| | - Rahul Parmar
- Georg-August-Universität Göttingen, Institut für Organische und Biomolekulare Chemie, GERMANY
| | - Sven Erik Peters
- Georg-August-Universität Göttingen, Institut für Organische und Biomolekulare Chemie, GERMANY
| | - Sven Trienes
- Georg-August-Universität Göttingen, Institut für Organische und Biomolekulare Chemie, GERMANY
| | - Lutz Ackermann
- Georg-August-Universitaet Goettingen, Institut fuer Organische und Biomolekulare Chemie, Tammannstr. 2, 37077, Goettingen, GERMANY
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3
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Shen X, Zhang Y, Xu J, Yu X, Bai W, Huang X, Lei H. Central Chirality and Axial Chirality Recognition of the Enantioselective Antibodies to Herbicide Metolachlor. J Agric Food Chem 2024; 72:10055-10064. [PMID: 38634336 DOI: 10.1021/acs.jafc.4c00860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Enantioselective antibodies have emerged as efficient tools in the field of chiral chemical detection and separation. However, it is complicated to obtain a highly stereoselective antibody due to the unclear recognition mechanism. In this study, the hapten of metolachlor was synthesized and enantio-separated. The absolute configuration of the four haptens obtained was identified by the computed and experimental electronic circular dichroism comparison. Five polyclonal antibodies against the Rac-metolachlor and its enantiomers were generated by immunization. The cross-activity of all the 5 antibodies with 44 structural analogues, including metolachlor enantiomers, was tested. It demonstrated that antibodies have higher specificity to recognize central chirality than axial chirality. Especially, αRR-MET-Ab exhibited excellent specificity and stereoselectivity. Accordingly, 3D-QSAR models were constructed and revealed that paired stereoisomers exhibited opposite interactions with the antibodies. It is the first time that the antibodies against four stereoisomers were prepared and analyzed, which will be conducive to the rational design of the stereoselective antibodies.
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Affiliation(s)
- Xing Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Yan Zhang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - JingJing Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - XiaoTing Yu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - WenMing Bai
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Xinan Huang
- Institute of Tropical Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510400, China
| | - HongTao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
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4
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Yamazaki Y, Hitomi T, Homma C, Rungreungthanapol T, Tanaka M, Yamada K, Hamasaki H, Sugizaki Y, Isobayashi A, Tomizawa H, Okochi M, Hayamizu Y. Enantioselective Detection of Gaseous Odorants with Peptide-Graphene Sensors Operating in Humid Environments. ACS Appl Mater Interfaces 2024; 16:18564-18573. [PMID: 38567738 DOI: 10.1021/acsami.4c01177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Replicating the sense of smell presents an ongoing challenge in the development of biomimetic devices. Olfactory receptors exhibit remarkable discriminatory abilities, including the enantioselective detection of individual odorant molecules. Graphene has emerged as a promising material for biomimetic electronic devices due to its unique electrical properties and exceptional sensitivity. However, the efficient detection of nonpolar odor molecules using transistor-based graphene sensors in a gas phase in environmental conditions remains challenging due to high sensitivity to water vapor. This limitation has impeded the practical development of gas-phase graphene odor sensors capable of selective detection, particularly in humid environments. In this study, we address this challenge by introducing peptide-functionalized graphene sensors that effectively mitigate undesired responses to changes in humidity. Additionally, we demonstrate the significant role of humidity in facilitating the selective detection of odorant molecules by the peptides. These peptides, designed to mimic a fruit fly olfactory receptor, spontaneously assemble into a monomolecular layer on graphene, enabling precise and specific odorant detection. The developed sensors exhibit notable enantioselectivity, achieving a remarkable 35-fold signal contrast between d- and l-limonene. Furthermore, these sensors display distinct responses to various other biogenic volatile organic compounds, demonstrating their versatility as robust tools for odor detection. By acting as both a bioprobe and an electrical signal amplifier, the peptide layer represents a novel and effective strategy to achieve selective odorant detection under normal atmospheric conditions using graphene sensors. This study offers valuable insights into the development of practical odor-sensing technologies with potential applications in diverse fields.
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Affiliation(s)
- Yui Yamazaki
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
| | - Tatsuru Hitomi
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
| | - Chishu Homma
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
| | - Tharatorn Rungreungthanapol
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
| | - Masayoshi Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
| | - Kou Yamada
- Corporate Research & Development Center, Toshiba Corporation, 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki 212-8582, Japan
| | - Hiroshi Hamasaki
- Corporate Research & Development Center, Toshiba Corporation, 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki 212-8582, Japan
| | - Yoshiaki Sugizaki
- Corporate Research & Development Center, Toshiba Corporation, 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki 212-8582, Japan
| | - Atsunobu Isobayashi
- Corporate Research & Development Center, Toshiba Corporation, 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki 212-8582, Japan
| | - Hideyuki Tomizawa
- Corporate Research & Development Center, Toshiba Corporation, 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki 212-8582, Japan
| | - Mina Okochi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
| | - Yuhei Hayamizu
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguroku, Tokyo 152-8550, Japan
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5
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Zhang M, Zhang Y, Du X, Ma Y, Huang H, Liao F, Fan X, Wang J, Lin H, Shao M, Liu Y, Li Y, Kang Z. Enantioselective and Band-Gap Modulation in Photocatalysis of Metal-Free Chiral Carbon Dots. ACS Appl Mater Interfaces 2024; 16:19379-19390. [PMID: 38568698 DOI: 10.1021/acsami.4c02003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Photodriven chiral catalysis is the combination of photocatalysis and chiral catalysis and is considered one of the cleanest and most efficient methods for the synthesis of chiral compounds or drugs. Furthermore, due to the potential metal contamination associated with most metal-based catalysts, metal-free chiral photocatalysts are ideal candidates. In this work, we demonstrate that metal-free chiral carbon dots (CDs) exhibit size-dependent enantioselective photocatalytic activity. Using serine as the raw material, chiral CDs with well-defined structures and average sizes of 2.22, 3.01, 3.70, 4.77, and 7.21 nm were synthesized using the electrochemical method. These chiral CDs possess size-dependent band gaps and exhibit photoresponsive enantioselective catalytic activity toward the oxidation of dihydroxyphenylalanine (DOPA). Under light-assisted conditions, chiral CDs (L72, 500 μg/mL) exhibit high selectivity (selectivity factor: 2.07) and maintain a certain level of catalytic activity (1.34 μM/min) even at a low temperature of 5 °C. The high catalytic activity of the chiral CDs arises from their photoelectrons reducing O2 to generate O2-, as the active oxygen species for DOPA oxidation. The high enantioselectivity of the chiral CDs is attributed to their differential adsorption capabilities toward DOPA enantiomers. This study provides a new approach for designing metal-free chiral photocatalysts with high enantioselectivity.
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Affiliation(s)
- Mengling Zhang
- Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa, Macao 999078, China
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yan Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Xin Du
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yurong Ma
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Hui Huang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Fan Liao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Xing Fan
- Research Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Jianhua Wang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
| | - Haiping Lin
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
| | - Mingwang Shao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yang Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Youyong Li
- Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa, Macao 999078, China
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Zhenhui Kang
- Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa, Macao 999078, China
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
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6
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Bai Y, Xian A, Yang X, Zhou M, Zhao X, Zhao L. Mechanistic study of the Ni-catalyzed hydroalkylation of 1,3-dienes: The origins of regio- and enantioselectivities and a further rational design. J Comput Chem 2024; 45:610-621. [PMID: 38058240 DOI: 10.1002/jcc.27277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/07/2023] [Accepted: 11/11/2023] [Indexed: 12/08/2023]
Abstract
The development of the catalytic regio- and enantioselective hydrofunctionalization of 1,3-dienes remains a challenge and requires deep insight into the reaction mechanisms. We herein thoroughly studied the reaction mechanism of the Ni-catalyzed hydroalkylation of 1,3-dienes with ketones by density functional theory (DFT) calculations. It reveals that the reaction is initiated by stepwise oxidative addition of EtO-H followed by 1,3-diene migratory insertion to generate the alkylnickel(II) intermediate, rather than the experimentally proposed ligand-to-ligand hydrogen transfer (LLHT) mechanism. In addition, we rationalized the role of t BuOK in the subsequent addition of enolate of ketone and transmetalation process. Based on the whole catalysis, the CC reductive elimination step, turns out to be the rate- and enantioselectivity-determining step. Furthermore, we disclosed the origins of the regio- and enantioselectivity of the product, and found that the 1,2-selectivity lies in the combination effects of the ligand-substrate electrostatic interactions, orbital interactions and Pauli repulsions, while the enantioselectivity mainly arises from substrate-ligand steric repulsions. Based on mechanistic study, new biaryl bisphosphine ligands affording higher enantioselectivity were designed, which will help to improve current catalytic systems and develop new transition-metal-catalyzed hydroalkylations.
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Affiliation(s)
- Yuna Bai
- School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
| | - Anmei Xian
- School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
| | - Xing Yang
- School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
| | - Ming Zhou
- School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
| | - Xuefei Zhao
- School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
| | - Lili Zhao
- School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
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7
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Chen Y, Cao Z, Feng T, Zhang X, Li Z, Dong X, Huang S, Liu Y, Cao X, Sue ACH, Peng C, Lin X, Wang L, Li H. Enantioselective Self-Assembly of a Homochiral Tetrahedral Cage Comprising Only Achiral Precursors. Angew Chem Int Ed Engl 2024; 63:e202400467. [PMID: 38273162 DOI: 10.1002/anie.202400467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/25/2024] [Accepted: 01/25/2024] [Indexed: 01/27/2024]
Abstract
How Nature synthesizes enantiomerically pure substances from achiral or racemic resources remains a mystery. In this study, we aimed to emulate this natural phenomenon by constructing chiral tetrahedral cages through self-assembly, achieved by condensing two achiral compounds-a trisamine and a trisaldehyde. The occurrence of intercomponent CH⋅⋅⋅π interactions among the phenyl building blocks within the cage frameworks results in twisted conformations, imparting planar chirality to the tetrahedrons. In instances where the trisaldehyde precursor features electron-withdrawing ester side chains, we observed that the intermolecular CH⋅⋅⋅π forces are strong enough to prevent racemization. To attain enantioselective self-assembly, a chiral amine was introduced during the imine formation process. The addition of three equivalents of chiral amino mediator to one equivalent of the achiral trisaldehyde precursor formed a trisimino intermediate. This chiral compound was subsequently combined with the achiral trisamino precursor, leading to an imine exchange reaction that releasing the chiral amino mediator and formation of the tetrahedral cage with an enantiomeric excess (ee) of up to 75 %, exclusively composed of achiral building blocks. This experimental observation aligns with theoretical calculations based on the free energies of related cage structures. Moreover, since the chiral amine was not consumed during the imine exchange cycle, it enabled the enantioselective self-assembly of the tetrahedral cage for multiple cycles when new batches of the achiral trisaldehyde and trisamino precursors were successively added.
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Affiliation(s)
- Yixin Chen
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Ze Cao
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Tinglong Feng
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- Key Laboratory of Excited-State Materials of Zhejiang Province, Hangzhou, 310058, China
| | - Xiaobo Zhang
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Zhaoyong Li
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- Key Laboratory of Excited-State Materials of Zhejiang Province, Hangzhou, 310058, China
| | - Xue Dong
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Shaoying Huang
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 310027, China
| | - Yingchun Liu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Xiaoyu Cao
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Andrew C-H Sue
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chuanhui Peng
- The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Xufeng Lin
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Linjun Wang
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- Key Laboratory of Excited-State Materials of Zhejiang Province, Hangzhou, 310058, China
| | - Hao Li
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 310027, China
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8
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Cheng AC, Pin C, Sunaba Y, Sugiyama T, Sasaki K. Nanoscale Helical Optical Force for Determining Crystal Chirality. Small 2024:e2312174. [PMID: 38586919 DOI: 10.1002/smll.202312174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/14/2024] [Indexed: 04/09/2024]
Abstract
The deterministic control of material chirality has been a sought-after goal. As light possesses intrinsic chirality, light-matter interactions offer promising avenues for achieving non-contact, enantioselective optical induction, assembly, or sorting of chiral entities. However, experimental validations are confined to the microscale due to the limited strength of asymmetrical interactions within sub-diffraction limit ranges. In this study, a novel approach is presented to facilitate chirality modulation through chiral crystallization using a helical optical force field originating from localized nanogap surface plasmon resonance. The force field emerges near a gold trimer nanogap and is propelled by linear and angular momentum transfer from the incident light to the resonant nanogap plasmon. By employing Gaussian and Laguerre-Gaussian incident laser beams, notable enantioselectivity is achieved through low-power plasmon-induced chiral crystallization of an organic compound-ethylenediamine sulfate. The findings provide new insights into chirality transmission orchestrated by the exchange of linear and angular momentum between light and nanomaterials.
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Affiliation(s)
- An-Chieh Cheng
- Research Institute for Electronic Science, Hokkaido University, Sapporo, 060-0812, Japan
| | - Christophe Pin
- Research Institute for Electronic Science, Hokkaido University, Sapporo, 060-0812, Japan
| | - Yuji Sunaba
- Research Institute for Electronic Science, Hokkaido University, Sapporo, 060-0812, Japan
| | - Teruki Sugiyama
- Department of Applied Chemistry and Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, 1001 University Rd., Hsinchu, 300093, Taiwan
- Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara, 630-0192, Japan
| | - Keiji Sasaki
- Research Institute for Electronic Science, Hokkaido University, Sapporo, 060-0812, Japan
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9
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Zhou G, Zhou T, Jiang AL, Qian PF, Li JY, Jiang BY, Chen ZJ, Shi BF. Electrooxidative Rhodium(III)/Chiral Carboxylic Acid-Catalyzed Enantioselective C-H Annulation of Sulfoximines with Alkynes. Angew Chem Int Ed Engl 2024; 63:e202319871. [PMID: 38289019 DOI: 10.1002/anie.202319871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Indexed: 02/21/2024]
Abstract
The combination of achiral Cp*Rh(III) with chiral carboxylic acids (CCAs) represents an efficient catalytic system in transition metal-catalyzed enantioselective C-H activation. However, this hybrid catalysis is limited to redox-neutral C-H activation reactions and the adopt to oxidative enantioselective C-H activation remains elusive and pose a significant challenge. Herein, we describe the development of an electrochemical Cp*Rh(III)-catalyzed enantioselective C-H annulation of sulfoximines with alkynes enabled by chiral carboxylic acid (CCA) in an operationally friendly undivided cell at room temperature. A broad range of enantioenriched 1,2-benzothiazines are obtained in high yields with excellent enantioselectivities (up to 99 % yield and 98 : 2 er). The practicality of this method is demonstrated by scale-up reaction in a batch reactor with external circulation. A crucial chiral Cp*Rh(III) intermediate is isolated, characterized, and transformed, providing rational support for a Rh(III)/Rh(I) electrocatalytic cycle.
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Affiliation(s)
- Gang Zhou
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Tao Zhou
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, 311121, Hangzhou, Zhejiang, China
| | - Ao-Lian Jiang
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Pu-Fan Qian
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Jun-Yi Li
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Bo-Yang Jiang
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Zi-Jia Chen
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Bing-Feng Shi
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, 311121, Hangzhou, Zhejiang, China
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 314001, Jiaxing, Zhejiang, China
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10
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Wang J, Guo C, Liu Y, Ji Y, Jia H, Li H. Enantioselective Synthesis of the 1,3-Dienyl-5-Alkyl-6-Oxy Motif: Method Development and Total Synthesis. Angew Chem Int Ed Engl 2024; 63:e202400478. [PMID: 38270494 DOI: 10.1002/anie.202400478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 01/26/2024]
Abstract
The 1,3-dienyl-5-alkyl-6-oxy motif is widely found in various types of bioactive natural products. However, present synthesis is mainly non-asymmetric which relied upon different olefination or transition metal-catalyzed cross-coupling reactions using enantioenriched precursors. Herein, based upon a newly developed enantioselective α-alkylation of conjugated polyenoic acids, a variety of 1,3-dienyl-5-alkyl-6-oxy motif (with E-configured internal olefin) was generated as the corresponding α-adducts in a highly enantioselective and diastereoselective manner. Utilizing 1,3-dienyl-5-alkyl-6-oxy motif as key intermediates, we further demonstrated their synthetic potential by expedient total syntheses of three types of natural products (glutarimide antibiotics, α-pyrone polyketides and Lupin alkaloids) within 4-7 steps.
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Affiliation(s)
- Jie Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yaqian Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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11
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Zeng XW, Lin JN, Shu W. Hydrogen Source Tuned Regiodivergent Asymmetric Hydroalkylations of 2-Substituted 1,3-Dienes with Aldehydes by Cobalt-Catalysis. Angew Chem Int Ed Engl 2024:e202403073. [PMID: 38567830 DOI: 10.1002/anie.202403073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Indexed: 05/03/2024]
Abstract
Catalytic methods allowing for the reliable prediction and control of diverse regioselectivity along with the control of enantioselectivity to access different regio- and enantiomers by switching the least reaction parameters are one of the most attractive ways in organic synthesis, which provide access to diverse enantioenriched architectures from identical starting materials. Herein, a Co-catalyzed regiodivergent and enantioselective reductive hydroalkylation of 1,3-dienes with aldehydes has been achieved, furnishing different enantioenriched homoallylic alcohol architectures in good levels of enantioselectivity. The reaction features the switch of regioselectivity tuned by the selection of proton source. The use of an acid as proton source provided asymmetric 1,2-hydroalkylation products under reductive conditions, yet asymmetric 4,3-hydroalkylation products were obtained with silane as hydride source. This catalytic protocol allows for the access of homoallylic alcohols with two continuous saturated carbon centers in good levels of regio-, diastereo-, and enantioselectivity.
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Affiliation(s)
- Xian-Wang Zeng
- Department of Chemistry, Guangming Advanced Research Institute and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Jia-Ni Lin
- Department of Chemistry, Guangming Advanced Research Institute and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Wei Shu
- Department of Chemistry, Guangming Advanced Research Institute and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
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12
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Taura D, Minami A, Mamiya F, Ousaka N, Itami K, Yashima E. Separation of enantiomers of chiral fullerene derivatives through enantioselective encapsulation within an adaptable helical cavity of syndiotactic poly(methyl methacrylate) with helicity memory. Chirality 2024; 36:e23663. [PMID: 38561600 DOI: 10.1002/chir.23663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/20/2024] [Accepted: 03/02/2024] [Indexed: 04/04/2024]
Abstract
Optically active left (M)- and right (P)-handed helical syndiotactic poly(methyl methacrylate)s (M- and P-st-PMMAs) with a helicity memory enantioselectively encapsulated the racemic C60 derivatives, such as 3,4-fulleroproline tert-butyl ester (rac-1) and tetraallylated C60 (rac-2), as well as the C60-bound racemic 310-helical peptides (rac-3) within their helical cavities to form peapod-like inclusion complexes and a unique "helix-in-helix" superstructure, respectively. The enantiomeric excess (ee) and separation factor (enantioselectivity) (α) of the analyte 1 (ee = 23%-25% and α = 2.35-2.50) encapsulated within the helical cavities of the M- and P-st-PMMAs were higher than those of the analytes 2 and 3 (ee = 4.3%-6.0% and α = 1.28-1.50). The optically pure (S)- and (R)-1 were found to more efficiently induce an excess one-handed helical conformation in the st-PMMA backbone than the optically pure (S)- and (R)-1-phenylethylamine, resulting in intense mirror-image vibrational circular dichroism (VCD) spectra in the PMMA IR regions. The excess one-handed helices induced in the st-PMMAs complexed with (S)- and (R)-1 were memorized after replacement with the achiral C60, and the complexes exhibited induced electric CDs in the achiral C60 chromophore regions.
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Affiliation(s)
- Daisuke Taura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Japan
- Department of Applied Chemistry, Faculty of Science and Technology, Meijo University, Nagoya, Japan
| | - Akiko Minami
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Fumihiko Mamiya
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Naoki Ousaka
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Japan
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa, Japan
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Japan
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13
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Li S, Wang F, Xing X, Yue X, Sun S, Lin H, Xu C. Activation-Induced Senescent Cell Death based on Chiral CoHAu Nanoassemblies with Enantioselective Cascade-Catalytic Ability. Adv Healthc Mater 2024; 13:e2303476. [PMID: 38161211 DOI: 10.1002/adhm.202303476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/15/2023] [Indexed: 01/03/2024]
Abstract
Chirality is common in nature, which determines the high enantioselectivity of living systems. Selecting suitable chiral configurations is of great meaning for nanostructures to function better in biological systems. In this study, chiral Co3O4-H2TPPS-Au (CoHAu) nanoassemblies are constructed to accelerate the production ∙OH by consuming D-glucose (D-Glu, widely spread in nature) based on their outstanding enantioselective cascade-catalytic abilities. In particular, D-CoHAu nanoassemblies are more effective in the catalytic conversion of D-Glu than L-CoHAu nanoassemblies. This phenomenon is due to the stronger binding affinity of D-CoHAu nanoassemblies indicated by the lower Km value. Moreover, D-CoHAu nanoassemblies display excellent consumption-ability of D-Glu and production of ∙OH in living cells, which can eliminate senescent cells effectively based on their intracellular enantioselective cascade-catalysis. This research establishes the foundation for bio-mimicking nanostructures with unique functionalities to regulate abnormal biological activities better.
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Affiliation(s)
- Si Li
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China
- State Key Lab of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection School of Food Science and Technology, Jiangnan University, Wuxi, 214122, P. R. China
| | - Fang Wang
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Xinhe Xing
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Xiaoyong Yue
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Shan Sun
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Hengwei Lin
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection School of Food Science and Technology, Jiangnan University, Wuxi, 214122, P. R. China
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14
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Yan P, Stegbauer S, Wu Q, Kolodzeiski E, Stein CJ, Lu P, Bach T. Enantioselective Intramolecular ortho Photocycloaddition Reactions of 2-Acetonaphthones. Angew Chem Int Ed Engl 2024; 63:e202318126. [PMID: 38275271 DOI: 10.1002/anie.202318126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 01/27/2024]
Abstract
2-Acetonaphthones, which bear an alkenyl group tethered to its C1 carbon atom via an oxygen atom, were found to undergo an enantioselective intramolecular ortho photocycloaddition reaction. A chiral oxazaborolidine Lewis acid leads to a bathochromic absorption shift of the substrate and enables an efficient enantioface differentiation. Visible light irradiation (λ=450 nm) triggers the reaction which is tolerant of various groups at almost any position except carbon atom C8 (16 examples, 53-99 % yield, 80-97 % ee). Consecutive reactions were explored including a sensitized rearrangement to tetrahydrobiphenylenes, which occurred with full retention of configuration. Evidence was collected that the catalytic photocycloaddition occurs via triplet intermediates, and the binding mode of the acetonaphthone to the chiral Lewis acid was elucidated by DFT calculations.
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Affiliation(s)
- Peng Yan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Simone Stegbauer
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Qinqin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Elena Kolodzeiski
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Christopher J Stein
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
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15
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Wang R, Zhang L, Luo S. Aerobic Asymmetric Allylic C-H Alkylation by Synergistic Chiral Primary Amine-Palladium-Hydroquinone Catalysis. Chemistry 2024; 30:e202304316. [PMID: 38179799 DOI: 10.1002/chem.202304316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 01/03/2024] [Indexed: 01/06/2024]
Abstract
A synergistic chiral primary amine/palladium /p-hydroquinone catalysis was developed to facilitate oxidative asymmetric allylic C-H alkylation under aerobic conditions. The ternary synergistic catalysis enables a facile allylic C-H activation and alkylation with oxygen so that stoichiometric utilization of benzoquinone can be avoided. The identified optimal catalytic system allows for terminal addition to allyl arenes with α-branched β-ketocarbonyls to afford allylic adducts bearing all-carbon quaternary centers with high regio- and enantioselectivity. This work provides new insights for further studies on the aerobically oxidative C-H alkylation reaction.
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Affiliation(s)
- Rui Wang
- Center of Basic Molecular Sciences (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Long Zhang
- Center of Basic Molecular Sciences (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Sanzhong Luo
- Center of Basic Molecular Sciences (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
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16
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Erenburg N, Perucca E, Bechard J, Dube C, Weishaupt N, Sherrington R, Bialer M. Stereoselective Analysis of the Antiseizure Activity of Fenfluramine and Norfenfluramine in Mice: Is l-Norfenfluramine a Better Follow-Up Compound to Racemic-Fenfluramine? Int J Mol Sci 2024; 25:2522. [PMID: 38473769 DOI: 10.3390/ijms25052522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/13/2024] [Accepted: 02/13/2024] [Indexed: 03/14/2024] Open
Abstract
The aim of this study was to investigate the comparative antiseizure activity of the l-enantiomers of d,l-fenfluramine and d,l-norfenfluramine and to evaluate the relationship between their concentration in plasma and brain and anticonvulsant activity. d,l-Fenfluramine, d,l-norfenfluramine and their individual enantiomers were evaluated in the mouse maximal electroshock seizure (MES) test. d,l-Fenfluramine, d,l-norfenfluramine and their individual l-enantiomers were also assessed in the DBA/2 mouse audiogenic seizure model. All compounds were administered intraperitoneally. Brain and plasma concentrations of the test compounds in DBA/2 mice were quantified and correlated with anticonvulsant activity. In the MES test, fenfluramine, norfenfluramine and their enantiomers showed comparable anticonvulsant activity, with ED50 values between 5.1 and 14.8 mg/kg. In the audiogenic seizure model, l-norfenfluramine was 9 times more potent than d,l-fenfluramine and 15 times more potent than l-fenfluramine based on ED50 (1.2 vs. 10.2 and 17.7 mg/kg, respectively). Brain concentrations of all compounds were about 20-fold higher than in plasma. Based on brain EC50 values, l-norfenfluramine was 7 times more potent than d,l-fenfluramine and 13 times more potent than l-fenfluramine (1940 vs. 13,200 and 25,400 ng/g, respectively). EC50 values for metabolically formed d,l-norfenfluramine and l-norfenfluramine were similar to brain EC50 values of the same compounds administered as such, suggesting that, in the audiogenic seizure model, the metabolites were responsible for the antiseizure activity of the parent compounds. Because of the evidence linking d-norfenfluramine to d,l-fenfluramine to cardiovascular and metabolic adverse effects, their l-enantiomers could potentially be safer follow-up compounds to d,l-fenfluramine. We found that, in the models tested, the activity of l-fenfluramine and l-norfenfluramine was comparable to that of the corresponding racemates. Based on the results in DBA/2 mice and other considerations, l-norfenfluramine appears to be a particularly attractive candidate for further evaluation as a novel, enantiomerically pure antiseizure medication.
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Affiliation(s)
- Natalia Erenburg
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112002, Israel
| | - Emilio Perucca
- Department of Medicine (Austin Health), University of Melbourne, Heidelberg, VIC 3084, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC 3168, Australia
| | - Jeff Bechard
- Xenon Pharmaceuticals Inc., 3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada
| | - Celine Dube
- Xenon Pharmaceuticals Inc., 3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada
| | - Nina Weishaupt
- Xenon Pharmaceuticals Inc., 3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada
| | - Robin Sherrington
- Xenon Pharmaceuticals Inc., 3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada
| | - Meir Bialer
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112002, Israel
- David R. Bloom Center for Pharmacy, The Hebrew University of Jerusalem, Jerusalem 9112002, Israel
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17
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Dohárszky A, Kalydi E, Völgyi G, Béni S, Fejős I. Cyclodextrin-Enabled Enantioselective Complexation Study of Cathinone Analogs. Molecules 2024; 29:876. [PMID: 38398627 PMCID: PMC10893103 DOI: 10.3390/molecules29040876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/11/2024] [Accepted: 02/12/2024] [Indexed: 02/25/2024] Open
Abstract
The characteristic alkaloid component of the leaves of the catnip shrub (Catha edulis) is cathinone, and its synthetic analogs form a major group of recreational drugs. Cathinone derivatives are chiral compounds. In the literature, several chiral methods using cyclodextrins (CDs) have been achieved so far for diverse sets of analogs; however, a comprehensive investigation of the stability of their CD complexes has not been performed yet. To characterize the enantioselective complex formation, a systematic experimental design was developed in which a total number of 40 neutral, positively, and negatively charged CD derivatives were screened by affinity capillary electrophoresis and compared according to their cavity size, substituent type, and location. The functional groups responsible for the favorable interactions were identified in the case of para-substituted cathinone analog mephedrone, flephedrone, and 4-methylethcathinone (4-MEC) and in the case of 3,4-methylendioxy derivative butylone and methylenedioxypyrovalerone (MDPV). The succinylated-β-CD and subetadex exhibited the highest complex stabilities among the studied drugs. The complex stoichiometry was determined using the Job's plot method, and the complex structures were further studied using ROESY NMR measurements. The results of our enantioselective complex formation study can facilitate chiral method development and may lead to evaluate potential CD-based antidotes for cathinone analogs.
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Affiliation(s)
- András Dohárszky
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, H-1085 Budapest, Hungary; (A.D.); (E.K.)
| | - Eszter Kalydi
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, H-1085 Budapest, Hungary; (A.D.); (E.K.)
- Department of Organic Chemistry, Semmelweis University, Hőgyes Endre utca 7, H-1092 Budapest, Hungary
| | - Gergely Völgyi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, H-1092 Budapest, Hungary;
| | - Szabolcs Béni
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, H-1085 Budapest, Hungary; (A.D.); (E.K.)
- Department of Analytical Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
| | - Ida Fejős
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, H-1085 Budapest, Hungary; (A.D.); (E.K.)
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18
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Feng J, Xu X, Huang W, Gong H, Sun X, Liu J, Xu C, Liu W. Enantioselective Toxicity of Tetramethrin to Different Developmental Stages of Zebrafish ( Danio rerio). Toxics 2024; 12:146. [PMID: 38393241 PMCID: PMC10892520 DOI: 10.3390/toxics12020146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 01/31/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024]
Abstract
Chiral pesticides exhibit enantioselective differences in processes such as biological absorption, metabolism, and toxic effects. Organisms have different physiological characteristics at different developmental stages. Therefore, conducting enantiomeric toxicity studies at different developmental stages of organisms can help deepen the understanding of the ecological effects of chiral pesticides. This study focused on trans-tetramethrin (Tet) and investigated the enantioselectivity in bioconcentration, developmental toxicity, estrogenic effects, and immunotoxicity of Tet's racemate ((±)-Tet) and its two enantiomers ((+)-Tet and (-)-Tet) in three developmental stages of zebrafish: embryos, yolk sac larvae, and juveniles. The results showed that Tet exhibited different enantioselectivity in lethal, bioconcentration, and teratogenic effects on zebrafish at different developmental stages. The LC50 value was (+)-Tet > (±)-Tet > (-)-Tet, with embryos being the most sensitive, followed by juveniles and yolk sac larvae. The enantioselective bioconcentration was (±)-Tet > (+)-Tet > (-)-Tet, and the bioconcentration effect was greater in embryos than that in yolk sac larvae and juveniles. Developmental toxicity indicated that (+)-Tet and (±)-Tet had higher teratogenic effects on yolk sac larvae than on embryos. Tet exhibited different enantioselective effects on the expression of zebrafish estrogen-related genes and innate immune-related genes at different developmental stages. These results will contribute to a more comprehensive assessment of the aquatic toxicity and environmental risks of chiral pesticides.
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Affiliation(s)
- Jiqin Feng
- Zhejiang Environment Technology Co., Ltd., Hangzhou 310000, China
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China;
| | - Xintong Xu
- Zhejiang Environment Technology Co., Ltd., Hangzhou 310000, China
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China;
| | - Wenfei Huang
- Eco-Environmental Science Research & Design Institute of Zhejiang Province, Hangzhou 310007, China
| | - Honghong Gong
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China;
| | - Xiaohui Sun
- Zhejiang Environmental Monitoring Center, Hangzhou 310012, China
| | - Jinsong Liu
- Zhejiang Environmental Monitoring Center, Hangzhou 310012, China
| | - Chao Xu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China;
| | - Weiping Liu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
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19
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Li X, Li Q, Yang L, Huang L, Peng C, Zheng J. Resolution of N-acetyl-DL-methionine methyl ester by the lipase from Brucella thiophenivorans. Chirality 2024; 36:e23643. [PMID: 38384156 DOI: 10.1002/chir.23643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/12/2023] [Accepted: 12/29/2023] [Indexed: 02/23/2024]
Abstract
In this study, lipase-catalyzed resolution of N-acetyl-DL-methionine methyl ester (N-Ac-DL-MetOMe) was evaluated. A lipase from Brucella thiophenivorans was prone to exhibit high activity and excellent enantioselectivity toward N-Ac-DL-MetOMe to produce the key chiral intermediate N-acetyl-L-methionine methyl ester (N-Ac-L-MetOMe). The results showed that the enzymatic reaction was carried out in 100 g/L racemic substrate for 2 h, the conversion reached 51.3%, the enantiomeric excess value N-Ac-L-MetOMe exceeded 99%, and the enantiomeric ratio value >200. Therefore, the lipase from B. thiophenivorans has potential prospects for the resolution of N-Ac-DL-MetOMe to produce the important intermediate N-Ac-L-MetOMe.
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Affiliation(s)
- Xiaojun Li
- Department of Fundamental Medicine, Xinyu University, Xinyu, China
| | - Qi Li
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Liying Yang
- Department of Fundamental Medicine, Xinyu University, Xinyu, China
| | - Liqin Huang
- Department of Fundamental Medicine, Xinyu University, Xinyu, China
| | - Chenchen Peng
- Department of Fundamental Medicine, Xinyu University, Xinyu, China
| | - Jianyong Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
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20
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Cho MG, Hyeong S, Park KK, Chough SH. Enantioselective Molecularly Imprinted Polymer for Tyrosine, Tryptophan, and Phenylalanine, and the Possibility of the Crop-Circle-Like Imprinting. Macromol Rapid Commun 2024; 45:e2300555. [PMID: 38016789 DOI: 10.1002/marc.202300555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/09/2023] [Indexed: 11/30/2023]
Abstract
Molecularly imprinted polymer (L-MIP) for L-tyrosine (L-Tyr) is prepared by the complexation between quaternized poly(4-vinylpyridine/divinylbenzene) (QVP) and poly(acrylamide-co-acrylic acid) (PAmA) in alkaline solution. The L-MIP shows higher enantioselectivity for L-isomers of tyrosine, together with tryptophan (Trp) and phenylalanine (Phe) compared to the D-isomers of them. The sorption isotherms of the three D-enantiomers are converged to one isotherm. It can reflect that the sorption of D-enantiomers can be relied mainly on the common segment, -CH2 -CH(NH2 )-COOH, neglecting any effect of bulkier aromatic groups. The imprinted common segment can be opened on the surface of MIP from the D-enantiomers. For the L-enantiomers, the sorption discrepancies are depended on the size of the aromatic group implying that the phenolic moiety of L-Tyr can be also opened. Thus, the imprinted sites are proposed to be opened on the surface of L-MIP similar to the crop-circle-like. The enantioselectivity factors, αef = QL /QD , for Tyr, Trp, and Phe are 1.52, 1.30, and 1.52 for L- to D-isomers, respectively. And the uptake differences between D- and L-enantiomers of Tyr, Trp, and Phe are 31.8, 20.7, and 29 mg per 1 g MIP, respectively.
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Affiliation(s)
- Min Gi Cho
- Health Science Research Center, 310 Industry Incubation II, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Seonghoon Hyeong
- Biotechnology Laboratory, Dong Yang Chem. Co, 36-8 Doncheon-ro, 10 Beon-gil, Gwangju, 61901, Republic of Korea
| | - Kyung Kgi Park
- Department of Urology, Jeju National University Hospital, School of Medicine, Jeju National University, Jeju, 63231, Republic of Korea
| | - Sung Hyo Chough
- Department of Chemical Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
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21
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Li L, Zhao X, Hu K, Xu W, Wang M, Wang H. Enantioselective Toxicity and Potential Endocrine-Disruptive Effects of the Insecticides Flufiprole and Ethiprole on Danio rerio. J Agric Food Chem 2024; 72:1509-1515. [PMID: 38190123 DOI: 10.1021/acs.jafc.3c07896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Phenylpyrazole insecticides are widely used as chiral pesticides. However, the enantioselective toxicity and potential endocrine-disrupting effects of these insecticides on aquatic organisms remain unclear. Herein, the enantioselective toxicity and potential endocrine-disrupting effects of flufiprole and ethiprole were investigated by using zebrafish embryos/larvae as a model. The acute toxicity of R-flufiprole and R-ethiprole toward zebrafish embryos and larvae was 1.8-3.1-fold higher than that of the S-configuration. Additionally, R-flufiprole and R-ethiprole had a greater effect on the expression of genes related to the hypothalamus-pituitary-gonad axis in zebrafish compared with the S-configuration. Nevertheless, both S-flufiprole and S-ethiprole exhibited a greater interference effect on the expression of genes related to the hypothalamus-pituitary-thyroid axis and a greater teratogenic effect on zebrafish than the R-configuration. Thus, this study demonstrates that both flufiprole and ethiprole exhibit enantioselective acute toxicity and developmental toxicity toward zebrafish. Furthermore, those pesticides potentially possess enantioselective endocrine-disrupting effects.
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Affiliation(s)
- Lianshan Li
- Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, School of Eco-Environment, Hebei University, Baoding 071002, China
- Institute of Xiongan New Area, Hebei University, Baoding 071002, China
| | - Xuejun Zhao
- Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, School of Eco-Environment, Hebei University, Baoding 071002, China
- Institute of Xiongan New Area, Hebei University, Baoding 071002, China
| | - Kunming Hu
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Weiye Xu
- Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, School of Eco-Environment, Hebei University, Baoding 071002, China
- Institute of Xiongan New Area, Hebei University, Baoding 071002, China
| | - Minghua Wang
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Hongjie Wang
- Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, School of Eco-Environment, Hebei University, Baoding 071002, China
- Institute of Xiongan New Area, Hebei University, Baoding 071002, China
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22
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Fang Q, Zheng K, Zeng R, Zhang Z, Shi Y, Gao Q, Xiao J, Liao M, Duan J, Cao H. Residue Behavior of Chiral Fungicide Prothioconazole and Its Major Chiral Metabolite in Flour Product Processing. J Agric Food Chem 2024; 72:679-689. [PMID: 38064576 DOI: 10.1021/acs.jafc.3c06435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
This study systematically investigates the stereoselective metabolism and residue behavior of chiral pesticide prothioconazole enantiomers during the steaming, baking, and frying of steamed buns, bread, and deep-fried dough sticks. The results show that steaming, baking, and frying can significantly promote the degradation of the prothioconazole enantiomers. In low- and high-concentration treatments, the degradation rates of prothioconazole enantiomers were over 96.0% and 45.4%, respectively, and the residual concentration of prothioconazole-desthio enantiomers was less than 32.7 μg/kg (excluding fried processing). During the processing of steamed buns, bread, and deep-fried dough sticks, the enantiomer fraction (EF) value of the prothioconazole enantiomer was close to 0.5, and the stereoselectivity was not significant. During the processing of steamed buns (low concentration), bread (low and high concentrations), and deep-fried dough sticks (low concentration), the stereoselectivity of prothioconazole-desthio was significant, and preferential enantiomer degradation occurred. Following the analysis of 120 flour product samples, the residual risk.
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Affiliation(s)
- Qingkui Fang
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei 230036, China
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
| | - Kang Zheng
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
| | - Rong Zeng
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
| | - Zhaoxian Zhang
- College of Resources and Environment, Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
| | - Yanhong Shi
- College of Resources and Environment, Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
| | - Quan Gao
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
| | - Jinjing Xiao
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei 230036, China
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
| | - Min Liao
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
| | - Jinsheng Duan
- Institute of Plant Protection and Agro-Product Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Haiqun Cao
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Anhui Agricultural University, Hefei 230036, China
- Key Laboratory of Agri-products Quality and Biosafety (Anhui Agricultural University), Ministry of Education, Hefei 230036, China
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23
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Abstract
Atropisomers have emerged as important structural scaffolds in natural products, drug design, and asymmetric synthesis. Recently, N-N biaryl atropisomers have drawn increasing interest due to their unique structure and relatively stable axes. However, its asymmetric synthesis remains scarce compared to its well-developed C-C biaryl analogs. In this concept, we summarize the asymmetric synthesis of N-N biaryl atropisomers including N-N pyrrole-pyrrole, N-N pyrrole-indole, N-N indole-indole, and N-N indole-carbazole, during which a series synthetic strategies are highlighted. Also, a synthetic evolution is briefly reviewed and an outlook of N-N biaryl atropisomers synthesis is offered.
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Affiliation(s)
- Jia Feng
- College of Chemistry and Chemical Engineering, Qingdao University, NingXia Road 308#, Qingdao, 266071, China
| | - Ren-Rong Liu
- College of Chemistry and Chemical Engineering, Qingdao University, NingXia Road 308#, Qingdao, 266071, China
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24
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Liu T, Duan X. Enantiomerization and enantioselective bioaccumulation of diclofop-methyl in tubifex worms. Chirality 2024; 36:e23618. [PMID: 37718908 DOI: 10.1002/chir.23618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/12/2023] [Accepted: 08/17/2023] [Indexed: 09/19/2023]
Abstract
In this study, the hydrolysis of diclofop-methyl (DM) in aqueous system and the bioaccumulation of its main metabolite, Diclofop (DA), in the tubifex worms were investigated using enantioselective high-performance liquid chromatography. With the addition of tubifex, rapid hydrolysis was observed for DM. It is revealed that the hydrolysis of DM in the water and the accumulation of DA in the worms were both enantioselective. Meanwhile, either the hydrolysis amount or the levels of enantioselectivity were influenced by the tubifex. After incubated for 24 h, about 94.6% of the DM was hydrolyzed and the enantiomer fraction of metabolite (DA) deviated from 0.5 with R-DA significantly higher than S-DA. The enantiopure S-DM and R-DM and S-DA and R-DA were incubated, and enantiomerizations were detected between the two DM enantiomers with S-form inversing into R-form and vice versa. It was found that the S-DM exhibited a higher tendency to invert than the R-DM.
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Affiliation(s)
- Tiantian Liu
- College of Science, Beijing Forestry University, Beijing, China
| | - Xinhong Duan
- College of Science, Beijing Forestry University, Beijing, China
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25
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Upmanis T, Sevostjanovs E, Kažoka H. Chiral recognition mechanism studies of Tyr-Arg-Phe-Lys-NH 2 tetrapeptide on crown ether-based chiral stationary phase. Chirality 2024; 36:e23619. [PMID: 37700546 DOI: 10.1002/chir.23619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/20/2023] [Accepted: 08/28/2023] [Indexed: 09/14/2023]
Abstract
Even though chiral recognition for crown-ether CSPs is generally understood, on a molecular level, exact mechanisms for the resolution are still unclear. Furthermore, short peptide analytes often contain multiple amino moieties capable of binding to the crown ether selector. In order to extend the understanding in chiral recognition mechanisms, polar organic mode separation of Tyr-Arg-Phe-Lys-NH2 tetrapeptide llll/dddd enantiomers on S- and R-(3,3'-diphenyl-1,1'-binaphthyl)-20-crown-6 stationary phases was studied with 50-mM perchloric acid in methanol as mobile phase. Deviation from the generally acceptable 1:1 stoichiometry was supported by mass spectroscopy analysis of the formed complexes between tetrapeptide enantiomer and crown ether selectors, which revealed adducts possessing 1:1, 1:2, and 1:3 stoichiometry. Further investigation of complexation induced shifts by NMR indicated on different binding mechanisms between llll/dddd enantiomers of Tyr-Arg-Phe-Lys-NH2 and crown ether selectors. Enantioselective proton shifts were observed in studied tetrapeptide tyrosine and phenylalanine residues exclusively for llll enantiomer upon binding with S-(3,3'-diphenyl-1,1'-binaphthyl)-20-crown-6 selector (and dddd enantiomer with R-(3,3'-diphenyl-1,1'-binaphthyl)-20-crown-6 selector), indicating that these two amino acid residues contribute to chiral recognition. The obtained results were in agreement with the LC data.
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Affiliation(s)
- Toms Upmanis
- Latvian Institute of Organic Synthesis, Riga, Latvia
| | | | - Helena Kažoka
- Latvian Institute of Organic Synthesis, Riga, Latvia
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26
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Zhao Z, Liao M, Hu G, Zeng S, Ge L, Yang K. Enantioselective adsorption of ibuprofen enantiomers using chiral-active carbon nanoparticles induced S-α-methylbenzylamine. Chirality 2024; 36:e23628. [PMID: 37926465 DOI: 10.1002/chir.23628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 07/11/2023] [Accepted: 10/17/2023] [Indexed: 11/07/2023]
Abstract
The chiral media is crucial to the chiral recognition and separation of enantiomers. In this study, we report the preparation of novel chiral carbon nanoparticles (CCNPs) via surface passivation using glucose as the carbon source and S-(-)-α-methylbenzylamine as the chiral ligand. The structures of the obtained CCNPs are characterized via FT-IR, Raman spectroscopy, DLS, XPS, XRD, TEM, and zeta potential analysis. These CCNPs could be employed as the chiral adsorbent and used for the enantioselective adsorption of the ibuprofen enantiomers. The results demonstrated that the CCNPs could selectively adsorb R-enantiomer from ibuprofen racemate solution and give an enantiomeric excess (e.e.) of about 50% under an optimal adsorption condition. Moreover, the regeneration efficiency of the CCNPs remained above e.e. of 43% after the fifth cycle. The present work confirmed that the prepared CCNPs show great potential in the enantioselective separation of ibuprofen racemate.
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Affiliation(s)
- Zhenbo Zhao
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
| | - Min Liao
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
| | - Gang Hu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
| | - Siwen Zeng
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
| | - Li Ge
- Medical College of Guangxi University, Nanning, China
| | - Kedi Yang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
- Medical College of Guangxi University, Nanning, China
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27
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Liu C, Sun L, Yang G, Cheng Q, Wang C, Tao Y, Sun X, Wang Z, Zhang Q. Chiral Au-Pd Alloy Nanorods with Tunable Optical Chirality and Catalytically Active Surfaces. Small 2023:e2310353. [PMID: 38150652 DOI: 10.1002/smll.202310353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/13/2023] [Indexed: 12/29/2023]
Abstract
Integrating the plasmonic chirality with excellent catalytic activities in plasmonic hybrid nanostructures provides a promising strategy to realize the chiral nanocatalysis toward many chemical reactions. However, the controllable synthesis of catalytically active chiral plasmonic nanoparticles with tailored geometries and compositions remains a significant challenge. Here it is demonstrated that chiral Au-Pd alloy nanorods with tunable optical chirality and catalytically active surfaces can be achieved by a seed-mediated coreduction growth method. Through manipulating the chiral inducers, Au nanorods selectively transform into two different intrinsically chiral Au-Pd alloy nanorods with distinct geometric chirality and tunable optical chirality. By further adjusting several key synthetic parameters, the optical chirality, composition, and geometry of the chiral Au-Pd nanorods are fine-tailored. More importantly, the chiral Au-Pd alloy nanorods exhibit appealing chiral catalytic activities as well as polarization-dependent plasmon-enhanced nanozyme catalytic activity, which has great potential for chiral nanocatalysis and plasmon-induced chiral photochemistry.
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Affiliation(s)
- Chuang Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Lichao Sun
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Guizeng Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Qingqing Cheng
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Chen Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Yunlong Tao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Xuehao Sun
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Zixu Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Qingfeng Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
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28
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Lei T, Graf S, Schöll C, Krätzschmar F, Gregori B, Appleson T, Breder A. Asymmetric Photoaerobic Lactonization and Aza-Wacker Cyclization of Alkenes Enabled by Ternary Selenium-Sulfur Multicatalysis. ACS Catal 2023; 13:16240-16248. [PMID: 38125978 PMCID: PMC10729055 DOI: 10.1021/acscatal.3c04443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/28/2023] [Accepted: 10/30/2023] [Indexed: 12/23/2023]
Abstract
An adaptable, sulfur-accelerated photoaerobic selenium-π-acid ternary catalyst system for the enantioselective allylic redox functionalization of simple, nondirecting alkenes is reported. In contrast to related photoredox catalytic methods, which largely depend on olefinic substrates with heteroatomic directing groups to unfold high degrees of stereoinduction, the current protocol relies on chiral, spirocyclic selenium-π-acids that covalently bind to the alkene moiety. The performance of this ternary catalytic method is demonstrated in the asymmetric, photoaerobic lactonization and cycloamination of enoic acids and unsaturated sulfonamides, respectively, leading to an averaged enantiomeric ratio (er) of 92:8. Notably, this protocol provides for the first time an asymmetric, catalytic entryway to pharmaceutically relevant 3-pyrroline motifs, which was used as a platform to access a 3,4-dihydroxyproline derivative in only seven steps with a 92:8 er.
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Affiliation(s)
| | | | - Christopher Schöll
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Felix Krätzschmar
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Bernhard Gregori
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Theresa Appleson
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Alexander Breder
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
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29
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Poh CYX, Rozsar D, Yang J, Christensen KE, Dixon DJ. Bifunctional Iminophosphorane Catalyzed Amide Enolization for Enantioselective Cyclohexadienone Desymmetrization. Angew Chem Int Ed Engl 2023:e202315401. [PMID: 38055190 DOI: 10.1002/anie.202315401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/07/2023]
Abstract
The organocatalytic enolization of 2-arylacetamides, followed by an enantioselective intramolecular conjugate addition to tethered 2,5-cyclohexadienones, yielding 3D fused N-heterocycles, is described. The transformation represents the first strong activating group-free activation of carboxamides via α-C-H deprotonation in a metal-free, catalytic, and enantioselective reaction, and is achieved by employing a bifunctional iminophosphorane (BIMP) superbase.
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Affiliation(s)
- Charmaine Y X Poh
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK
| | - Daniel Rozsar
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK
| | - Jinchao Yang
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK
| | - Kirsten E Christensen
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK
| | - Darren J Dixon
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK
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30
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Capone M, Dell’Orletta G, Nicholls BT, Scholes GD, Hyster TK, Aschi M, Daidone I. Evidence of a Distinctive Enantioselective Binding Mode for the Photoinduced Radical Cyclization of α-Chloroamides in Ene-Reductases. ACS Catal 2023; 13:15310-15321. [PMID: 38058601 PMCID: PMC10696551 DOI: 10.1021/acscatal.3c03934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/06/2023] [Accepted: 10/30/2023] [Indexed: 12/08/2023]
Abstract
We demonstrate here through molecular simulations and mutational studies the origin of the enantioselectivity in the photoinduced radical cyclization of α-chloroacetamides catalyzed by ene-reductases, in particular the Gluconobacter oxidans ene-reductase and the Old Yellow Enzyme 1, which show opposite enantioselectivity. Our results reveal that neither the π-facial selectivity model nor a protein-induced selective stabilization of the transition states is able to explain the enantioselectivity of the radical cyclization in the studied flavoenzymes. We propose a new enantioinduction scenario according to which enantioselectivity is indeed controlled by transition-state stability; however, the relative stability of the prochiral transition states is not determined by direct interaction with the protein but is rather dependent on an inherent degree of freedom within the substrate itself. This intrinsic degree of freedom, distinct from the traditional π-facial exposure mode, can be controlled by the substrate conformational selection upon binding to the enzyme.
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Affiliation(s)
- Matteo Capone
- Department
of Physical and Chemical Sciences, University
of L’Aquila, via
Vetoio (Coppito 1), L’Aquila 67010, Italy
| | - Gianluca Dell’Orletta
- Department
of Physical and Chemical Sciences, University
of L’Aquila, via
Vetoio (Coppito 1), L’Aquila 67010, Italy
| | - Bryce T. Nicholls
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14853, United States
| | - Gregory D. Scholes
- Department
of Chemistry, Frick Laboratory, Princeton
University, Princeton, New Jersey 08544, United States
| | - Todd K. Hyster
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14853, United States
| | - Massimiliano Aschi
- Department
of Physical and Chemical Sciences, University
of L’Aquila, via
Vetoio (Coppito 1), L’Aquila 67010, Italy
| | - Isabella Daidone
- Department
of Physical and Chemical Sciences, University
of L’Aquila, via
Vetoio (Coppito 1), L’Aquila 67010, Italy
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31
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Zhao T, Xu H, Tian Y, Tang X, Dang Y, Ge S, Ma J, Zhang F. Copper-Catalyzed Regio- and Enantioselective Hydroboration of Difluoroalkyl-Substituted Internal Alkenes. Adv Sci (Weinh) 2023; 10:e2304194. [PMID: 37880870 PMCID: PMC10724385 DOI: 10.1002/advs.202304194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/28/2023] [Indexed: 10/27/2023]
Abstract
Catalytic asymmetric hydroboration of fluoroalkyl-substituted alkenes is a straightforward approach to access chiral small molecules possessing both fluorine and boron atoms. However, enantioselective hydroboration of fluoroalkyl-substituted alkenes without fluorine elimination has been a long-standing challenge in this field. Herein, a copper-catalyzed hydroboration of difluoroalkyl-substituted internal alkenes with high levels of regio- and enantioselectivities is reported. The native carbonyl directing group, copper hydride system, and bisphosphine ligand play crucial roles in suppressing the undesired fluoride elimination. This atom-economic protocol provides a practical synthetic platform to obtain a wide scope of enantioenriched secondary boronates bearing the difluoromethylene moieties under mild conditions. Synthetic applications including functionalization of biorelevant molecules, versatile functional group interconversions, and preparation of difluoroalkylated Terfenadine derivative are also demonstrated.
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Affiliation(s)
- Tao‐Qian Zhao
- Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhou350207P. R. China
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
- Department of ChemistryNational University of Singapore3 Science Drive 3Singapore117543Singapore
| | - Hui Xu
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
| | - Yu‐Chen Tian
- Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhou350207P. R. China
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
| | - Xiaodong Tang
- Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhou350207P. R. China
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
| | - Yanfeng Dang
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
| | - Shaozhong Ge
- Department of ChemistryNational University of Singapore3 Science Drive 3Singapore117543Singapore
| | - Jun‐An Ma
- Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhou350207P. R. China
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
| | - Fa‐Guang Zhang
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology (Ministry of Education)Tianjin UniversityTianjin300072P. R. China
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32
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Zhang L, Zhang Y, Li J, Qi Y, Li L, Qin K, Lu Y, Liu C. Effect of fertilization on the degradation and enantioselectivity of fipronil in soil. Pest Manag Sci 2023; 79:5283-5291. [PMID: 37615248 DOI: 10.1002/ps.7737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/14/2023] [Accepted: 08/24/2023] [Indexed: 08/25/2023]
Abstract
BACKGROUND Fertilizers and pesticides are commonly used simultaneously in agriculture. However, the effects of common fertilizers on the dissipation, enantioselectivity, and metabolites of the chiral insecticide fipronil in soil are yet to be reported. RESULT An enantioselective method for detecting fipronil enantiomers and their metabolites in different soil matrices was developed using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The results showed that organic and compound fertilizers significantly decreased the degradation of S- and R-fipronil, whereas phosphate and microbial fertilizers slightly reduced fipronil dissipation. The half-life values for S- and R-fipronil were 43.3 and 28.9 days, 99.0 and 63.0 days, 69.3 and 43.3 days, 46.2 and 30.1 days, and 43.3 and 31.5 days, respectively, in the control and the four fertilizer treatments, respectively. The enantioselectivity of fipronil enantiomers occurred and R-fipronil exhibited preferential degradation with an enantiomeric fraction (EF) of 0.4900-0.6238 in all treatments; but the four tested fertilizers decreased enantioselectivity with EF values changed from 0.4970 to 0.6238 in the control to 0.4900-0.6171 in fertilizer treatments. Two metabolites, fipronil sulfone and sulfide, were produced, and their amounts increased with culture time in all treatments. Fertilization reduced the content of fipronil sulfide and sulfone but hardly reduced the total amount of fipronil and its metabolites. CONCLUSION Fertilizers affect the environmental behavior of fipronil in the soil. Fertilization alters the soil bacterial community, which may be an important factor. This influence is relatively complicated and should be comprehensively considered in the environmental risk assessment of pesticides. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Leihong Zhang
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou, China
| | - Yirong Zhang
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou, China
| | - Jindong Li
- Laboratory of Quality and Safety Risk Assessment for Agro-Products (Taiyuan), Ministry of Agriculture and Rural Affairs, Shanxi Agricultural University, Taiyuan, China
| | - Yanli Qi
- Laboratory of Quality and Safety Risk Assessment for Agro-Products (Taiyuan), Ministry of Agriculture and Rural Affairs, Shanxi Agricultural University, Taiyuan, China
| | - Li Li
- College of Plant Protection, Shanxi Agricultural University, Taiyuan, China
| | - Kaikai Qin
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou, China
| | - Yongyue Lu
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou, China
| | - Chenglan Liu
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou, China
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Xu ZW, Wang S. Access to Chiral O,O-Acetals Enabled by Palladium-Catalyzed Asymmetric Addition of Oximes to Alkoxyallenes. Chemistry 2023; 29:e202301883. [PMID: 37653541 DOI: 10.1002/chem.202301883] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/19/2023] [Accepted: 08/31/2023] [Indexed: 09/02/2023]
Abstract
Enantiomerically pure acyclic O,O-acetal compounds (up to 97 % ee) have been accessed through chemo-, regio- and enantioselective palladium-catalyzed addition of oximes to alkoxyallenes. DFT calculations support that a protonative hydropalladation pathway is favourable, in which the hydrogen bonding interaction between the amide group of the diphosphine ligand and the alkoxyallene is critical for the highly stereoselective formation of the dioxygenated stereogenic center.
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Affiliation(s)
- Zhuo-Wei Xu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, 210023, Nanjing, Jiangsu, China
| | - Shaozhong Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, 210023, Nanjing, Jiangsu, China
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34
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Snajdarova K, Marques SM, Damborsky J, Bednar D, Marek M. Atypical homodimerization revealed by the structure of the (S)-enantioselective haloalkane dehalogenase DmmarA from Mycobacterium marinum. Acta Crystallogr D Struct Biol 2023; 79:956-970. [PMID: 37860958 PMCID: PMC10619424 DOI: 10.1107/s2059798323006642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/31/2023] [Indexed: 10/21/2023] Open
Abstract
Haloalkane dehalogenases (HLDs) are a family of α/β-hydrolase fold enzymes that employ SN2 nucleophilic substitution to cleave the carbon-halogen bond in diverse chemical structures, the biological role of which is still poorly understood. Atomic-level knowledge of both the inner organization and supramolecular complexation of HLDs is thus crucial to understand their catalytic and noncatalytic functions. Here, crystallographic structures of the (S)-enantioselective haloalkane dehalogenase DmmarA from the waterborne pathogenic microbe Mycobacterium marinum were determined at 1.6 and 1.85 Å resolution. The structures show a canonical αβα-sandwich HLD fold with several unusual structural features. Mechanistically, the atypical composition of the proton-relay catalytic triad (aspartate-histidine-aspartate) and uncommon active-site pocket reveal the molecular specificities of a catalytic apparatus that exhibits a rare (S)-enantiopreference. Additionally, the structures reveal a previously unobserved mode of symmetric homodimerization, which is predominantly mediated through unusual L5-to-L5 loop interactions. This homodimeric association in solution is confirmed experimentally by data obtained from small-angle X-ray scattering. Utilizing the newly determined structures of DmmarA, molecular modelling techniques were employed to elucidate the underlying mechanism behind its uncommon enantioselectivity. The (S)-preference can be attributed to the presence of a distinct binding pocket and variance in the activation barrier for nucleophilic substitution.
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Affiliation(s)
- Karolina Snajdarova
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, Building A13, 625 00 Brno, Czech Republic
| | - Sérgio M. Marques
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, Building A13, 625 00 Brno, Czech Republic
- International Clinical Research Center, St Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Jiri Damborsky
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, Building A13, 625 00 Brno, Czech Republic
- International Clinical Research Center, St Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - David Bednar
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, Building A13, 625 00 Brno, Czech Republic
- International Clinical Research Center, St Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Martin Marek
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, Building A13, 625 00 Brno, Czech Republic
- International Clinical Research Center, St Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
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35
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Clowes SR, Ali Y, Astley OR, Răsădean DM, Pantoş GD. The Influence of Chirality on the β-Amino-Acid Naphthalenediimides/G-Quadruplex DNA Interaction. Molecules 2023; 28:7291. [PMID: 37959711 PMCID: PMC10647805 DOI: 10.3390/molecules28217291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023] Open
Abstract
G-quadruplexes (G4s) have been identified as a potential alternative chemotherapy target. A series of eight β-amino acid derived naphthalenediimides (NDI) were screened against a series of oncogenic G4 sequences: c-KIT1, h-TELO, and TBA. Three sets of enantiomers were investigated to further our understanding of the effect of point chirality on G4 stabilisation. Enantioselective binding behaviour was observed with both c-KIT1 and h-TELO. Docking studies using GNINA and UV-vis titrations were employed to better understand this selective binding behaviour.
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Affiliation(s)
| | | | | | | | - G. Dan Pantoş
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
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36
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Pérez Sevillano R, Ferreira F, Jackowski O. Transition-Metal-Free Synthesis of Enantioenriched Tertiary and Quaternary α-Chiral Allylsilanes. Chemistry 2023; 29:e202302227. [PMID: 37489288 DOI: 10.1002/chem.202302227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 07/26/2023]
Abstract
Access to enantioenriched tertiary and quaternary α-chiral allysilanes without any transition-metal catalyst is reported. This was achieved by enantioselective allylic displacement of γ-silylated allylic bromides through Lewis base activation of Grignard reagents by a bidentate chiral NHC ligand. The process afforded both high γ-regio- and enantioselectivity and is compatible with a wide range of silyl groups on the substrates.
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Affiliation(s)
- Rubén Pérez Sevillano
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire IPCM, 4 place Jussieu, F-75005, Paris, France
| | - Franck Ferreira
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire IPCM, 4 place Jussieu, F-75005, Paris, France
| | - Olivier Jackowski
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire IPCM, 4 place Jussieu, F-75005, Paris, France
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37
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Hilche T, Krebs T, Weißbarth H, Lang F, Schnakenburg G, Gansäuer A. Enantio- and Diastereomerically Pure Titanocenes by Dynamic Conformational Locking. Chemistry 2023; 29:e202301645. [PMID: 37283199 DOI: 10.1002/chem.202301645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/05/2023] [Accepted: 06/05/2023] [Indexed: 06/08/2023]
Abstract
The synthesis of enantiomerically pure titanocenes is limited to cases with enantiomerically pure substituents at the cyclopentadienyl ligands and to ansa-titanocenes. For the latter complexes, the use of achiral ligands requires a resolution of enantiomers and frequently also a separation of the diastereoisomers obtained after metalation. Here, we introduce a new synthetic method that relies on the use of enantiomerically pure camphorsulfonate (CSA) ligands as control elements for the absolute and relative configuration of titanocene complexes. Starting from the conformationally flexible (RC5 H4 )2 TiCl2 , the desired conformationally locked and hence enantio- and diastereomerically pure complexes (RC5 H4 )2 Ti(CSA)2 are obtained in just two steps. According to X-ray crystallography the (RC5 H4 )2 Ti fragment is essentially C2 -symmetric and nuclear magnetic resonance displays overall C2 -symmetry. We applied density functional theory methods to unravel the dynamics of the complexes and the mechanisms and selectivities of their formation.
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Affiliation(s)
- Tobias Hilche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Tim Krebs
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Hendrik Weißbarth
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Fabian Lang
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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38
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Sun L, Tao Y, Yang G, Liu C, Sun X, Zhang Q. Geometric Control and Optical Properties of Intrinsically Chiral Plasmonic Nanomaterials. Adv Mater 2023:e2306297. [PMID: 37572380 DOI: 10.1002/adma.202306297] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/03/2023] [Indexed: 08/14/2023]
Abstract
Intrinsically chiral plasmonic nanomaterials exhibit intriguing geometry-dependent chiroptical properties, which is due to the combination of plasmonic features with geometric chirality. Thus, chiral plasmonic nanomaterials have become promising candidates for applications in biosensing, asymmetric catalysis, biomedicine, photonics, etc. Recent advances in geometric control and optical tuning of intrinsically chiral plasmonic nanomaterials have further opened up a unique opportunity for their widespread applications in many emerging technological areas. Here, the recent developments in the geometric control of chiral plasmonic nanomaterials are reviewed with special attention given to the quantitative understanding of the chiroptical structure-property relationship. Several important optical spectroscopic tools for characterizing the optical chirality of plasmonic nanomaterials at both ensemble and single-particle levels are also discussed. Three emerging applications of chiral plasmonic nanomaterials, including enantioselective sensing, enantioselective catalysis, and biomedicine, are further highlighted. It is envisioned that these advanced studies in chiral plasmonic nanomaterials will pave the way toward the rational design of chiral nanomaterials with desired optical properties for diverse emerging technological applications.
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Affiliation(s)
- Lichao Sun
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Yunlong Tao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Guizeng Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Chuang Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Xuehao Sun
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Qingfeng Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
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39
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Salameh N, Valentini F, Baudoin O, Vaccaro L. A General Enantioselective C-H Arylation Using an Immobilized Recoverable Palladium Catalyst. ChemSusChem 2023:e202300609. [PMID: 37486306 DOI: 10.1002/cssc.202300609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/11/2023] [Accepted: 07/24/2023] [Indexed: 07/25/2023]
Abstract
We herein report a general and efficient enantioselective C-H arylation of aryl bromides based on the use of BozPhos as the bisphosphine ligand and SP-NHC-PdII as recoverable heterogeneous catalyst. By exploiting the "release and catch" mechanism of action of the catalytic system, we used BozPhos as a broadly applicable chiral ligand, furnishing high enantioselectivities across all types of examined substrates containing methyl, cyclopropyl and aryl C-H bonds. For each reaction, the reaction scope was investigated, giving rise to 30 enantioenriched products, obtained with high yields and enantioselectivities, and minimal palladium leaching. The developed catalytic system provides a more sustainable solution compared to homogeneous systems for the synthesis of high added-value chiral products through recycling of the precious metal.
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Affiliation(s)
- Nihad Salameh
- Laboratory of Green SOC, Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto, 8, 06124, Perugia, Italy
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056, Basel, Switzerland
| | - Federica Valentini
- Laboratory of Green SOC, Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto, 8, 06124, Perugia, Italy
| | - Olivier Baudoin
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056, Basel, Switzerland
| | - Luigi Vaccaro
- Laboratory of Green SOC, Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto, 8, 06124, Perugia, Italy
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40
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Fogel M, Koide K. Recent Progress on One-Pot Multisubstrate Screening. Org Process Res Dev 2023; 27:1235-1247. [PMID: 37529075 PMCID: PMC10389808 DOI: 10.1021/acs.oprd.3c00128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Indexed: 08/03/2023]
Abstract
Traditionally, new synthetic reactions have been developed using a model substrate to screen reaction conditions before testing the optimized conditions with a range of more complex substrates. In 1998, Gao and Kagan pooled multiple substrates in one pot to study the generality of an enantioselective method. Although such one-pot multisubstrate screenings may be powerful, few applications have appeared in the literature. With the advancement of various chromatography techniques, it may be time to revisit this underutilized platform. This review article discusses the applications of one-pot multisubstrate screenings as a method for developing new synthetic methods.
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41
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Yeo S, Choi A, Greaves S, Meijer AJHM, Silvestri IP, Coldham I. Kinetic Resolution of 2-Aryldihydroquinolines Using Lithiation - Synthesis of Chiral 1,2- and 1,4-Dihydroquinolines. Chemistry 2023; 29:e202300815. [PMID: 37067465 PMCID: PMC10946909 DOI: 10.1002/chem.202300815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 04/18/2023]
Abstract
Highly enantiomerically enriched dihydrohydroquinolines were prepared in two steps from quinoline. Addition of aryllithiums to quinoline with tert-butoxycarbonyl (Boc) protection gave N-Boc-2-aryl-1,2-dihydroquinolines. These were treated with n-butyllithium and electrophilic trapping occurred exclusively at C-4 of the dihydroquinoline, a result supported by DFT studies. Variable temperature NMR spectroscopy gave kinetic data for the barrier to rotation of the carbonyl group (ΔG≠ ≈49 kJ mol-1 , 195 K). Lithiation using the diamine sparteine allowed kinetic resolutions with high enantioselectivities (enantiomer ratio up to 99 : 1). The enantioenriched 1,2-dihydroquinolines could be converted to 1,4-dihydroquinolines with retention of stereochemistry. Further functionalisation led to trisubstituted products. Reduction provided enantioenriched tetrahydroquinolines, whereas acid-promoted removal of Boc led to quinolines, and this was applied to a synthesis of the antimalarial compound M5717.
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Affiliation(s)
- Song‐Hee Yeo
- Department of ChemistryUniversity of SheffieldBrook HillSheffieldS3 7HFUK
| | - Anthony Choi
- Department of ChemistryUniversity of SheffieldBrook HillSheffieldS3 7HFUK
| | - Sophie Greaves
- Department of ChemistryUniversity of SheffieldBrook HillSheffieldS3 7HFUK
| | | | | | - Iain Coldham
- Department of ChemistryUniversity of SheffieldBrook HillSheffieldS3 7HFUK
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42
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Vieira SF, Araújo J, Gonçalves VMF, Fernandes C, Pinto M, Ferreira H, Neves NM, Tiritan ME. Synthesis and Anti-Inflammatory Evaluation of a Library of Chiral Derivatives of Xanthones Conjugated with Proteinogenic Amino Acids. Int J Mol Sci 2023; 24:10357. [PMID: 37373503 DOI: 10.3390/ijms241210357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023] Open
Abstract
In recent decades, the relationship between drug chirality and biological activity has been assuming enormous importance in medicinal chemistry. Particularly, chiral derivatives of xanthones (CDXs) have interesting biological activities, including enantioselective anti-inflammatory activity. Herein, the synthesis of a library of CDXs is described, by coupling a carboxyxanthone (1) with both enantiomers of proteinogenic amino esters as chiral building blocks (2-31), following the chiral pool strategy. The coupling reactions were performed at room temperature with good yields (from 44 to 99.9%) and very high enantiomeric purity, with most of them presenting an enantiomeric ratio close to 100%. To afford the respective amino acid derivatives (32-61), the ester group of the CDXs was hydrolyzed in mild alkaline conditions. Consequently, in this work, sixty new derivatives of CDXs were synthetized. The cytocompatibility and anti-inflammatory activity in the presence of M1 macrophages were studied for forty-four of the new synthesized CDXs. A significant decrease in the levels of a proinflammatory cytokine targeted in the treatment of several inflammatory diseases, namely interleukin 6 (IL-6), was achieved in the presence of many CDXs. The amino ester of L-tyrosine (X1AELT) was the most effective in reducing IL-6 production (52.2 ± 13.2%) by LPS-stimulated macrophages. Moreover, it was ≈1.2 times better than the D-enantiomer. Indeed, enantioselectivity was observed for the majority of the tested compounds. Thus, their evaluation as promising anti-inflammatory drugs should be considered.
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Affiliation(s)
- Sara F Vieira
- 3B's Research Group, I3BS-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Joana Araújo
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Virgínia M F Gonçalves
- TOXRUN-Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, 4585-116 Gandra, Portugal
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal
| | - Carla Fernandes
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
| | - Madalena Pinto
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
| | - Helena Ferreira
- 3B's Research Group, I3BS-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Nuno M Neves
- 3B's Research Group, I3BS-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Maria Elizabeth Tiritan
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
- TOXRUN-Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, 4585-116 Gandra, Portugal
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
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43
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Xiang Q, Zhou Y, Tan C. Enantioselective Toxic Effects of Prothioconazole toward Scenedesmus obliquus. Molecules 2023; 28:4774. [PMID: 37375329 DOI: 10.3390/molecules28124774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/08/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Prothioconazole (PTC) is a broad-spectrum triazole fungicide with one asymmetric center and consists of two enantiomers, R-(-)-PTC and S-(+)-PTC. To address the concern of its environmental safety, the enantioselective toxic effects of PTC on Scendesmus obliquus (S. obliquus) were investigated. PTC racemates (Rac-PTC) and enantiomers exhibited dose-dependent acute toxicity effects against S. obliquus at a concentration from 1 to 10 mg·L-1. The 72 h-EC50 value of Rac-, R-(-)-, and S-(+)-PTC is 8.15, 16.53, and 7.85 mg·L-1, respectively. The growth ratios and photosynthetic pigment contents of the R-(-)-PTC treatment groups were higher than the Rac- and S-(+)-PTC treatment groups. Both catalase (CAT) activities and esterase activities were inhibited in the Rac- and S-(+)-PTC treatment groups at high concentrations of 5 and 10 mg·L-1, and the levels of malondialdehyde (MDA) were elevated, which exceeded the levels in algal cells for the R-(-)-PTC treatment groups. PTC could disrupt the cell morphology of S. obliquus and induce cell membrane damage, following the order of S-(+)-PTC ≈ Rac-PTC > R-(-)-PTC. The enantioselective toxic effects of PTC on S. obliquus provide essential information for its ecological risk assessment.
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Affiliation(s)
- Qingqing Xiang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ying Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
- Environmental Microplastic Pollution Research Center, Zhejiang University of Technology, Hangzhou 310014, China
| | - Chengxia Tan
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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44
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Zhang XM, Bai YM, Ai LL, Wu FH, Shan WL, Kang YS, Luo L, Chen K, Xu F. A Chiral Metal-Organic Framework Prepared on Large-Scale for Sensitive and Enantioselective Fluorescence Recognition. Molecules 2023; 28:4593. [PMID: 37375148 DOI: 10.3390/molecules28124593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/03/2023] [Accepted: 05/08/2023] [Indexed: 06/29/2023] Open
Abstract
MOF-based luminescent sensors have garnered considerable attention due to their potential in recognition and discrimination with high sensitivity, selectivity, and fast response in the last decades. Herein, this work describes the bulk preparation of a novel luminescent homochiral MOF, namely, [Cd(s-L)](NO3)2 (MOF-1), from an enantiopure pyridyl-functionalized ligand with rigid binaphthol skeleton under mild synthetic condition. Except for the features of porosity and crystallinity, the MOF-1 has also been characterized with water-stability, luminescence, and homochirality. Most important, the MOF-1 exhibits highly sensitive molecular recognition toward the4-nitrobenzoic acid (NBC) and moderate enantioselective detection of proline, arginine, and 1-phenylethanol.
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Affiliation(s)
- Xin-Mei Zhang
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Yan-Mei Bai
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Lu-Lu Ai
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Fang-Hui Wu
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Wei-Long Shan
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Yan-Shang Kang
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Li Luo
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Kai Chen
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Fan Xu
- SJTU SMSE-Mingguang Joint Research Center for Advanced Palygoskite Materials, Mingguang Mingyao Attapulgite Industry Technology Co., Ltd., Chuzhou 239400, China
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45
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Li Z, Huan L, Li J, Shu X, Zhong D, Zhang W, Huo H. Metallaphotoredox-Catalyzed Enantioselective Cross-Electrophile Coupling Using Alcohols as Reducing Agents. Angew Chem Int Ed Engl 2023:e202305889. [PMID: 37261433 DOI: 10.1002/anie.202305889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/24/2023] [Accepted: 06/01/2023] [Indexed: 06/02/2023]
Abstract
The cross-electrophile coupling (XEC) represents a powerful strategy for C-C bond formation. However, controlling the enantioselectivity in these processes remains an outstanding challenge. Here, we report an unprecedented enantioselective XEC of α-amino acid derivatives with aryl bromides, enabled by the identification of alcohols as reducing agents via Ni/photoredox catalysis. This mechanistically distinct approach exploits the ability of photocatalytically generated α-hydroxyalkyl radicals to convert alkyl electrophiles to the corresponding alkyl radicals that are then enantioselectively coupled with aryl bromides. The readily scalable protocol allows modular access to valuable enantioenriched benzylic amines from abundant and inexpensive precursors, and is applicable to late-stage diversification with broad functional group tolerance. Mechanistic studies rationalize the versatility of this alcohol-based reactivity for radical generation and subsequent asymmetric cross-coupling. We expect that this alcohol-based cross-coupling will render a general platform for the development of appealing yet challenging enantioselective XECs.
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Affiliation(s)
- Zhilong Li
- Xiamen University, College of Chemistry and Chemical Engineering, CHINA
| | - Leitao Huan
- Xiamen University, College of Chemistry and Chemical Engineering, CHINA
| | - Jian Li
- Xiamen University, College of Chemistry and Chemical Engineering, CHINA
| | - Xiaomin Shu
- Xiamen University, College of Chemistry and Chemical Engineering, CHINA
| | - De Zhong
- Xiamen University, College of Chemistry and Chemical Engineering, CHINA
| | - Wenjing Zhang
- Xiamen University, College of Chemistry and Chemical Engineering, CHINA
| | - Haohua Huo
- Xiamen University, College of Chemistry and Chemical Engineering, 422 S. Si-Ming Road, 361005, Xiamen, CHINA
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46
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Miao W, Zhang J, Yang Y, Tang W, Xue D, Xiao J, Sun H, Wang C. β-Arylation of Racemic Secondary Benzylic Alcohols to Access Enantioenriched β-Arylated Alcohols. Angew Chem Int Ed Engl 2023:e202306015. [PMID: 37249123 DOI: 10.1002/anie.202306015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/24/2023] [Accepted: 05/30/2023] [Indexed: 05/31/2023]
Abstract
The transformation of alcohols into value-added products is of great importance, as simple alcohols are widespread and can be easily derived from both fossil fuels and biomass. The selective functionalization of a sp3 C-H bond on the alkyl side chain of an alcohol over its hydroxyl group would offer an expedient route to expand the chemical space of alcohols but it remains a challenging task. Harnessing the borrowing hydrogen strategy, the β-arylation of secondary alcohols with aryl bromides has been achieved in this study, which allows for the selective functionalization of a β-Csp3-H bond in an alcohol substrate. Under the catalysis of a Pd complex, secondary alcohols reacted with aryl bromides to afford 1,2-diaryl alcohols with broad substrate scope in the presence of a ketone additive. Furthermore, the enantioconvergent version of the reaction has also been realized, transforming racemic secondary alcohols into enantioenriched chiral 1,2-diaryl alcohols under the cooperative Pd and Ru catalysis. Mechanism studies indicate that the reactions are enabled by borrowing hydrogen catalysis.
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Affiliation(s)
- Wang Miao
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
| | - Jinyu Zhang
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
| | - Yanyan Yang
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
| | - Weijun Tang
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
| | - Dong Xue
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
| | - Jianliang Xiao
- University of Liverpool, Department of Chemistry, L69 7ZD, Liverpool, UNITED KINGDOM
| | - Huaming Sun
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
| | - Chao Wang
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, South Chang'an Road, 710062, Xi'an, CHINA
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47
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Zhu H, Qin K, Zhang P, Wang H. Enantiomeric Separation and Degradation of Benoxacor Enantiomers in Horticultural Soil by Normal-Phase and Reversed-Phase High Performance Liquid Chromatography. Int J Mol Sci 2023; 24:ijms24108887. [PMID: 37240233 DOI: 10.3390/ijms24108887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
The separation of benoxacor enantiomers on six commercial chiral columns was investigated by high-performance liquid chromatography (HPLC) under normal-phase and reversed-phase conditions. The mobile phases included hexane/ethanol, hexane/isopropanol, acetonitrile/water, and methanol/water. The effects of the chiral stationary phases (CSPs), temperature, and mobile phase composition and ratio on the separation of benoxacor enantiomers were examined. Under normal-phase conditions, the two benoxacor enantiomers were completely separated on Chiralpak AD, Chiralpak IC, Lux Cellulose-1, and Lux Cellulose-3 columns and partially separated on a Lux Cellulose-2 column. Under reversed-phase conditions, benoxacor enantiomers were completely separated on a Lux Cellulose-3 column and partially separated on Chiralpak IC and Lux Cellulose-1 columns. Normal-phase HPLC performed better than reversed-phase HPLC for the separation of benoxacor enantiomers. As the column temperature increased from 10 °C to 4 °C, the enthalpy (ΔH) and entropy (ΔS) results indicated that the resolution was strongly affected by the temperature and that the lowest temperature did not always produce the best resolution. An optimized separation method on the Lux Cellulose-3 column was used to investigate the stability of benoxacor enantiomers in solvents and the degradation of benoxacor enantiomers in three types of horticultural soil. Benoxacor enantiomers were stable, and degradation or racemization were not observed in methanol, ethanol, isopropanol, acetonitrile, hexane, or water (pH = 4.0, 7.0, and 9.0). In three horticultural soils, the degradation rate of S-benoxacor was faster than that of R-benoxacor, resulting in soil enrichment with R-benoxacor. The results of this study will help to improve the risk assessment of enantiomer levels of benoxacor in the environment.
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Affiliation(s)
- Haoxiang Zhu
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China
| | - Kunrong Qin
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China
| | - Ping Zhang
- College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Haiyang Wang
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China
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48
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Wang J, Shi Y, Wang F, Huang F, Bai S, Zhao Y, Zhang X. Concise Synthesis of Chiral Tricyclic Lactams by Tandem Dynamic Kinetic Asymmetric Reductive Amination/Lactamization Using Ammonium Salts. Angew Chem Int Ed Engl 2023:e202303868. [PMID: 37086028 DOI: 10.1002/anie.202303868] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/18/2023] [Accepted: 04/21/2023] [Indexed: 04/23/2023]
Abstract
The atom- and step- efficient synthesis of chiral fused tricyclic lactams from readily available keto esters using cheap ammonium salts as the nitrogen source is reported. This Ru-catalyzed system operates through an efficient tandem dynamic kinetic asymmetric reductive amination (ARA)/lactamization, and produces chiral fused tricyclic lactams in high yields and excellent diastereo- and enantioselectivities (up to >99% ee, >20:1 dr and 98% yield). The robust method is also applied to the concise synthesis of key intermediates of the Rivastigmine analogues and chiral N-heterocyclic carbene catalyst.
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Affiliation(s)
- Jingxin Wang
- Southern University of Science and Technology, Department of Chemistry, CHINA
| | - Yongjie Shi
- Southern University of Science and Technology, Department of Chemistry, CHINA
| | - Fangyuan Wang
- Southern University of Science and Technology, Department of Chemistry, CHINA
| | - Fanping Huang
- Southern University of Science and Technology, Department of Chemistry, CHINA
| | - Shaotao Bai
- Shenzhen Polytechnic, Institute of Carbon-Neutral Technology, No. 7098 Liuxian Avenue, Nanshan District, 518055, Shenzhen, CHINA
| | - Yu Zhao
- National University of Singapore, Department of Chemistry, SINGAPORE
| | - Xumu Zhang
- Southern University of Science and Technology, Department of Chemistry, CHINA
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49
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Bučko M, Kaniaková K, Hronská H, Gemeiner P, Rosenberg M. Epoxide Hydrolases: Multipotential Biocatalysts. Int J Mol Sci 2023; 24:ijms24087334. [PMID: 37108499 PMCID: PMC10138715 DOI: 10.3390/ijms24087334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Epoxide hydrolases are attractive and industrially important biocatalysts. They can catalyze the enantioselective hydrolysis of epoxides to the corresponding diols as chiral building blocks for bioactive compounds and drugs. In this review article, we discuss the state of the art and development potential of epoxide hydrolases as biocatalysts based on the most recent approaches and techniques. The review covers new approaches to discover epoxide hydrolases using genome mining and enzyme metagenomics, as well as improving enzyme activity, enantioselectivity, enantioconvergence, and thermostability by directed evolution and a rational design. Further improvements in operational and storage stabilization, reusability, pH stabilization, and thermal stabilization by immobilization techniques are discussed in this study. New possibilities for expanding the synthetic capabilities of epoxide hydrolases by their involvement in non-natural enzyme cascade reactions are described.
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Affiliation(s)
- Marek Bučko
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Katarína Kaniaková
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Helena Hronská
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Peter Gemeiner
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Michal Rosenberg
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
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50
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Franta M, Gramüller J, Dullinger P, Kaltenberger S, Horinek D, Gschwind RM. Brønsted Acid Catalysis - Controlling the Competition of Monomeric versus Dimeric Reaction Pathway Enhances Stereoselectivities. Angew Chem Int Ed Engl 2023:e202301183. [PMID: 36994733 DOI: 10.1002/anie.202301183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 03/31/2023]
Abstract
Chiral phosphoric acids (CPA) have become a privileged catalyst type in organocatalysis, but the selection of the optimum catalyst is still challenging. So far hidden competing reaction pathways may limit the maximum stereoselectivities and the potential of prediction models. In CPA catalyzed transfer hydrogenation of imines, we identified for many systems two reaction pathways with inverse stereoselectivity, featuring as active catalyst either one CPA or a hydrogen bond bridged dimer. NMR measurements and DFT calculations revealed the dimeric intermediate and a stronger substrate activation via cooperativity. Both pathways are separable: Low temperatures and high catalysts loadings favor the dimeric pathway (ee up to -98%), while low temperatures with reduced catalyst loading favor the monomeric pathway and give significantly enhanced ee (92-99% ee; prior 68-86% at higher temperatures). Thus, a broad impact is expected on CPA catalysis regarding reaction optimization and prediction.
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Affiliation(s)
- Maximilian Franta
- Universität Regensburg: Universitat Regensburg, Fakultät für Chemie und Pharmazie, GERMANY
| | - Johannes Gramüller
- Universität Regensburg: Universitat Regensburg, Fakultät für Chemie und Pharmazie, GERMANY
| | - Philipp Dullinger
- Universität Regensburg: Universitat Regensburg, Fakultät für Chemie und Pharmazie, GERMANY
| | - Simon Kaltenberger
- Universität Regensburg: Universitat Regensburg, Fakultät für Chemie und Pharmazie, GERMANY
| | - Dominik Horinek
- Universitat Regensburg, Institute of Physical and Theoretical Chemistry, GERMANY
| | - Ruth M Gschwind
- Universitat Regensburg, Institut für Organische Chemie, Universitätsstraße 31, 93053, Regensburg, GERMANY
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