1
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Fan G, Wang Q, Xu J, Zheng P, Chi YR. Carbene-catalyzed chemoselective reaction of unsymmetric enedials for access to Furo[2,3-b]pyrroles. Nat Commun 2023; 14:4243. [PMID: 37454112 PMCID: PMC10349821 DOI: 10.1038/s41467-023-39988-z] [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: 01/07/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023] Open
Abstract
A carbene-catalyzed chemoselective reaction of unsymmetric enedials is disclosed. The reaction provides a concise access to bicyclic furo[2,3-b]pyrroles derivatives in excellent selectivity. A main challenge in this reaction is chemoselective reaction of the two aldehyde moieties in the enedial substrates. Mechanistic studies via experiments suggest that our chemoselectivity controls are mostly achieved on the reducing properties of different sited Breslow intermediates. Several side reactions processes and the corresponding side adducts are also studied by high resolution mass spectroscopy analysis. Our method allows for efficient assembly of the furo[2,3-b]pyrrole structural moieties and their analogues widely found in natural products and pharmaceuticals.
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Affiliation(s)
- Guodong Fan
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Qingyun Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine, 550025, Guiyang, China
| | - Pengcheng Zheng
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, 550025, Guiyang, China.
| | - Yonggui Robin Chi
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, 550025, Guiyang, China.
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore.
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2
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Zhou H, Properzi R, Leutzsch M, Belanzoni P, Bistoni G, Tsuji N, Han JT, Zhu C, List B. Organocatalytic DYKAT of Si-Stereogenic Silanes. J Am Chem Soc 2023; 145:4994-5000. [PMID: 36826435 PMCID: PMC9999423 DOI: 10.1021/jacs.3c00858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Chiral organosilanes do not exist in nature and are therefore absent from the "chiral pool". As a consequence, synthetic approaches toward enantiopure silanes, stereogenic at silicon, are rather limited. While catalytic asymmetric desymmetrization reactions of symmetric organosilicon compounds have been developed, the utilization of racemic silanes in a dynamic kinetic asymmetric transformation (DYKAT) or dynamic kinetic resolution (DKR) would significantly expand the breadth of accessible Si-stereogenic compounds. We now report a DYKAT of racemic allyl silanes enabled by strong and confined imidodiphosphorimidate (IDPi) catalysts, providing access to Si-stereogenic silyl ethers. The products of this reaction are easily converted into useful enantiopure monohydrosilanes. We propose a spectroscopically and experimentally supported mechanism involving the epimerization of a catalyst-bound intermediate.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Roberta Properzi
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Paola Belanzoni
- University of Perugia, Department of Chemistry, Biology and Biotechnology, 06122 Perugia, Italy
| | - Giovanni Bistoni
- University of Perugia, Department of Chemistry, Biology and Biotechnology, 06122 Perugia, Italy
| | - Nobuya Tsuji
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Jung Tae Han
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Chendan Zhu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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3
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Begum Z, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Nakano H. New boro amino amide organocatalysts for asymmetric cross aldol reaction of ketones with carbonyl compounds. RSC Adv 2023; 13:888-894. [PMID: 36686933 PMCID: PMC9811241 DOI: 10.1039/d2ra06272k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/20/2022] [Indexed: 01/05/2023] Open
Abstract
Distinct types of new boron fused primary amino amide organocatalysts were designed and synthesized from commercially available amino acids. Their catalytic activities were investigated in asymmetric crossed aldol reaction of ketones with aromatic aldehydes to afford the corresponding chiral anti-aldol adducts with good chemical yields, moderate diastereoselectivity and good to excellent enantioselectivities (up to 94% yields, up to 90 : 10 dr, up to 94% ee).
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Affiliation(s)
- Zubeda Begum
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Yuko Okuyama
- Tohoku Medical and Pharmaceutical University4-4-1 Komatsushima, Aoba-KuSendai 981-8558Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Sciences, Tohoku University6-3 Aoba, Aramaki, Aoba-KuSendai 980-8578Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Michio Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | - Suguru Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
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4
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Zhou H, Han JT, Nöthling N, Lindner MM, Jenniches J, Kühn C, Tsuji N, Zhang L, List B. Organocatalytic Asymmetric Synthesis of Si-Stereogenic Silyl Ethers. J Am Chem Soc 2022; 144:10156-10161. [PMID: 35649270 PMCID: PMC9490845 DOI: 10.1021/jacs.2c04261] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
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Functionalized enantiopure
organosilanes are important building
blocks with applications in various fields of chemistry; nevertheless,
asymmetric synthetic methods for their preparation are rare. Here
we report the first organocatalytic enantioselective synthesis of
tertiary silyl ethers possessing “central chirality”
on silicon. The reaction proceeds via a desymmetrizing carbon–carbon
bond forming silicon–hydrogen exchange reaction of symmetrical
bis(methallyl)silanes with phenols using newly developed imidodiphosphorimidate
(IDPi) catalysts. A variety of enantiopure silyl ethers was obtained
in high yields with good chemo- and enantioselectivities and could
be readily derivatized to several useful chiral silicon compounds,
leveraging the olefin functionality and the leaving group nature of
the phenoxy substituent.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Jung Tae Han
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Nils Nöthling
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Monika M Lindner
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Judith Jenniches
- Innovation Center, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Clemens Kühn
- Innovation Center, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Nobuya Tsuji
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Li Zhang
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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5
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Ouyang J, Maji R, Leutzsch M, Mitschke B, List B. Design of an Organocatalytic Asymmetric (4 + 3) Cycloaddition of 2-Indolylalcohols with Dienolsilanes. J Am Chem Soc 2022; 144:8460-8466. [PMID: 35523203 PMCID: PMC9121375 DOI: 10.1021/jacs.2c02216] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
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Here we present the
design of a highly enantioselective, catalytic
(4 + 3) cycloaddition of gem-dialkyl 2-indolyl alcohols
and dienolsilanes, enabled by strong and confined IDPi Lewis acids.
The method furnishes novel bicyclo[3.2.2]cyclohepta[b]indoles with up to three stereogenic centers, one of which is quaternary.
A broad substrate scope is accompanied by versatile downstream chemical
modifications. Density functional theory-supported mechanistic studies
shed light on the importance of the in situ generated silylium species
in an overall concerted yet asynchronous cycloaddition.
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Affiliation(s)
- Jie Ouyang
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Rajat Maji
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Benjamin Mitschke
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany.,Institute for Chemical Reaction Design and Discovery (WPI-ICRedd), Hokkaido University, Sapporo 001-0021, Japan
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6
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Zhou H, Zhou Y, Bae HY, Leutzsch M, Li Y, De CK, Cheng GJ, List B. Organocatalytic stereoselective cyanosilylation of small ketones. Nature 2022; 605:84-9. [PMID: 35508776 DOI: 10.1038/s41586-022-04531-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 02/08/2022] [Indexed: 12/31/2022]
Abstract
Enzymatic stereoselectivity has typically been unrivalled by most chemical catalysts, especially in the conversion of small substrates. According to the ‘lock-and-key theory’1,2, enzymes have confined active sites to accommodate their specific reacting substrates, a feature that is typically absent from chemical catalysts. An interesting case in this context is the formation of cyanohydrins from ketones and HCN, as this reaction can be catalysed by various classes of catalysts, including biological, inorganic and organic ones3–7. We now report the development of broadly applicable confined organocatalysts for the highly enantioselective cyanosilylation of aromatic and aliphatic ketones, including the challenging 2-butanone. The selectivity (98:2 enantiomeric ratio (e.r.)) obtained towards its pharmaceutically relevant product is unmatched by any other catalyst class, including engineered biocatalysts. Our results indicate that confined chemical catalysts can be designed that are as selective as enzymes in converting small, unbiased substrates, while still providing a broad scope. The development of confined organocatalysts for the enantioselective cyanosilylation of small, unbiased substrates, including 2-butanone, is shown to lead to catalysts that are as selective as enzymes, with excellent levels of control.
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7
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Weng ZZ, Xie J, Huang KX, Li JP, Long LS, Kong XJ, Zheng LS. Asymmetric Cyanosilylation of Aldehydes by a Lewis Acid/Base Synergistic Catalyst of Chiral Metal Clusters. Inorg Chem 2022; 61:4121-4129. [PMID: 35201748 DOI: 10.1021/acs.inorgchem.1c03916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal clusters with well-defined crystal structures are extremely useful for studying the synergistic catalytic effects and associated catalytic mechanisms. In this study, two pairs of chiral lanthanide-transition metal clusters (R)/(S)-Co3Ln2 (Ln = Tb or Dy) were synthesized using Schiff-base ligands [(R)- or (S)-H3L] with multiple Lewis base sites (O sites). The as-prepared (R)/(S)-Co3Ln2 chiral metal clusters exhibited good catalytic functionality in the asymmetric synthesis of chiral cyanohydrins, with high conversions of up to 99% and medium-to-high enantiomeric excess values of up to 78%. The catalysis process followed a mechanism in which the bifunctional metal clusters of (R)/(S)-Co3Ln2, containing Lewis acid sites and Lewis base sites, simultaneously activated the aldehydes and trimethylsilyl cyanide, respectively. Consequently, synergistic catalysis was realized. The enantioselectivity of the different aldehydes and stereochemical configuration of the resulting products are attributed to the formation of a steric chiral pocket via the external chiral ligands on the clusters. In addition, heterogeneous asymmetric cyanosilylation using (R)/(S)-Co3Ln2 chiral metal clusters achieved high chemoselectivity and regioselectivity under mild conditions.
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Affiliation(s)
- Zhen-Zhang Weng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jing Xie
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kai-Xin Huang
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jun-Ping Li
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - La-Sheng Long
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xiang-Jian Kong
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Lan-Sun Zheng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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8
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Zhang Z, Liu Y, Wang Z, Ding K. Kinetic Insights into Cyanosilylation of Aldehydes Catalyzed by a Covalently Bridged Dinuclear (Salen)titanium Complex. ASIAN J ORG CHEM. [DOI: 10.1002/ajoc.202100795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Grossmann O, Maji R, Aukland MH, Lee S, List B. Katalytische asymmetrische Additionen von Enolsilanen an in situ erzeugte zyklische, aliphatische
N
‐Acyliminiumionen. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Oleg Grossmann
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Rajat Maji
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Miles H. Aukland
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Sunggi Lee
- Department of Emerging Materials Science Daegu Gyeongbuk Institute of Science and Technology (DGIST) 333, Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun Daegu (Republik Korea
| | - Benjamin List
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr (Germany)
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo 001-0021 Japan
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10
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Hu J, Cheng CS, Liu X, Ming X, Wei ZY, Li QG. Reaction mechanism of the green synthesis of glutaric acid. RSC Adv 2022; 12:2270-2275. [PMID: 35425245 PMCID: PMC8979085 DOI: 10.1039/d1ra08650b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 01/05/2022] [Indexed: 11/21/2022] Open
Abstract
In this study, the reaction mechanism underlying the green synthesis of glutaric acid was studied via joint test technology. Density functional theory calculations were used to verify the mechanism. Quantitative analysis of glutaric acid via infrared spectroscopy and HPLC was established. The linear correlation between the two methods was good, from 0.01 to 0.25 g mL-1. The analysis results of the two methods were consistent as the reaction progressed.
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Affiliation(s)
- Jie Hu
- Sinochem Safety Science Research (Shenyang) CO., LTD Shenyang 110870 Liaoning China
| | - Chun-Sheng Cheng
- Sinochem Safety Science Research (Shenyang) CO., LTD Shenyang 110870 Liaoning China
| | - Xuan Liu
- Sinochem Safety Science Research (Shenyang) CO., LTD Shenyang 110870 Liaoning China
| | - Xu Ming
- Sinochem Safety Science Research (Shenyang) CO., LTD Shenyang 110870 Liaoning China
| | - Zhen-Yun Wei
- Sinochem Safety Science Research (Shenyang) CO., LTD Shenyang 110870 Liaoning China
| | - Quan-Guo Li
- Sinochem Safety Science Research (Shenyang) CO., LTD Shenyang 110870 Liaoning China
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11
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List B, Grossmann O, Maji R, Aukland MH, Lee S. Catalytic Asymmetric Additions of Enol Silanes to in situ Generated Cyclic, Aliphatic N-Acyliminium Ions. Angew Chem Int Ed Engl 2021; 61:e202115036. [PMID: 34897932 PMCID: PMC9303265 DOI: 10.1002/anie.202115036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Indexed: 12/02/2022]
Abstract
Strong and confined imidodiphosphorimidate (IDPi) catalysts enable highly enantioselective substitutions of cyclic, aliphatic hemiaminal ethers with enol silanes. 2‐Substituted pyrrolidines, piperidines, and azepanes are obtained with high enantioselectivities, and the method displays a broad tolerance of various enol silane nucleophiles. Several natural products can be accessed using this methodology. Mechanistic studies support the intermediacy of non‐stabilized, cyclic N‐(exo‐acyl)iminium ions, paired with the confined chiral counteranion. Computational studies suggest transition states that explain the observed enantioselectivity.
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Affiliation(s)
- Benjamin List
- Max-Planck-Institut für Kohlenforschung, Homogenous Catalysis, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, GERMANY
| | - Oleg Grossmann
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Homogenous Catalysis, GERMANY
| | - Rajat Maji
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Homogeneous Catalysis, GERMANY
| | - Miles H Aukland
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Homogeneou Catalysis, GERMANY
| | - Sunggi Lee
- DGIST: Daegu Gyeongbuk Institute of Science and Technology, Department of Emerging Materials Science, KOREA, REPUBLIC OF
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12
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Xu PW, Cui XY, Chen C, Zhou F, Yu JS, Ao YF, Zhou J. Enantioselective Synthesis of C α-Tetrasubstituted N-Hydroxyl-α-amino Nitriles via Cyanation of Ketonitrones Using Me 2(CH 2Cl)SiCN. Org Lett 2021; 23:8471-8476. [PMID: 34644098 DOI: 10.1021/acs.orglett.1c03176] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Here, we report an unprecedented catalytic enantioselective cyanation of ketonitrones enabled by the bifunctional cyanating reagent Me2(CH2Cl)SiCN. This approach allows facile access to optically active N-hydroxyl-α-amino nitriles that are of high synthetic value but difficult to acquire by other methods. The use of bifunctional cyanating reagent Me2(CH2Cl)SiCN not only achieves an enantioselectivity higher than that with TMSCN but also enables various diversification reactions of the resulting silylated adducts. This represents the first enantioselective catalytic nucleophilic addition reaction of unactivated ketone-derived nitrones, exhibiting the potential of such tetrasubstituted C═N bonds for asymmetric synthesis of N-hydroxy α-amino acids and other N-hydroxy tertiary amines.
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Affiliation(s)
- Peng-Wei Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Process and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China
| | - Xiao-Yuan Cui
- Shanghai Key Laboratory of Green Chemistry and Chemical Process and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China
| | - Chen Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Process and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China
| | - Feng Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China
| | - Jin-Sheng Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Process and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China
| | - Yu-Fei Ao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China.,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China
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13
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Tanaka M, Hosoya M, Manaka A, Tsuno N. Synthesis of a dipeptide by integrating a continuous flow reaction and continuous crystallization. Chem Eng Res Des 2021; 175:259-71. [DOI: 10.1016/j.cherd.2021.09.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Thirupathi G, Ashok E, Suresh Kumar A, Ramachary DB. Parts-per-Million-Level, Catalytic [3+2]-Annulations for the Asymmetric Synthesis of Methanobenzo[7]annulenes. Chemistry 2021; 27:18033-18038. [PMID: 34677886 DOI: 10.1002/chem.202103254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 09/08/2021] [Indexed: 12/11/2022]
Abstract
3-Alkyl-lawsones selectively reacted with α-alkyl-nitroethylenes under 500 parts-per-million (ppm) quinine-NH-thiourea-catalysis to furnish the chiral methanobenzo[7]annulenes in up to >99 % ee with >20 : 1 dr and TON up to 1820 through tandem Michael/Henry [3+2]-annulations. These asymmetric ppm-level, catalytic tandem [3+2]-annulations would be highly inspirational for the design of many more ppm-level organocatalytic reactions, and at the same time these final molecules are basic skeletons of antibiotics.
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Affiliation(s)
- Guguloth Thirupathi
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India
| | - Etikala Ashok
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India
| | - A Suresh Kumar
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India
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15
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Tsygankov AA, Chusov D. Straightforward Access to High-Performance Organometallic Catalysts by Fluoride Activation: Proof of Principle on Asymmetric Cyanation, Asymmetric Michael Addition, CO 2 Addition to Epoxide, and Reductive Alkylation of Amines by Tetrahydrofuran. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03785] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Alexey A. Tsygankov
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova Street 28, Moscow 119991, Russian Federation
| | - Denis Chusov
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova Street 28, Moscow 119991, Russian Federation
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16
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Antenucci A, Dughera S, Renzi P. Green Chemistry Meets Asymmetric Organocatalysis: A Critical Overview on Catalysts Synthesis. ChemSusChem 2021; 14:2785-2853. [PMID: 33984187 PMCID: PMC8362219 DOI: 10.1002/cssc.202100573] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/30/2021] [Indexed: 05/30/2023]
Abstract
Can green chemistry be the right reading key to let organocatalyst design take a step forward towards sustainable catalysis? What if the intriguing chemistry promoted by more engineered organocatalysts was carried on by using renewable and naturally occurring molecular scaffolds, or at least synthetic catalysts more respectful towards the principles of green chemistry? Within the frame of these questions, this Review will tackle the most commonly occurring organic chiral catalysts from the perspective of their synthesis rather than their employment in chemical methodologies or processes. A classification of the catalyst scaffolds based on their E factor will be provided, and the global E factor (EG factor) will be proposed as a new green chemistry metric to consider, also, the synthetic route to the catalyst within a given organocatalytic process.
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Affiliation(s)
- Achille Antenucci
- Department of ChemistryUniversity of TurinVia Pietro Giuria, 710125TurinItaly
- NIS Interdeprtmental CentreINSTM Reference CentreUniversity of TurinVia Gioacchino Quarello 15/A10135TurinItaly
| | - Stefano Dughera
- Department of ChemistryUniversity of TurinVia Pietro Giuria, 710125TurinItaly
| | - Polyssena Renzi
- Department of ChemistryUniversity of TurinVia Pietro Giuria, 710125TurinItaly
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17
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Keshavarz M, Dekamin MG, Mamaghani M, Nikpassand M. Tetramethylguanidine-functionalized melamine as a multifunctional organocatalyst for the expeditious synthesis of 1,2,4-triazoloquinazolinones. Sci Rep 2021; 11:14457. [PMID: 34262059 PMCID: PMC8280119 DOI: 10.1038/s41598-021-91463-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 11/13/2020] [Accepted: 05/27/2021] [Indexed: 11/08/2022] Open
Abstract
Novel nano-ordered 1,1,3,3-tetramethylguanidine-functionalized melamine (Melamine@TMG) organocatalyst was prepared and adequately identified by various techniques including FTIR, EDX, XRD and SEM spectroscopic or microscopic methods as well as TGA and DTG analytical methods. The Melamine@TMG, as an effective multifunctional organocatalyst, was found to promote smoothly the three-component synthesis of 1,2,4-triazoloquinazolinone derivatives using cyclic dimedone, 3-amino-1,2,4-triazole and different benzaldehyde derivatives in EtOH at 40 °C. This practical method afforded the desired products in high to excellent yields (86-99%) and short reaction times (10-25 min). The main advantages of this new method are the use of heterogeneous multifunctional nanocatalyst, simple work-up procedure with no need for chromatographic purification, highly selective conversion of substrates and recyclability of the catalyst, which could be used in five consecutive runs with only a small decrease in its activity.
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Affiliation(s)
- Mahnoush Keshavarz
- Department of Chemistry, Faculty of Basic Sciences, Rasht Branch , Islamic Azad University, P.O. Box 41335-3516, Rasht, Iran
| | - Mohammad G Dekamin
- Department of Chemistry, Iran University of Science and Technology, 16846-13114, Tehran, Iran.
| | - Manouchehr Mamaghani
- Department of Chemistry, Faculty of Sciences, University of Guilan, P.O. Box 41335-1914, Rasht, Iran.
| | - Mohammad Nikpassand
- Department of Chemistry, Faculty of Basic Sciences, Rasht Branch , Islamic Azad University, P.O. Box 41335-3516, Rasht, Iran
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18
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Affiliation(s)
- Chengcheng Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Xiao-Yong Chang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Luqiong Huo
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Haibo Tan
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Xiangyou Xing
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chen Xu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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19
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Affiliation(s)
- Guoli He
- Freie Universität Berlin Institute of Chemistry and Biochemistry Takustrasse 3 14195 Berlin Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Mathias Christmann
- Freie Universität Berlin Institute of Chemistry and Biochemistry Takustrasse 3 14195 Berlin Germany
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20
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Abstract
A complementary dual carbonyl activation strategy for the synthesis of polycyclic alkaloids has been developed. Successful applications include the synthesis of tetracyclic alkaloids harmalanine and harmalacinine, pentacyclic indoloquinolizidine alkaloid nortetoyobyrine, and octacyclic β-carboline alkaloid peganumine A. The latter synthesis features a protecting-group-free assembly and an asymmetric disulfonimide-catalyzed cyclization. Furthermore, formal syntheses of hirsutine, deplancheine, 10-desbromoarborescidine A, and oxindole alkaloids rhynchophylline and isorhynchophylline have been achieved. Finally, a concise synthesis of berberine alkaloid ilicifoline B was completed.
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Affiliation(s)
- Guoli He
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustrasse 3, 14195, Berlin, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Mathias Christmann
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustrasse 3, 14195, Berlin, Germany
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21
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Abstract
![]()
Practical, efficient,
and general methods for the diversification
of N-heterocycles have been a recurrent goal in chemical
synthesis due to the ubiquitous influence of these motifs within bioactive
frameworks. Here, we describe a direct, catalytic, and selective functionalization
of azines via silylium activation. Our catalyst design enables mild
conditions and a remarkable functional group tolerance in a one-pot
setup.
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Affiliation(s)
- Carla Obradors
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470, Germany
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22
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Abstract
The history of silyl cations has all the makings of a drama but with a happy ending. Being considered reactive intermediates impossible to isolate in the condensed phase for decades, their actual characterization in solution and later in solid state did only fuel the discussion about their existence and initially created a lot of controversy. This perception has completely changed today, and silyl cations and their donor-stabilized congeners are now widely accepted compounds with promising use in synthetic chemistry. This review provides a comprehensive summary of the fundamental facts and principles of the chemistry of silyl cations, including reliable ways of their preparation as well as their physical and chemical properties. The striking features of silyl cations are their enormous electrophilicity and as such reactivity as super Lewis acids as well as fluorophilicity. Known applications rely on silyl cations as reactants, stoichiometric reagents, and promoters where the reaction success is based on their steady regeneration over the course of the reaction. Silyl cations can even be discrete catalysts, thereby opening the next chapter of their way into the toolbox of synthetic methodology.
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Affiliation(s)
- Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
| | - Lena Albers
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26129 Oldenburg, Germany
| | - Lars Süsse
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
| | - Sebastian Keess
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
| | - Thomas Müller
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26129 Oldenburg, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
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23
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Abstract
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We report here a
scalable, catalytic one-pot approach to enantiopure
and unmodified β2-amino acids. A newly developed
confined imidodiphosphorimidate (IDPi) catalyzes a broadly applicable
reaction of diverse bis-silyl ketene acetals with a silylated aminomethyl
ether, followed by hydrolytic workup, to give free β2-amino acids in high yields, purity, and enantioselectivity. Importantly,
both aromatic and aliphatic β2-amino acids can be
obtained using this method. Mechanistic studies are consistent with
the aminomethylation to proceed via silylium-based asymmetric counteranion-directed
catalysis (Si-ACDC) and a transition state to explain the enantioselectivity
is suggested on the basis of density functional theory calculation.
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Affiliation(s)
- Chendan Zhu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Francesca Mandrelli
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Rajat Maji
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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24
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Wang YX, Wang HM, Meng P, Song DX, Hou JJ, Zhang XM. An uncoordinated tertiary nitrogen based tricarboxylate calcium network with Lewis acid-base dual catalytic sites for cyanosilylation of aldehydes. Dalton Trans 2021; 50:1740-1745. [PMID: 33459307 DOI: 10.1039/d0dt03747h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design and utilization of dual sites for synergistic catalysts has been recognised as an efficient method towards high-efficiency catalysis in the cyanosilylation of aldehydes, which gives key intermediates for the synthesis of a number of valuable natural and pharmaceutical compounds. However, most of the reported dual-site catalysts for this reaction were homogeneous, accompanied by potential deactivation through internal complexation of the dual sites. Herein, by the rational selection of an uncoordinated tertiary nitrogen based tricarboxylic ligand (tris[(4-carboxyl)-phenylduryl]amine, H3TCBPA), a new three-dimensional calcium-based metal-organic framework (MOF), Ca3(TCBPA)2(DMA)2(H2O)2 (1, where TCBPA = ionized tris[(4-carboxyl)-phenylduryl]amine and DMA = N,N-dimethylacetamide), possessing accessible dual catalytic sites, Lewis-basic N and Lewis-acidic Ca, has been designed and constructed by a one-pot solvothermal reaction. As expected, 1 is capable of dually and heterogeneously catalysing the cyanosilylation of aldehydes at room temperature, and can be reused for at least 6 runs with a maximum turnover number (TON) of 1301, which is superior to most reported cases. Additionally, 1 shows CO2 adsorption ability and conversion with epoxides, which is beneficial for the establishment of a sustainable society.
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Affiliation(s)
- Ying-Xia Wang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China.
| | - Hui-Min Wang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China.
| | - Pan Meng
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China.
| | - Dong-Xia Song
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China.
| | - Juan-Juan Hou
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China.
| | - Xian-Ming Zhang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China.
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25
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Juhl M, Petersen AR, Lee JW. CO 2 -Enabled Cyanohydrin Synthesis and Facile Iterative Homologation Reactions*. Chemistry 2021; 27:228-232. [PMID: 32812672 DOI: 10.1002/chem.202003623] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 08/05/2020] [Revised: 08/18/2020] [Indexed: 01/06/2023]
Abstract
Thermodynamic and kinetic control of a chemical process is the key to access desired products and states. Changes are made when a desired product is not accessible; one may manipulate the reaction with additional reagents, catalysts and/or protecting groups. Here we report the use of carbon dioxide to accelerate cyanohydrin synthesis under neutral conditions with an insoluble cyanide source (KCN) without generating toxic HCN. Under inert atmosphere, the reaction is essentially not operative due to the unfavored equilibrium. The utility of CO2 -mediated selective cyanohydrin synthesis was further showcased by broadening Kiliani-Fischer synthesis under neutral conditions. This protocol offers an easy access to a variety of polyols, cyanohydrins, linear alkylnitriles, by simply starting from alkyl- and arylaldehydes, KCN and an atmospheric pressure of CO2 .
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Affiliation(s)
- Martin Juhl
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Allan R Petersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Ji-Woong Lee
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
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26
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Yang HS, Macha L, Ha HJ, Yang JW. Functionalisation of esters via 1,3-chelation using NaO tBu: mechanistic investigations and synthetic applications. Org Chem Front 2021. [DOI: 10.1039/d0qo01135e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unusual nucleophilic behavior of a metal t-butoxide in a transesterification reaction was demonstrated by NMR and real-time IR spectroscopies and deuterium-labeling experiments.
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Affiliation(s)
- Hye Sung Yang
- Department of Energy Science
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
| | - Lingamurthy Macha
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin 17035
- Republic of Korea
| | - Hyun-Joon Ha
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin 17035
- Republic of Korea
| | - Jung Woon Yang
- Department of Energy Science
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
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27
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Abstract
Since the emergence of pseudo-C2-symmetric chiral phosphoric acids (CPA), much work has been done to utilize these systems in stereoselective, organocatalytic processes. Despite the success in this field, reasonably basic substrates such as imines are often required to achieve appreciable activation. In order to access a wider variety of potential reaction partners, many related organocatalysts with enhanced Brønsted acidity have since been developed. Chiral disulfonimides (DSIs) have materialized as one such powerful class of organocatalysts and have been shown to expand the list of potential substrates to include aldehydes and ketones via Brønsted, Lewis, or bifunctional acid activation. This versatility renders DSIs amenable to an impressive scope of reaction types, typically with remarkable stereoselectivity induced by asymmetric counteranion-directed catalysis (ACDC). This review serves to provide a complete analysis of the successful applications, mechanistic insights, and unmet challenges exhibited to date in DSI-catalyzed and -assisted processes.
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Affiliation(s)
- Meghan C Benda
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
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28
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Zhou H, Bae HY, Leutzsch M, Kennemur JL, Bécart D, List B. The Silicon-Hydrogen Exchange Reaction: A Catalytic σ-Bond Metathesis Approach to the Enantioselective Synthesis of Enol Silanes. J Am Chem Soc 2020; 142:13695-13700. [PMID: 32786813 PMCID: PMC7426905 DOI: 10.1021/jacs.0c06677] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The use of chiral enol silanes in fundamental transformations such as Mukaiyama aldol, Michael, and Mannich reactions as well as Saegusa-Ito dehydrogenations has enabled the chemical synthesis of enantiopure natural products and valuable pharmaceuticals. However, accessing these intermediates in high enantiopurity has generally required the use of either stoichiometric chiral precursors or stoichiometric chiral reagents. We now describe a catalytic approach in which strongly acidic and confined imidodiphosphorimidates (IDPi) catalyze highly enantioselective interconversions of ketones and enol silanes. These "silicon-hydrogen exchange reactions" enable access to enantiopure enol silanes via tautomerizing σ-bond metatheses, either in a deprotosilylative desymmetrization of ketones with allyl silanes as the silicon source or in a protodesilylative kinetic resolution of racemic enol silanes with a carboxylic acid as the silyl acceptor.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.,Department of Chemistry, Sungkyunkwan University, 16419, Suwon, Korea
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Jennifer L Kennemur
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Diane Bécart
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
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29
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Hosoya M, Nishijima S, Kurose N. Management of the Heat of Reaction under Continuous Flow Conditions Using In-Line Monitoring Technologies. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00109] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Masahiro Hosoya
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Shogo Nishijima
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Noriyuki Kurose
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
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30
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Affiliation(s)
- Wen-Biao Wu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, People’s Republic of China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, Shanghai 200032, People’s Republic of China
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31
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Goswami P, Park JH, Bae HY. Water plays a crucial role: Small molecule catalyzed C–C/C–X bond forming reactions using organosilicon reagents under “wet” conditions. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Abstract
Kinetic study of organic reactions, especially multistep catalytic reactions, is crucial to in-depth understanding of reaction mechanisms. Here we report our kinetic study on the chiral disulfonimide-catalyzed cyanosilylation of an aldehyde, which revealed that two molecules of TMSCN are involved in the rate-determining C–C bond-forming step. In addition, the apparent activation energy, enthalpy of activation, and entropy of activation were deduced through a study of the temperature dependence of the reaction rates. More importantly, a novel and efficient method that makes use of the progress rates was developed to treat kinetic data obtained by continuous monitoring of the progress of a reaction by in situ FTIR.
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Affiliation(s)
- Zhipeng Zhang
- School of Chemistry and Molecular Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science & Technology
- Max-Planck-Institut für Kohlenforschung
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33
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Nie YM, Li SH, Lin MY, Yan J. A micro-environment tuning approach for enhancing the catalytic capabilities of lanthanide containing polyoxometalate in the cyanosilylation of ketones. Chem Commun (Camb) 2020; 56:3809-3812. [PMID: 32129778 DOI: 10.1039/d0cc01216e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The as-synthesized (TBA)8H5[Nd(SiW11O39)2] manifested high catalytic activity for cyanosilylation of ketones, and its catalytic activity could be improved further through rational design of the reaction micro-environment beyond the molecular level, and the corresponding mechanism has been systematically studied.
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Affiliation(s)
- Yan-Mei Nie
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Sang-Hao Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Ming-Yuan Lin
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Jun Yan
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China. and Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha, 410083, P. R. China
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34
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Hajra S, Laskar S, Jana B. Organocatalytic Enantioselective Mukaiyama-Mannich Reaction of Isatin-Derived Ketimines for the Synthesis of Oxindolyl-β 3, 3 -Amino Acid Esters. Chemistry 2019; 25:14688-14693. [PMID: 31479157 DOI: 10.1002/chem.201903512] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 08/01/2019] [Indexed: 12/18/2022]
Abstract
Mukaiyama-Mannich reactions of ester enolate equivalents with aldimines have been elegantly used for the asymmetric synthesis of β-amino acids; nevertheless, the corresponding asymmetric reaction employing ketimines are unexplored. Herein, the first organocatalytic enantioselective Mukaiyama-Mannich reaction employing isatin-derived ketimines with unsubstituted silyl ketene acetals is disclosed towards the scalable synthesis of 2-oxoindolinyl-β3, 3 -amino acid esters at room temperature with excellent enantioselectivities (ee >99.5 %). Ultra-low catalyst loadings (as low as 250 ppm) could be used for the quantitative product formation with high enantiopurity. The synthetic utility of this protocol has been showcased in the short formal synthesis of pharmaceutically demanded (+)-AG-041R, a potent gastrin/CCK-B receptor antagonist.
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Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, 226014, India
| | - Sujay Laskar
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, 226014, India
| | - Bibekananda Jana
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, 226014, India.,Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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35
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Affiliation(s)
- Xing‐Ping Zeng
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| | - Jun‐Chao Sun
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| | - Chao Liu
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| | - Cong‐Bin Ji
- Jiangxi Provincial Research of Targeting Pharmaceutical Engineering TechnologyShangrao Normal University Shangrao Jiangxi 334001 People's Republic of China
| | - Yi‐Yuan Peng
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
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36
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Affiliation(s)
- Tomoya Kanda
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Asuka Naraoka
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Hiroshi Naka
- Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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37
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Schreyer L, Kaib PSJ, Wakchaure VN, Obradors C, Properzi R, Lee S, List B. Confined acids catalyze asymmetric single aldolizations of acetaldehyde enolates. Science 2018; 362:216-219. [DOI: 10.1126/science.aau0817] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 08/07/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Lucas Schreyer
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Philip S. J. Kaib
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Vijay N. Wakchaure
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Carla Obradors
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Roberta Properzi
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
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38
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Gatzenmeier T, Turberg M, Yepes D, Xie Y, Neese F, Bistoni G, List B. Scalable and Highly Diastereo- and Enantioselective Catalytic Diels–Alder Reaction of α,β-Unsaturated Methyl Esters. J Am Chem Soc 2018; 140:12671-12676. [DOI: 10.1021/jacs.8b07092] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tim Gatzenmeier
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Mathias Turberg
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Diana Yepes
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Youwei Xie
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Giovanni Bistoni
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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39
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Alvim HGO, Pinheiro DLJ, Carvalho-Silva VH, Fioramonte M, Gozzo FC, da Silva WA, Amarante GW, Neto BAD. Combined Role of the Asymmetric Counteranion-Directed Catalysis (ACDC) and Ionic Liquid Effect for the Enantioselective Biginelli Multicomponent Reaction. J Org Chem 2018; 83:12143-12153. [DOI: 10.1021/acs.joc.8b02101] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Haline G. O. Alvim
- Laboratory of Medicinal and Technological Chemistry, University of Brasília, Chemistry Institute (IQ-UnB), Campus Universitário Darcy Ribeiro, P.O. Box 4478, Brasília, Distrito Federal 70904-970, Brazil
| | - Danielle L. J. Pinheiro
- Chemistry Department, Federal University of Juiz de Fora Rua José Lourenço Kelmer, Campus Universitário São Pedro, Juiz de Fora, Minas Gerais 36036-900, Brazil
| | - Valter H. Carvalho-Silva
- Grupo de Química Teórica e Estrutural de Anápolis, Unidade Universitária de Ciências Exatas e Tecnológicas, Universidade Estadual de Goiás, P.O. Box 459, Anápolis, Goiás 75001-970, Brazil
| | - Mariana Fioramonte
- Institute of Chemistry, University of Campinas (Unicamp), Campinas, São Paulo 13083-861, Brazil
| | - Fabio C. Gozzo
- Institute of Chemistry, University of Campinas (Unicamp), Campinas, São Paulo 13083-861, Brazil
| | - Wender A. da Silva
- Laboratory of Medicinal and Technological Chemistry, University of Brasília, Chemistry Institute (IQ-UnB), Campus Universitário Darcy Ribeiro, P.O. Box 4478, Brasília, Distrito Federal 70904-970, Brazil
| | - Giovanni W. Amarante
- Chemistry Department, Federal University of Juiz de Fora Rua José Lourenço Kelmer, Campus Universitário São Pedro, Juiz de Fora, Minas Gerais 36036-900, Brazil
| | - Brenno A. D. Neto
- Laboratory of Medicinal and Technological Chemistry, University of Brasília, Chemistry Institute (IQ-UnB), Campus Universitário Darcy Ribeiro, P.O. Box 4478, Brasília, Distrito Federal 70904-970, Brazil
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40
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Lee S, Bae HY, List B. Can a Ketone Be More Reactive than an Aldehyde? Catalytic Asymmetric Synthesis of Substituted Tetrahydrofurans. Angew Chem Int Ed Engl 2018; 57:12162-12166. [PMID: 30126072 DOI: 10.1002/anie.201806312] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [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: 06/01/2018] [Indexed: 11/06/2022]
Abstract
O-heterocycles bearing tetrasubstituted stereogenic centers are prepared via catalytic chemo- and enantioselective nucleophilic additions to ketoaldehydes, in which the ketone reacts preferentially over the aldehyde. Five- and six-membered rings with both aromatic and aliphatic substituents, as well as an alkynyl substituent, are obtained. Moreover, 2,2,5-trisubstituted and 2,2,5,5-tetrasubstituted tetrahydrofurans are synthesized with excellent stereoselectivities. Additionally, the synthetic utility of the described method is demonstrated with a three-step synthesis of the side chain of anhydroharringtonine.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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41
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Lee S, Bae HY, List B. Kann ein Keton reaktiver als ein Aldehyd sein? Katalytische asymmetrische Synthese von substituierten Tetrahydrofuranen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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42
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Bhowmick S, Zhang L, Ouyang G, Liu M. Self-Assembly of Amphiphilic Dipeptide with Homo- and Heterochiral Centers and Their Application in Asymmetric Aldol Reaction. ACS Omega 2018; 3:8329-8336. [PMID: 31458965 PMCID: PMC6644911 DOI: 10.1021/acsomega.8b00852] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/13/2018] [Indexed: 06/09/2023]
Abstract
Chiral self-assembly has drawn increasing interest in supramolecular chemistry. Here, we have designed amphiphilic l-Pro-l-Glu and l-Pro-d-Glu dipeptides and investigated their chiral self-assembly as well as asymmetric catalytic performance to disclose the synergistic effect of two stereogenic centers in the self-assembly and catalysis. It was found that both of the diastereomeric dipeptides can easily self-assemble into organogels with nanofibers. When these nanofibers were used as a catalyst for the asymmetric aldol reactions, enhanced enantioselectivity was obtained compared with their molecular state. Moreover, the L-L isomer assemblies showed higher enantioselectivity than the L-D isomer. It was revealed that both the supramolecular chirality of the nanofiber and the chiral catalytic site of l-proline played important roles in the asymmetric catalysis. In addition, the synergistic effect of two homochiral centers led to more efficient supramolecular catalysis that the L-L assemblies showed high yields (up to 97%), anti-diastereoselectivity (up to 99%), and excellent enantioselectivity (up to >99%).
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Affiliation(s)
- Sudipto Bhowmick
- Beijing
National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory
of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun Beiyijie No. 2, Haidian, Beijing 100190, P. R.
China
| | - Li Zhang
- Beijing
National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory
of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun Beiyijie No. 2, Haidian, Beijing 100190, P. R.
China
| | - Guanghui Ouyang
- Beijing
National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory
of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun Beiyijie No. 2, Haidian, Beijing 100190, P. R.
China
| | - Minghua Liu
- Beijing
National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory
of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun Beiyijie No. 2, Haidian, Beijing 100190, P. R.
China
- National
Center for Nanoscience and Technology, Zhongguancun Beiyitiao No. 11,
Haidian, Beijing 100190, P. R. China
- Collaborative
Innovation Center of Chemical Science and Engineering, Tianjin 300072, P. R. China
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43
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Rubial B, Ballesteros A, González JM. Silylium-Catalyzed Carbon-Carbon Coupling of Alkynylsilanes with (2-Bromo-1-methoxyethyl)arenes: Alternative Approaches. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800777] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Belén Rubial
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; C/ Julián Clavería 8 33006 Oviedo Spain
| | - Alfredo Ballesteros
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; C/ Julián Clavería 8 33006 Oviedo Spain
| | - José M. González
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; C/ Julián Clavería 8 33006 Oviedo Spain
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44
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Yu QW, Wu LP, Kang TC, Xie J, Sha F, Wu XY. Enantioselective Cyanosilylation of α,α-Dialkoxy Ketones by Using Phosphine-Thiourea Dual-Reagent Catalysis. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qi-Wen Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Lu-Ping Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Tian-Chen Kang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Jin Xie
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Feng Sha
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Xin-Yan Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
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45
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Bae HY, Höfler D, Kaib PSJ, Kasaplar P, De CK, Döhring A, Lee S, Kaupmees K, Leito I, List B. Approaching sub-ppm-level asymmetric organocatalysis of a highly challenging and scalable carbon–carbon bond forming reaction. Nat Chem 2018; 10:888-894. [DOI: 10.1038/s41557-018-0065-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 04/11/2018] [Indexed: 01/25/2023]
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46
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Abstract
The synthesis and characterization of silicon Lewis acid complexes that incorporate highly electron-deficient cyclopentadienes is reported. Several pentacarboxycyclopentadienyl and monocarboxytetracyanocyclopentadienyl complexes were prepared. A comparison of their reactivities for catalysis of the allylation of an electron-deficient benzaldehyde was established. The use of a monocarboxytetracyano silylium donor was shown to be effective for the allylation or arylation of a variety of electrophiles via an anion abstraction pathway.
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Affiliation(s)
- M Alex Radtke
- Department of Chemistry , Columbia University , New York , NY 10027 , USA
| | - Tristan H Lambert
- Department of Chemistry , Columbia University , New York , NY 10027 , USA.,Department of Chemistry and Chemical Biology , Cornell University , Ithaca , NY 14853 , USA .
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47
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Kurihara T, Satake S, Hatano M, Ishihara K, Yoshino T, Matsunaga S. Synthesis of 1,1′-Spirobiindane-7,7′-Disulfonic Acid and Disulfonimide: Application for Catalytic Asymmetric Aminalization. Chem Asian J 2018; 13:2378-2381. [DOI: 10.1002/asia.201800341] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/05/2018] [Indexed: 01/26/2023]
Affiliation(s)
- Takumaru Kurihara
- Faculty of Pharmaceutical Sciences; Hokkaido University, Kita-12 Nishi-6; Kita-ku Sapporo 060-0812 Japan
| | - Shun Satake
- Faculty of Pharmaceutical Sciences; Hokkaido University, Kita-12 Nishi-6; Kita-ku Sapporo 060-0812 Japan
| | - Manabu Hatano
- Graduate School of Engineering; Nagoya University; Furo-cho Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering; Nagoya University; Furo-cho Chikusa Nagoya 464-8603 Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences; Hokkaido University, Kita-12 Nishi-6; Kita-ku Sapporo 060-0812 Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences; Hokkaido University, Kita-12 Nishi-6; Kita-ku Sapporo 060-0812 Japan
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48
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Li JL, Fu L, Wu J, Yang KC, Li QZ, Gou XJ, Peng C, Han B, Shen XD. Highly enantioselective synthesis of fused bicyclic dihydropyranones via low-loading N-heterocyclic carbene organocatalysis. Chem Commun (Camb) 2018; 53:6875-6878. [PMID: 28604911 DOI: 10.1039/c7cc02921g] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly diastereo and enantioselective [4+2] cycloadditions have been achieved between pyrrolidone-derived cyclic enones and α-haloaldehydes under mild conditions. Relying on extremely reactive in-situ generated chiral N-heterocyclic carbenes, this stereoselective annulation proceeds efficiently even on the gram scale with the catalyst loading as low as 0.025 mol% (250 ppm). A variety of cis-substituted bicyclic dihydropyranones can be produced in up to 96% yield with up to >99% ee. In addition, simple, inexpensive linear aldehydes such as n-propanal can be used directly in asymmetric cycloadditions via oxidative N-heterocyclic carbene organocatalysis with low catalyst loading. This method may provide an economical and practical approach for the asymmetric synthesis of medicinally relevant molecules.
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Affiliation(s)
- Jun-Long Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, P. R. China.
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49
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Gatzenmeier T, Kaib PSJ, Lingnau JB, Goddard R, List B. Die katalytische, asymmetrische Mukaiyama-Michael-Reaktion von Silylketenacetalen mit α,β-ungesättigten Methylestern. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712088] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Tim Gatzenmeier
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Philip S. J. Kaib
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Julia B. Lingnau
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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50
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Gatzenmeier T, Kaib PSJ, Lingnau JB, Goddard R, List B. The Catalytic Asymmetric Mukaiyama-Michael Reaction of Silyl Ketene Acetals with α,β-Unsaturated Methyl Esters. Angew Chem Int Ed Engl 2018; 57:2464-2468. [DOI: 10.1002/anie.201712088] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Tim Gatzenmeier
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Philip S. J. Kaib
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Julia B. Lingnau
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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