1
|
Liu XY, Yang YL, Dang Y, Marek I, Zhang FG, Ma JA. Tetrazole Diversification of Amino Acids and Peptides via Silver-Catalyzed Intermolecular Cycloaddition with Aryldiazonium Salts. Angew Chem Int Ed Engl 2023; 62:e202304740. [PMID: 37212541 DOI: 10.1002/anie.202304740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 05/23/2023]
Abstract
Selective structural modification of amino acids and peptides is a central strategy in organic chemistry, chemical biology but also in pharmacology and material science. In this context, the formation of tetrazole rings, known to possess significant therapeutic properties, would expand the chemical space of unnatural amino acids but has received less attention. In this study, we demonstrated that the classic unimolecular Wolff rearrangement of α-amino acid-derived diazoketones could be replaced by a faster intermolecular cycloaddition reaction with aryldiazonium salts under identical practical conditions. This strategy provides an efficient synthetic platform that could transform proteinogenic α-amino acids into a plethora of unprecedented tetrazole-decorated amino acid derivatives with preservation of the stereocenters. Density functional theory studies shed some light on the reaction mechanism and provided information regarding the origins of the chemo- and regioselectivity. Furthermore, this diazo-cycloaddition protocol was applied to construct tetrazole-modified peptidomimetics and drug-like amino acid derivatives.
Collapse
Affiliation(s)
- Xuan-Yu Liu
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Yi-Lin Yang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Yanfeng Dang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Ilan Marek
- Schulich Faculty of Chemistry and the Resnick Sustainability Center for Catalysis, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Fa-Guang Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| |
Collapse
|
2
|
Ma N, Zhou L, Li Y, Wu H, Li S, Zhang G. Theoretical Insight into the Mechanism of Cu(I)-Catalyzed [2 + 2 + 1] Cycloaddition to β-Pyrrolinones: Azaheterocycle Formation and Assisted Dehydrogenation with Solvent MeNO 2. J Org Chem 2023. [PMID: 37467204 DOI: 10.1021/acs.joc.3c00727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
The construction of multisubstituted β-pyrrolinones from simple starting materials remains a great challenge. Recently, a novel Cu(I)-catalyzed [2 + 2 + 1] cycloaddition reaction was developed for rapid access to fully substituted β-pyrrolinones, which are difficult to synthesize through traditional methods as this approach may involve unusual C-nucleophilic addition of enamines and umpolung of imines. Elucidating the reaction mechanism may inspire the development of new methodologies via the unusual C-nucleophilic addition of enamines and imines. However, the reaction mechanism is still unclear because none of the intermediates was observed during the reaction process. In this work, we employed theoretical and computational chemistry to investigate the possible pathway. Finally, the calculated results indicate that ketene formed by the Wolff rearrangement of α-diazo-β-ketoester reacts with enamine formed by the addition of alkynes and amine, affording the five-membered azaheterocycle, and this process involves the formation of a six-membered ring intermediate and sequential isomerization, and the further dehydrogenation needs to be assisted with solvent MeNO2.
Collapse
Affiliation(s)
- Nana Ma
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, Xinxiang, Henan, 453007, China
| | - Lanxin Zhou
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, Xinxiang, Henan, 453007, China
| | - Yameng Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, Xinxiang, Henan, 453007, China
| | - Hao Wu
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, Xinxiang, Henan, 453007, China
| | - Shujun Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, Xinxiang, Henan, 453007, China
| | - Guisheng Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, Xinxiang, Henan, 453007, China
| |
Collapse
|
3
|
Pei S, Yang J, Wang J, Yuan K, Li Z. Ultrasound-assisted synthesis of β-enaminone derivatives via Tin(Ⅳ)-catalyzed addition reaction from β-dicarbonyl compounds with nitriles. LETT ORG CHEM 2021. [DOI: 10.2174/1570178619666211221141854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
An efficient and eco-friendly approach for the synthesis of β-enaminone derivatives is described, which is through the addition of nitriles with β-dicarbonyl compounds under ultrasound irradiation condition at room temperature. The scope and limitation of this strategy are also discussed. A variety of substituted amides can be obtained in moderate to good yields. We hope that this protocol for the efficient synthesis of β-enaminones will offer insights in further investigations.
Collapse
Affiliation(s)
- Shuchen Pei
- Key Laboratory of Industrial Fermentation Microorganism, Chongqing University of Science and Technology, Chongqing, China
| | - Jinhua Yang
- Key Laboratory of Industrial Fermentation Microorganism, Chongqing University of Science and Technology, Chongqing, China
| | - Jieyu Wang
- Key Laboratory of Industrial Fermentation Microorganism, Chongqing University of Science and Technology, Chongqing, China
| | - Kangyao Yuan
- Key Laboratory of Industrial Fermentation Microorganism, Chongqing University of Science and Technology, Chongqing, China
| | - Ziqiang Li
- Key Laboratory of Industrial Fermentation Microorganism, Chongqing University of Science and Technology, Chongqing, China
| |
Collapse
|
4
|
Nahzomi HT, Divsar F. Potential Energy Surfaces of Vinylogous Wolff Rearrangement: NBO Analysis and Molecular Dynamic Simulation. ChemistryOpen 2021; 10:949-953. [PMID: 34363326 PMCID: PMC8485804 DOI: 10.1002/open.202100049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/12/2021] [Indexed: 11/07/2022] Open
Abstract
The potential energy surfaces of the Vinylogous Wolff Rearrangement, an alternative process for the Wolff Rearrangement that takes place β,γ-unsaturated diazoketones have been fully explored employing M062X model chemistry and in a complementary task by means of the CASSCF method. The NBO analysis has been invoked to reveal the alternations of orbital occupancies and their stabilization energies through some of the critical structures located on the pathways. The calculations establish a two steps process for each pathway involving a second higher energy transition state that seems likely to be the rate determining step in agreement with experimental results. Energy analysis indicates more feasibility of the pathway including diradical intermediate. The most striking feature of the study concerns the finding out a transition state providing a channel in between two pathways through interconversion of the two keys bicyclo[2.1.0]pentanone and diradical intermediates.
Collapse
Affiliation(s)
| | - Faten Divsar
- Department of ChemistryPayame Noor UniversityPO BOX19395-3697TehranIran
| |
Collapse
|
5
|
Wu H, Li X, Yan Z, Ma N, Song S, Zhang G, Jiao N. Cu(I)-Catalyzed [2 + 2 + 1] Cycloaddition of Amines, Alkynes, and Ketenes: An Umpolung and Regioselective Approach to Full-Substituted β-Pyrrolinones. Org Lett 2021; 23:762-766. [PMID: 33443435 DOI: 10.1021/acs.orglett.0c03991] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Described here is a Cu-catalyzed [2 + 2 + 1] modular synthesis of full-substituted β-pyrrolinones from simple amines, alkynes, and α-diazo-β-ketoesters. This approach involving the regioselective C-nucleophilic attack of enamines, uncommon C-nucleophilic addition to ketenes, and umpolung of imines enables the direct synthesis of full-substituted β-pyrrolinones, which were hardly constructed by traditional synthetic strategies.
Collapse
Affiliation(s)
- Hao Wu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.,State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
| | - Xinyao Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
| | - Zixi Yan
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
| | - Nana Ma
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
| | - Guisheng Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
| |
Collapse
|
6
|
Stojanović M, Bugarski S, Baranac-Stojanović M. Synthesis of 2,3-Dihydro-4-pyridones and 4-Pyridones by the Cyclization Reaction of Ester-Tethered Enaminones. J Org Chem 2020; 85:13495-13507. [PMID: 33092340 DOI: 10.1021/acs.joc.0c01537] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
2,3-Dihydro-4-pyridone skeleton is an important building block in organic synthesis because it features several reaction sites with nucleophilic or electrophilic properties. Herein, we disclose a method for its formation by intramolecular cyclization of ester-tethered enaminones, which can easily be synthesized from readily available materials, such as amines, activated alkynes, and activated alkenes. 2,3-Dihydro-4-pyridones have been isolated in 41-90% yields. We also demonstrate the transformation of these heterocycles into another important class of compounds, 4-pyridones, by utilizing 2,3,5,6-tetrachloro-p-benzoquinone (chloranil) as an oxidizing agent. The latter products were isolated in 65-94% yields.
Collapse
Affiliation(s)
- Milovan Stojanović
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy-Center for Chemistry, Njegoševa 12, P.O. Box 473, 11000 Belgrade, Serbia
| | - Slobodan Bugarski
- University of Belgrade-Faculty of Chemistry, Studentski trg 12-16, P.O. Box 158, 11000 Belgrade, Serbia
| | - Marija Baranac-Stojanović
- University of Belgrade-Faculty of Chemistry, Studentski trg 12-16, P.O. Box 158, 11000 Belgrade, Serbia
| |
Collapse
|
7
|
Luo W, Sun Z, Fernando EHN, Nesterov VN, Cundari TR, Wang H. Formal oxo- and aza-[3 + 2] reactions of α-enaminones and quinones: a double divergent process and the roles of chiral phosphoric acid and molecular sieves. Chem Sci 2020; 11:9386-9394. [PMID: 34094204 PMCID: PMC8162164 DOI: 10.1039/d0sc02078h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 07/07/2020] [Indexed: 11/21/2022] Open
Abstract
A double divergent process has been developed for the reaction of α-enaminones with quinones through facile manipulation of catalyst and additive, leading to structurally completely different products. The two divergent processes, which involve formal aza- and oxo-[3 + 2] cycloaddition reactions, are mediated by chiral phosphoric acid and molecular sieves, respectively. While inclusion of phosphoric acid in the reaction switched the reaction pathway to favor the efficient formation of a wide range of N-substituted indoles, addition of 4 Å molecular sieves to the reaction switched the reaction pathway again, leading to enantioselective synthesis of 2,3-dihydrobenzofurans in excellent yields and enantioselectivities under mild conditions. Studies in this work suggest that the chiral phosphoric acid acts to lower the transition state energy and promote the formation of amide intermediate for the formal aza-[3 + 2] cycloaddition and the molecular sieves serve to facilitate proton transfer for oxo-[3 + 2] cycloaddition. The reactivity of α-enaminones is also disclosed in this work.
Collapse
Affiliation(s)
- Weiwei Luo
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| | - Zhicheng Sun
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| | | | | | - Thomas R Cundari
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| | - Hong Wang
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| |
Collapse
|
8
|
R S R, Sugunan A, S R, Suresh CH, Rajendar G. A Method for the Preparation of β-Amino-α,β-unsaturated Carbonyl Compounds: Study of Solvent Effect and Mechanism. Org Lett 2020; 22:1040-1045. [PMID: 31990197 DOI: 10.1021/acs.orglett.9b04531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient method for the preparation of β-amino-α,β-unsaturated carbonyl compounds is demonstrated. Bench-stable sodium 3-oxo-enolates were prepared from carbonyl compounds, and reacted with amines in the presence of an acid and a desiccant. DFT studies revealed contrasting mechanisms toward the reactivity of aliphatic amines in protic solvents and aromatic amines in aprotic solvents. While the former proceeds through the formation of an imine, the latter passes through the Michael addition-elimination mechanism.
Collapse
Affiliation(s)
- Reyno R S
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| | - Akash Sugunan
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| | - Ranganayakulu S
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| | - Cherumuttathu H Suresh
- Chemicals Sciences and Technology Division , CSIR-NIIST , Thiruvananthapuram , Kerala 695564 , India
| | - Goreti Rajendar
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| |
Collapse
|
9
|
González‐Soria MJ, Alonso F. Substrate‐Controlled Divergent Synthesis of Enaminones and Pyrroles from Indolizines and Nitroso Compounds. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900837] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- María José González‐Soria
- Instituto de Síntesis Orgánica (ISO) and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Alicante Apdo. 99 03080 Alicante Spain
| | - Francisco Alonso
- Instituto de Síntesis Orgánica (ISO) and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Alicante Apdo. 99 03080 Alicante Spain
| |
Collapse
|
10
|
Sharma P, Singh RR, Giri SS, Chen LY, Cheng MJ, Liu RS. Gold-Catalyzed Oxidation of Thioalkynes To Form Phenylthio Ketene Derivatives via a Noncarbene Route. Org Lett 2019; 21:5475-5479. [PMID: 31274331 DOI: 10.1021/acs.orglett.9b01768] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Gold-catalyzed oxidations of thioalkynes with 8-methylquinoline oxides afford 2-phenylthioketenes that can be trapped efficiently with alcohols. The synthetic utility is manifested by terminal and internal thioalkynes over a wide scope, bearing esters, ketones, alkyl, and oxime substituents. Our density functional theory calculations suggest that gold-catalyzed oxidations of terminal and internal thioalkynes with 8-methylquinoline oxides generate gold-bound ketene intermediates without the intermediacy of α-oxo gold carbene.
Collapse
Affiliation(s)
- Pankaj Sharma
- Frontier Research Center on Fundamental and Applied Sciences of Matters, Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China
| | - Rahulkumar Rajmani Singh
- Frontier Research Center on Fundamental and Applied Sciences of Matters, Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China
| | - Sovan Sundar Giri
- Frontier Research Center on Fundamental and Applied Sciences of Matters, Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China
| | - Liang-Yu Chen
- Department of Chemistry , National Cheng Kung University , Tainan 701 , Taiwan , Republic of China
| | - Mu-Jeng Cheng
- Department of Chemistry , National Cheng Kung University , Tainan 701 , Taiwan , Republic of China
| | - Rai-Shung Liu
- Frontier Research Center on Fundamental and Applied Sciences of Matters, Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China
| |
Collapse
|
11
|
Zarezin DP, Nenajdenko VG. Diazocarbonyl derivatives of amino acids: unique chiral building blocks for the synthesis of biologically active compounds. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4852] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This review deals with applications of chiral α-amino diazoketones, α-amino acid derivatives, in the synthesis of various biologically active compounds. General approaches to the synthesis of chiral α-amino diazoketones, including the Arndt – Eistert reaction, acylation of trimethylsilyldiazomethanes, etc., are discussed. Due to the presence of three functional groups, these building blocks can be used to produce a wide range of organic compounds with potential physiological activity, ranging from various heterocyclic compounds to peptidomimetics. Methods for the synthesis of β-amino acid-containing peptides and depsipeptides, amino acid derivatives and heterocyclic compounds with three- to seven-membered rings are considered.
The bibliography includes 226 references.
Collapse
|
12
|
Liang YX, Meng XH, Yang M, Mehfooz H, Zhao YL. Zn(OAc)2-catalyzed tandem cyclization of isocyanides, α-diazoketones, and anhydrides: a general route to polysubstituted maleimides. Chem Commun (Camb) 2019; 55:12519-12522. [DOI: 10.1039/c9cc05802h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A zinc-catalyzed three-component reaction of isocyanides, α-diazoketones, and anhydrides has been realized as a novel and efficient method for the synthesis of polysubstituted maleimides.
Collapse
Affiliation(s)
- Yong-Xin Liang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University
- Changchun 130024
- China
| | - Xiang-He Meng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University
- Changchun 130024
- China
| | - Ming Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University
- Changchun 130024
- China
| | - Haroon Mehfooz
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University
- Changchun 130024
- China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University
- Changchun 130024
- China
| |
Collapse
|
13
|
Cao J, Yang F, Sun J, Huang Y, Yan CG. Construction of Unique Eight- or Nine-Membered Polyheterocyclic Systems via Multicomponent Reaction of l-Proline, Alkyl Propiolate, and Isatin. J Org Chem 2018; 84:622-635. [DOI: 10.1021/acs.joc.8b02457] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jun Cao
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Fan Yang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Jing Sun
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Ying Huang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Chao-Guo Yan
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| |
Collapse
|
14
|
Thullen SM, Rubush DM, Rovis T. A Photochemical Two-Step Formal [5+2] Cycloaddition: A Condensation/Ring-Expansion Approach to Substituted Azepanes. Synlett 2018; 28:2755-2758. [PMID: 29861552 DOI: 10.1055/s-0036-1589049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Seven-membered nitrogen-containing heterocycles are considerably underrepresented in the literature compared to their five- and six-membered analogues. Herein, we report a relatively understudied photochemical rearrangement of N-vinylpyrrolidinones to azepin-4-ones in good yields. This transformation allows for the conversion of readily available pyrrolidinones and aldehydes to densely functionalized azepane derivatives in a facile two step procedure.
Collapse
Affiliation(s)
- Scott M Thullen
- Department of Chemistry, Columbia University, New York, NY 10027.,Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - David M Rubush
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Tomislav Rovis
- Department of Chemistry, Columbia University, New York, NY 10027.,Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| |
Collapse
|
15
|
He X, Li Y, Wang M, Chen HX, Chen B, Liang H, Zhang Y, Pang J, Qiu L. Highly efficient synthesis of benzodioxins with a 2-site quaternary carbon structure by secondary amine-catalyzed dual Michael cascade reactions. Org Biomol Chem 2018; 16:5533-5538. [DOI: 10.1039/c8ob01029c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Employing salicylic acids and substituted 3-butyn-2-ones as the substrates, a morpholine catalyzed tandem dual Michael addition afforded a benzodioxin skeleton.
Collapse
Affiliation(s)
- Xuefeng He
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Yongsu Li
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Meng Wang
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Hui-Xuan Chen
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Bin Chen
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Hao Liang
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Yaqi Zhang
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Jiyan Pang
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| | - Liqin Qiu
- School of Chemistry
- The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center
- Sun Yat-sen University
- Guangzhou 510275
| |
Collapse
|
16
|
Anusha C, De S, Parameswaran P. Ring contraction of metallabenzooxirene to metal carbonyl complexes - a comparative study with the Wolff rearrangement of oxirene and benzooxirene. Dalton Trans 2017; 46:13974-13982. [PMID: 28975166 DOI: 10.1039/c7dt02911j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed quantum mechanical study on the role of transition metal fragments towards the epoxidation reaction of metallabenzynes (1M, M = Fe, Ru, Os) to give metallabenzyne epoxide or metallabenzooxirene (2M), followed by the Wolff type 1,2-rearrangement to give metal carbonyls (4M), has been carried out at the M06/def2-TZVPP//BP86/def2-SVP level of theory. The epoxide or oxirene product (2A) of linear alkynes like acetylene is unstable and converts to a ketene (4A) by highly exothermic (-78.7 kcal mol-1) Wolff rearrangement via an oxocarbene (3A) intermediate. The epoxide product of cyclic alkynes like benzyne (2C) is comparatively more stable than benzooxocarbene (3C), yet it undergoes rearrangement to cyclopentadienylketene (4C) through Wolff type ring contraction reactions (-65.3 kcal mol-1). The replacement of one of the carbyne carbons in benzyne by 14 VE metal fragment M(PH3)2Cl2, M = Fe, Ru and Os enhances the stability of the 18 VE metallabenzyne epoxide product (2M, -88.1 kcal mol-1 for 2Fe, -87.2 kcal mol-1 for 2Ru and -82.8 kcal mol-1 for 2Os) as compared to the 16 VE metallacyclohexadienone (3M). The ring contracted 18 VE product of 2M is a carbonyl bridged metallacyclopentadienyl complex (4M, M = Fe, Ru and Os). Even though this interconversion is thermodynamically favourable, it involves a high-energy barrier (19.3, 28.1 and 27.9 kcal mol-1 for 2Fe, 2Ru and 2Os, respectively). However, the hepta-coordinated (5M) terminal metallacyclopentadienyl carbonyl analogues of ketene (4A/4C) are not minima on the potential energy surface.
Collapse
Affiliation(s)
- Chakkittakandiyil Anusha
- Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673 601, India.
| | | | | |
Collapse
|
17
|
Kim J, Hong SH. Organocatalytic activation of isocyanides: N-heterocyclic carbene-catalyzed enaminone synthesis from ketones. Chem Sci 2017; 8:2401-2406. [PMID: 28451346 PMCID: PMC5369338 DOI: 10.1039/c6sc05266e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 12/19/2016] [Indexed: 11/21/2022] Open
Abstract
The first example of the use of an N-heterocyclic carbene (NHC) as an organocatalyst for the activation of isocyanides was demonstrated. On the basis of previous reports on the interaction between NHCs and isocyanides, we developed a catalytic cycle involving transient imidoyl intermediate. The reaction of ketones with isocyanides produced the corresponding enaminones with high efficiency. Control experiments suggested a novel role for the carbene in the activation of isocyanides, and a proton transfer process was found to be crucial for the generation of two activated species in the catalytic cycle. Various enaminones, some of which are not easily accessible by other methods, were synthesized in excellent yields. This study clearly demonstrates the potential of the nucleophilic activation of isocyanides in the expansion of their reactivity scope.
Collapse
Affiliation(s)
- Jungwon Kim
- Department of Chemistry , College of Natural Science , Seoul National University , 1 Gwanak-ro , Seoul 08826 , South Korea .
| | - Soon Hyeok Hong
- Department of Chemistry , College of Natural Science , Seoul National University , 1 Gwanak-ro , Seoul 08826 , South Korea .
| |
Collapse
|
18
|
Gao B, Huang H. Copper-Catalyzed Difunctionalization of Terminal Alkynes with Diazo Esters and Amines to Construct β-Enamino Esters. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600883] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Bao Gao
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 People's Republic of China
| | - Hanmin Huang
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 People's Republic of China
| |
Collapse
|
19
|
Park Y, Schindler CS, Jacobsen EN. Enantioselective Aza-Sakurai Cyclizations: Dual Role of Thiourea as H-Bond Donor and Lewis Base. J Am Chem Soc 2016; 138:14848-14851. [PMID: 27787993 PMCID: PMC5148636 DOI: 10.1021/jacs.6b09736] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An enantioselective, catalytic aza-Sakurai cyclization of chlorolactams has been developed as an efficient entry into indolizidine and quinolizidine frameworks. Structure-enantioselectivity relationship studies and mechanistic analysis point to a dual role of the catalyst wherein the thiourea moiety of the catalyst is engaged in both anion binding and Lewis base activation of a substrate.
Collapse
Affiliation(s)
- Yongho Park
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | | | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
20
|
Zhou S, Wang J, Wang L, Song C, Chen K, Zhu J. Enaminones as Synthons for a Directed C−H Functionalization: Rh
III
‐Catalyzed Synthesis of Naphthalenes. Angew Chem Int Ed Engl 2016; 55:9384-8. [DOI: 10.1002/anie.201603943] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 05/14/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Shuguang Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of MicrostructuresNanjing University Nanjing 210093 China
| | - Jinhu Wang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of MicrostructuresNanjing University Nanjing 210093 China
| | - Lili Wang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of MicrostructuresNanjing University Nanjing 210093 China
| | - Chao Song
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of MicrostructuresNanjing University Nanjing 210093 China
| | - Kehao Chen
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of MicrostructuresNanjing University Nanjing 210093 China
| | - Jin Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of MicrostructuresNanjing University Nanjing 210093 China
| |
Collapse
|
21
|
Enaminones as Synthons for a Directed C−H Functionalization: Rh
III
‐Catalyzed Synthesis of Naphthalenes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603943] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
22
|
Chattopadhyay AK, Hanessian S. Cyclic enaminones. Part I: stereocontrolled synthesis using diastereoselective and catalytic asymmetric methods. Chem Commun (Camb) 2016; 51:16437-49. [PMID: 26490402 DOI: 10.1039/c5cc05891k] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic enaminones are versatile intermediates to construct a variety of azacyclic frameworks and have been widely used in alkaloid synthesis. Here, we summarize three approaches for stereoselective syntheses of cyclic enaminones and their functionalized derivatives. These include chiral substrates (chirons) as starting materials, syntheses employing non-catalytic (stoichiometric) reagents, and catalytic asymmetric methods.
Collapse
Affiliation(s)
- Amit Kumar Chattopadhyay
- Department of Chemistry, Université de Montréal, Station Centre Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada.
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal, Station Centre Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada.
| |
Collapse
|
23
|
Selected applications of N-protected (S)-2-(diazoacetyl)pyrrolidines (microreview). Chem Heterocycl Compd (N Y) 2016. [DOI: 10.1007/s10593-016-1848-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
24
|
Kang YW, Cho YJ, Han SJ, Jang HY. Tunable and Diastereoselective Brønsted Acid Catalyzed Synthesis of β-Enaminones. Org Lett 2016; 18:272-5. [DOI: 10.1021/acs.orglett.5b03445] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Ye-Won Kang
- Department
of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - Yu Jin Cho
- Department
of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - Seung Jin Han
- Department
of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - Hye-Young Jang
- Department
of Energy Systems Research, Ajou University, Suwon 443-749, Korea
- Korea Carbon Capture & Sequestration R&D Center, Deajeon 305-343, Korea
| |
Collapse
|
25
|
Braunstein H, Langevin S, Khim M, Adamson J, Hovenkotter K, Kotlarz L, Mansker B, Beng TK. Modular access to vicinally functionalized allylic (thio)morpholinonates and piperidinonates by substrate-controlled annulation of 1,3-azadienes with hexacyclic anhydrides. Org Biomol Chem 2016; 14:8864-8872. [PMID: 27714224 DOI: 10.1039/c6ob01526c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A modular substrate-controlled hexannulation of 1,3-azadienes with hexacyclic anhydrides, which affords versatile vicinally functionalized allylic lactams, in high yields, regio- and stereoselectivities is described.
Collapse
Affiliation(s)
| | - Spencer Langevin
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Monique Khim
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Jonathan Adamson
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | | | - Lindsey Kotlarz
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Brandon Mansker
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Timothy K. Beng
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| |
Collapse
|
26
|
Heravi MM, Talaei B. Ketenes as Privileged Synthons in the Synthesis of Heterocyclic Compounds Part 3. ADVANCES IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/bs.aihch.2015.10.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
27
|
Ford A, Miel H, Ring A, Slattery CN, Maguire AR, McKervey MA. Modern Organic Synthesis with α-Diazocarbonyl Compounds. Chem Rev 2015; 115:9981-10080. [PMID: 26284754 DOI: 10.1021/acs.chemrev.5b00121] [Citation(s) in RCA: 1071] [Impact Index Per Article: 119.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Hugues Miel
- Almac Discovery Ltd. , David Keir Building, Stranmillis Road, Belfast BT9 5AG, United Kingdom
| | | | | | | | - M Anthony McKervey
- Almac Sciences Ltd. , Almac House, 20 Seagoe Industrial Estate, Craigavon BT63 5QD, United Kingdom
| |
Collapse
|
28
|
Kumar A, Rout L, Dhaka RS, Samal SL, Dash P. Design of a graphene oxide-SnO2 nanocomposite with superior catalytic efficiency for the synthesis of β-enaminones and β-enaminoesters. RSC Adv 2015. [DOI: 10.1039/c5ra03363b] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A graphene–SnO2 nanocomposite has been synthesized by a solvothermal method, which is a more effective and less time-consuming catalyst for the synthesis of β-enaminones and β-enaminoesters.
Collapse
Affiliation(s)
- Aniket Kumar
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Lipeeka Rout
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | | | - Saroj L. Samal
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Priyabrat Dash
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| |
Collapse
|
29
|
Xu K, Zhang Z, Qian P, Zha Z, Wang Z. Electrosynthesis of enaminones directly from methyl ketones and amines with nitromethane as a carbon source. Chem Commun (Camb) 2015; 51:11108-11. [DOI: 10.1039/c5cc02730f] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient and mechanistically different method for the electrosynthesis of enaminone directly from methyl ketones, amines and nitromethane was developed.
Collapse
Affiliation(s)
- Kun Xu
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Zhenlei Zhang
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Peng Qian
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| |
Collapse
|
30
|
|
31
|
Zhao L, Wang J, Zheng H, Li Y, Yang K, Cheng B, Jin X, Yao X, Zhai H. Silver(I)-Catalyzed Ring-Contractive Rearrangement: A New Entry to 5-Alkylidene-2-cyclopentenones. Org Lett 2014; 16:6378-81. [DOI: 10.1021/ol503176y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Liang Zhao
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Jinlian Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Hongyan Zheng
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yun Li
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Ke Yang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Bin Cheng
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiaojie Jin
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiaojun Yao
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Hongbin Zhai
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| |
Collapse
|
32
|
Xie YY, Wang YC, Qu HE, Tan XC, Wang HS, Pan YM. Regioselective Synthesis of β-Aryl Enaminones and 1,4,5- Trisubstituted 1,2,3-Triazoles from Chalcones and Benzyl Azides. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400315] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
33
|
Miura T, Funakoshi Y, Tanaka T, Murakami M. Direct Production of Enaminones from Terminal Alkynes via Rhodium-Catalyzed Reaction of Formamides with N-Sulfonyl-1,2,3-triazoles. Org Lett 2014; 16:2760-3. [DOI: 10.1021/ol5010774] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Yuuta Funakoshi
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Takamasa Tanaka
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| |
Collapse
|
34
|
Seki H, Georg GI. Enantiospecific Synthesis and Biological Investigations of a Nuphar Alkaloid: Proposed Structure of a Castoreum Component. European J Org Chem 2014; 2014:3777-3783. [PMID: 25395879 DOI: 10.1002/ejoc.201402232] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An enantiospecific synthesis of a Nuphar alkaloid was achieved in 9 steps from N-Boc-(L)-proline. The alkaloid is a minor component of castoreum, the dried scent glands of the beaver. During the course of our study, the stereochemistry of three synthetic intermediates was verified by X-ray analysis, which contributes to resolving existing discrepancies among the literature reports regarding the synthesis of this particular compound. Based on our synthesis, we propose the structure of the natural product. Also, intrigued by castoreum's therapeutic effect, which was used in ancient Greece and Rome for gynecological and other purposes, biological screening was conducted. We found that the alkaloid has affinity for the oxytocin receptor.
Collapse
Affiliation(s)
- Hajime Seki
- Departments of Chemistry and Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware St. SE, Minneapolis MN 55414 U.S.A
| | - Gunda I Georg
- Departments of Chemistry and Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware St. SE, Minneapolis MN 55414 U.S.A
| |
Collapse
|
35
|
Ma B, Chen FL, Xu XY, Zhang YN, Hu LH. α-Diazo β-Keto Ester as Precursor to Aromatic CH Insertion and Wolff Rearrangement with Different Directing Groups. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300763] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
36
|
Efficient PPA-SiO2-catalyzed synthesis of β-enaminones under solvent-free conditions. Molecules 2013; 18:15182-92. [PMID: 24335572 PMCID: PMC6270262 DOI: 10.3390/molecules181215182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 11/14/2013] [Accepted: 11/14/2013] [Indexed: 12/03/2022] Open
Abstract
An efficient method has been developed for the synthesis of β-enaminones under solvent-free reaction conditions using PPA-SiO2 as catalyst. The reaction yields were good to excellent (up to 90%). This methodology affords high selectivity and good tolerance of a variety of different functional groups present on both aromatic and aliphatic amines. In addition, the methodology is environmentally benign and cost-effective due to absence of solvent and easy work-up.
Collapse
|
37
|
Trinh TTH, Nguyen KH, de Aguiar Amaral P, Gouault N. Total synthesis of (-)-epimyrtine by a gold-catalyzed hydroamination approach. Beilstein J Org Chem 2013; 9:2042-7. [PMID: 24204417 PMCID: PMC3817515 DOI: 10.3762/bjoc.9.242] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 09/24/2013] [Indexed: 12/02/2022] Open
Abstract
A new approach to the total synthesis of (−)-epimyrtine has been developed from D-alanine. The key step to access the enantiopure pyridone intermediate was achieved by a gold-mediated cyclization. Finally, various transformations afforded the natural product in a few steps and good overall yield.
Collapse
Affiliation(s)
- Thi Thanh Huyen Trinh
- Equipe PNSCM, UMR6226, Université de Rennes 1, 2 avenue du Pr Léon Bernard, 35043 Rennes Cedex, France
| | | | | | | |
Collapse
|
38
|
Yu D, Sum YN, Ean ACC, Chin MP, Zhang Y. Acetylide Ion (C
2
2−
) as a Synthon To Link Electrophiles and Nucleophiles: A Simple Method for Enaminone Synthesis. Angew Chem Int Ed Engl 2013; 52:5125-8. [DOI: 10.1002/anie.201301019] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 03/08/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Dingyi Yu
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Yin Ngai Sum
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Amanda Chng Cheng Ean
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Mei Ping Chin
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Yugen Zhang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| |
Collapse
|
39
|
Acetylide Ion (C22−) as a Synthon To Link Electrophiles and Nucleophiles: A Simple Method for Enaminone Synthesis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
40
|
Xu X, Zavalij PY, Hu W, Doyle MP. Vinylogous reactivity of enol diazoacetates with donor-acceptor substituted hydrazones. Synthesis of substituted pyrazole derivatives. J Org Chem 2013; 78:1583-8. [PMID: 23301562 DOI: 10.1021/jo302696y] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A regiospecific synthesis of multifunctional pyrazoleshas been developed from a cascade process triggered by Rh(II)-catalyzed dinitrogen extrusion from enol diazoacetates with vinylogous nucleophilic addition followed by Lewis acid catalyzed cyclization and aromatization.
Collapse
Affiliation(s)
- Xinfang Xu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | | | | | | |
Collapse
|
41
|
Glotova TE, Dvorko MY, Ushakov IA, Shabalin DA, Schmidt EY, Trofimov BA. Modification of g-Aminobutyric Acid with Acylacetylenes: Stereoselective C-Vinylation of the Primary Adducts and Transformation to Acylpyridines. MENDELEEV COMMUNICATIONS 2012. [DOI: 10.1016/j.mencom.2012.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
42
|
Kim YW, Niphakis MJ, Georg GI. Copper-assisted palladium(II)-catalyzed direct arylation of cyclic enaminones with arylboronic acids. J Org Chem 2012; 77:9496-503. [PMID: 23088256 DOI: 10.1021/jo301531k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Described herein is a palladium(II)-catalyzed direct arylation of cyclic enaminones with arylboronic acids. The versatility of this method is that both electron-rich and electron-poor boronic acids can be coupled in high yields. A mixture of two Cu(II) additives was crucial for efficient cross-coupling. The role of each Cu(II) reagent appears to be distinct and complementary serving to assist catalyst reoxidation and transmetalation through a putative arylcopper intermediate.
Collapse
Affiliation(s)
- Yong Wook Kim
- Department of Chemistry, and the Institute for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55414, United States
| | | | | |
Collapse
|
43
|
Miura T, Funakoshi Y, Morimoto M, Biyajima T, Murakami M. Synthesis of Enaminones by Rhodium-Catalyzed Denitrogenative Rearrangement of 1-(N-Sulfonyl-1,2,3-triazol-4-yl)alkanols. J Am Chem Soc 2012; 134:17440-3. [DOI: 10.1021/ja308285r] [Citation(s) in RCA: 173] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Yuuta Funakoshi
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masao Morimoto
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Tsuneaki Biyajima
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry
and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| |
Collapse
|
44
|
Shen H, Lu X, Jiang KZ, Yang KF, Lu Y, Zheng ZJ, Lai GQ, Xu LW. Dimethylbut-2-ynedioate mediated esterification of acids via sp3 C–N bond cleavage of benzylic tertiary amines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
45
|
Mac DH, Sattar A, Chandrasekhar S, Yadav JS, Grée R. Synthesis of new 4-methyl-3-piperidones via an iron-catalyzed intramolecular tandem isomerization–aldolisation process. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
46
|
Ishida N, Yuhki T, Murakami M. Synthesis of Enantiopure Dehydropiperidinones from α-Amino Acids and Alkynes via Azetidin-3-ones. Org Lett 2012; 14:3898-901. [DOI: 10.1021/ol3016447] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoki Ishida
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Tatsuya Yuhki
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| |
Collapse
|
47
|
Xie P, Qian B, Huang H, Xia C. Stereoselective synthesis of trans β-lactams via palladium/N-heterocyclic carbene-catalyzed carbonylative [2+2] cycloaddition. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.01.073] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
48
|
Jiang Y, Chan WC, Park CM. Expedient synthesis of highly substituted pyrroles via tandem rearrangement of α-diazo oxime ethers. J Am Chem Soc 2012; 134:4104-7. [PMID: 22332783 DOI: 10.1021/ja300552c] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient rhodium-catalyzed synthesis of 2H-azirines and pyrroles has been developed. Novel rearrangement of α-oximino ketenes derived from α-diazo oxime ethers provides 2H-azirines bearing quaternary centers and allows for subsequent rearrangement to highly substituted pyrroles in excellent yields.
Collapse
Affiliation(s)
- Yaojia Jiang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | | | | |
Collapse
|
49
|
Gharpure SJ, Vijayasree U, Reddy SRB. Stereoselective synthesis and applications of nitrogen substituted donor–acceptor cyclopropanes (N-DACs) in the divergent synthesis of azacycles. Org Biomol Chem 2012; 10:1735-8. [DOI: 10.1039/c2ob06591f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
50
|
Allen AD, Tidwell TT. New Directions in Ketene Chemistry: The Land of Opportunity. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101230] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Annette D. Allen
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada, M5S 3H6, Fax: +1‐416978‐5325
| | - Thomas T. Tidwell
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada, M5S 3H6, Fax: +1‐416978‐5325
| |
Collapse
|