1
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Stockhammer L, Craik R, Monkowius U, Cordes DB, Smith AD, Waser M. Isothiourea-Catalyzed Enantioselective Functionalisation of Glycine Schiff Base Aryl Esters via 1,6- and 1,4-Additions. CHEMISTRYEUROPE 2023; 1:e202300015. [PMID: 38882579 PMCID: PMC7616101 DOI: 10.1002/ceur.202300015] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Indexed: 06/18/2024]
Abstract
The enantioselective α-functionalisation of glycine Schiff base aryl esters through isothiourea catalysis is successfully demonstrated for 1,6-additions to para-quinone methides (21 examples, up to 95:5 dr and 96:4 er) and 1,4-additions to methylene substituted dicarbonyl or disulfonyl Michael acceptors (17 examples, up to 98:2 er). This nucleophilic organocatalysis approach gives access to a range of α-functionalised α-amino acid derivatives and further transformations of the activated aryl ester group provide a straightforward entry to advanced amino acid-based esters, amides or thioesters.
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Affiliation(s)
- Lotte Stockhammer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
| | - Rebecca Craik
- EaStCHEM, School of Chemistry, University of St Andrews, KY16 9ST St Andrews, Fife, (UK)
| | - Uwe Monkowius
- School of Education, Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, KY16 9ST St Andrews, Fife, (UK)
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, KY16 9ST St Andrews, Fife, (UK)
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
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2
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Wang Y, Young CM, Liu H, Hartley WC, Wienhold M, Cordes DB, Slawin AMZ, Smith AD. A Desilylative Approach to Alkyl Substituted C(1)‐Ammonium Enolates: Application in Enantioselective [2+2] Cycloadditions. Angew Chem Int Ed Engl 2022; 61:e202208800. [PMID: 35833471 PMCID: PMC9543305 DOI: 10.1002/anie.202208800] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Indexed: 11/22/2022]
Abstract
The catalytic generation of C(1)‐ammonium enolates from the corresponding α‐silyl‐α‐alkyl substituted carboxylic acids using the isothiourea HyperBTM is reported. This desilylative approach grants access to α‐unsubstituted and α‐alkyl substituted C(1)‐ammonium enolates, which are typically difficult to access through traditional methods reliant upon deprotonation. The scope and limitations of this process is established in enantioselective [2+2]‐cycloaddition processes with perfluoroalkylketones (31 examples, up to 96 % yield and >99 : 1 er), as well as selective [2+2]‐cycloaddition with trifluoromethyl enones (4 examples, up to 75 % yield and >99 : 1 er). Preliminary mechanistic studies indicate this process proceeds through an initial kinetic resolution of an in situ prepared (±)‐α‐silyl‐α‐alkyl substituted anhydride, while the reaction process exhibits overall pseudo zero‐order kinetics.
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Affiliation(s)
- Yihong Wang
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Claire M. Young
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Honglei Liu
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Will C. Hartley
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Max Wienhold
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - David. B. Cordes
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | | | - Andrew D. Smith
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
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3
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Smith AD, Wang Y, Young CM, Liu H, Hartley WC, Wienhold M, Cordes DB, Slawin AMZ. A Desilylative Approach to Alkyl Substituted C(1)‐Ammonium Enolates: Application in Enantioselective [2+2] Cycloadditions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew David Smith
- University of St Andrews School of Chemistry North Haugh FIFE, KY10 3TH St. Andrews UNITED KINGDOM
| | - Yihong Wang
- University of St Andrews School of Chemistry UNITED KINGDOM
| | | | - Honglei Liu
- University of St Andrews School of Chemistry UNITED KINGDOM
| | | | - Max Wienhold
- University of St Andrews School of Chemistry UNITED KINGDOM
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4
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McLaughlin C, Smith AD. Generation and Reactivity of C(1)-Ammonium Enolates by Using Isothiourea Catalysis. Chemistry 2021; 27:1533-1555. [PMID: 32557875 PMCID: PMC7894297 DOI: 10.1002/chem.202002059] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Indexed: 12/17/2022]
Abstract
C(1)-Ammonium enolates are powerful, catalytically generated synthetic intermediates applied in the enantioselective α-functionalisation of carboxylic acid derivatives. This minireview describes the recent developments in the generation and application of C(1)-ammonium enolates from various precursors (carboxylic acids, anhydrides, acyl imidazoles, aryl esters, α-diazoketones, alkyl halides) using isothiourea Lewis base organocatalysts. Their synthetic utility in intra- and intermolecular enantioselective C-C and C-X bond forming processes on reaction with various electrophiles will be showcased utilising two distinct catalyst turnover approaches.
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Affiliation(s)
- Calum McLaughlin
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughFifeKY16 9STScotland
| | - Andrew D. Smith
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughFifeKY16 9STScotland
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5
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Du F, Li S, Jiang K, Zeng R, Pan X, Lan Y, Chen Y, Wei Y. Iron‐Catalyzed Radical Relay Enabling the Modular Synthesis of Fused Pyridines from Alkyne‐Tethered Oximes and Alkenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010752] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fei Du
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Shi‐Jun Li
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
| | - Kun Jiang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Rong Zeng
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Xi‐Chun Pan
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Yu Lan
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
- School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
| | - Ying‐Chun Chen
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ye Wei
- College of Pharmacy Army Medical University Chongqing 400038 China
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6
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Du F, Li S, Jiang K, Zeng R, Pan X, Lan Y, Chen Y, Wei Y. Iron‐Catalyzed Radical Relay Enabling the Modular Synthesis of Fused Pyridines from Alkyne‐Tethered Oximes and Alkenes. Angew Chem Int Ed Engl 2020; 59:23755-23762. [DOI: 10.1002/anie.202010752] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Indexed: 12/26/2022]
Affiliation(s)
- Fei Du
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Shi‐Jun Li
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
| | - Kun Jiang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Rong Zeng
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Xi‐Chun Pan
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Yu Lan
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
- School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
| | - Ying‐Chun Chen
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ye Wei
- College of Pharmacy Army Medical University Chongqing 400038 China
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7
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Zhang S, Bacheley L, Young CM, Stark DG, O'Riordan T, Slawin AMZ, Smith AD. Isothiourea‐Catalyzed Functionalization of Pyrrolyl‐ and Indolylacetic Acid: Enantioselective Synthesis of Dihydropyridinones and One‐pot Synthesis of Pyridinones. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shuyue Zhang
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Lucas Bacheley
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Claire M. Young
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Daniel G. Stark
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Timothy O'Riordan
- Syngenta Jealott's Hill International Research Centre Bracknell Berkshire RG42 6EY UK
| | - Alexandra M. Z. Slawin
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Andrew D. Smith
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
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8
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Zhang S, Hartley WC, Greenhalgh MD, Ng S, Slawin AMZ, Smith AD. Isothiourea‐Catalyzed Synthesis of Pyrrole‐ and Indole‐Functionalized Tetrasubstituted Pyridines. ChemCatChem 2020. [DOI: 10.1002/cctc.202000882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Will C. Hartley
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Mark D. Greenhalgh
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Sean Ng
- Syngenta Jealott's Hill International Research Centre Bracknell Berkshire, RG42 6EY UK
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
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9
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Vodnala N, Gujjarappa R, Satheesh V, Gupta R, Kaldhi D, Kabi AK, Malakar CC. Copper‐Catalyzed [2+2+1+1] Annulation for the Regioselective Synthesis of 2,6‐Diarylpyridines
via
C1‐Insertion and Subsequent Cyclization. ChemistrySelect 2020. [DOI: 10.1002/slct.202002968] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nagaraju Vodnala
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Raghuram Gujjarappa
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Vanaparthi Satheesh
- Schulich Faculty of Chemistry Technion-Israel Institute of Technology Haifa 3200003 Israel
| | - Richa Gupta
- Department of Chemistry National University of Singapore Singapore 117543 Singapore
| | - Dhananjaya Kaldhi
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Arup K. Kabi
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
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10
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Affiliation(s)
- Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - Jonas J. Koenig
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
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11
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Li L, Ding D, Song J, Han Z, Gong L. Catalytic Generation of C1 Ammonium Enolates from Halides and CO for Asymmetric Cascade Reactions. Angew Chem Int Ed Engl 2019; 58:7647-7651. [DOI: 10.1002/anie.201901501] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/10/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Lu‐Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Du Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Zhi‐Yong Han
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
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12
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Li L, Ding D, Song J, Han Z, Gong L. Catalytic Generation of C1 Ammonium Enolates from Halides and CO for Asymmetric Cascade Reactions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901501] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lu‐Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Du Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Zhi‐Yong Han
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
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13
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Liu J, Zhao S, Yan X, Wang Z, Zhang Y, Zhao P, Fang W, Zhuo K, Yue Y. Dual Roles of α,β-Unsaturated Oximes in Copper Catalyzed [3+3] Cyclization: Construction of 2,4,6-Trisubstituted Pyridines. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jianming Liu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Shufang Zhao
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Xuyang Yan
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Zhixian Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Yanyan Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Peizheng Zhao
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Wenhan Fang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Kelei Zhuo
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
| | - Yuanyuan Yue
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Henan Normal University; Xinxiang, Henan 453007 China
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14
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Liu J, Yan X, Yue Y, Zhao S, Zhang J, Sun Y, Zhuo K. CO
2
‐Promoted C=N Bond Cleavage of Amidines Leading to Multi‐Substituted Pyridines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
| | - Xuyang Yan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
| | - Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
| | - Shufang Zhao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
| | - Jia Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
| | - Yangyang Sun
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of Education, School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 People's Republic of China
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15
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Tan WW, Ong YJ, Yoshikai N. Synthesis of Highly Substituted Pyridines through Copper-Catalyzed Condensation of Oximes and α,β-Unsaturated Imines. Angew Chem Int Ed Engl 2017; 56:8240-8244. [DOI: 10.1002/anie.201704378] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Wei Wen Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Yew Jin Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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16
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Tan WW, Ong YJ, Yoshikai N. Synthesis of Highly Substituted Pyridines through Copper-Catalyzed Condensation of Oximes and α,β-Unsaturated Imines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704378] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Wei Wen Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Yew Jin Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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17
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Sheng J, Wang Y, Su X, He R, Chen C. Copper-Catalyzed [2+2+2] Modular Synthesis of Multisubstituted Pyridines: Alkenylation of Nitriles with Vinyliodonium Salts. Angew Chem Int Ed Engl 2017; 56:4824-4828. [PMID: 28371269 DOI: 10.1002/anie.201700696] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/28/2017] [Indexed: 01/25/2023]
Abstract
A [2+2+2] modular synthesis of multisubstituted pyridines, with excellent regioselectivity, has been realized by copper catalysisand involves three distinct components: vinyliodonium salts, nitriles, and alkynes. The reactions proceeded with the facile formation of an aza-butadienylium intermediate by alkenylation of the nitrile with a vinyliodonium salt. Moreover, the alkynes in the reaction were extended to alkenes, which are an advantage of expense and relative scarceness of alkynes.
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Affiliation(s)
- Jinyu Sheng
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yong Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Xiang Su
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Ru He
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Chao Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China
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18
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Sheng J, Wang Y, Su X, He R, Chen C. Copper-Catalyzed [2+2+2] Modular Synthesis of Multisubstituted Pyridines: Alkenylation of Nitriles with Vinyliodonium Salts. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700696] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jinyu Sheng
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Yong Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Xiang Su
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Ru He
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Chao Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
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19
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Park CH, Kwon YJ, Oh IY, Kim WS. Synthesis of Trisubstituted PyridinesviaChemoselective Suzuki-Miyaura Coupling of 3,5- and 4,6-Dibromo-2-tosyloxypyridines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201600950] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Cho-Hee Park
- Department of Chemistry and Nano Science; Ewha Womans University; Seoul 120-750 South Korea
| | - Yong-Ju Kwon
- Department of Chemistry and Nano Science; Ewha Womans University; Seoul 120-750 South Korea
| | - In-Young Oh
- Department of Chemistry and Nano Science; Ewha Womans University; Seoul 120-750 South Korea
| | - Won-Suk Kim
- Department of Chemistry and Nano Science; Ewha Womans University; Seoul 120-750 South Korea
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20
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Xie LG, Shaaban S, Chen X, Maulide N. Metal-Free Synthesis of Highly Substituted Pyridines by Formal [2+2+2] Cycloaddition under Mild Conditions. Angew Chem Int Ed Engl 2016; 55:12864-7. [DOI: 10.1002/anie.201606604] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 07/22/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Lan-Gui Xie
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
| | - Saad Shaaban
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
| | - Xiangyu Chen
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
| | - Nuno Maulide
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
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21
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Xie LG, Shaaban S, Chen X, Maulide N. Metal-Free Synthesis of Highly Substituted Pyridines by Formal [2+2+2] Cycloaddition under Mild Conditions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606604] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Lan-Gui Xie
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
| | - Saad Shaaban
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
| | - Xiangyu Chen
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
| | - Nuno Maulide
- University of Vienna, Institute of Organic Chemistry; Währinger Strasse 38 1090 Vienna Austria
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22
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Kasten K, Cordes DB, Slawin AMZ, Smith AD. Quinidine-Catalysed Enantioselective Synthesis of 6- and 4-Trifluoromethyl-Substituted Dihydropyrans. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600583] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Kevin Kasten
- EaStCHEM; School of Chemistry; University of St Andrews; North Haugh KY16 9ST St Andrews, Fife United Kingdom
| | - David B. Cordes
- EaStCHEM; School of Chemistry; University of St Andrews; North Haugh KY16 9ST St Andrews, Fife United Kingdom
| | - Alexandra M. Z. Slawin
- EaStCHEM; School of Chemistry; University of St Andrews; North Haugh KY16 9ST St Andrews, Fife United Kingdom
| | - Andrew D. Smith
- EaStCHEM; School of Chemistry; University of St Andrews; North Haugh KY16 9ST St Andrews, Fife United Kingdom
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23
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Wang S, Dong C, Yu L, Guo C, Jiang K. Dissociation of protonated N-(3-phenyl-2H-chromen-2-ylidene)-benzenesulfonamide in the gas phase: cyclization via sulfonyl cation transfer. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:95-100. [PMID: 26661975 DOI: 10.1002/rcm.7420] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/23/2015] [Accepted: 10/05/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE In the tandem mass spectrometry of protonated N-(3-phenyl-2H-chromen-2-ylidene)benzenesulfonamides, the precursor ions have been observed to undergo gas-phase dissociation via two competing channels: (a) the predominant channel involves migration of the sulfonyl cation to the phenyl C atom and the subsequent loss of benzenesulfinic acid along with cyclization reaction, and (b) the minor one involves dissociation of the precursor ion to give an ion/neutral complex of [sulfonyl cation/imine], followed by decomposition to afford sulfonyl cation or the INC-mediated electron transfer to give an imine radical cation. METHODS The proposed reaction channels have been supported by theoretical calculations and D-labeling experiments. RESULTS The gas-phase cyclization reaction originating from the N- to C-sulfonyl cation transfer has been first reported to the best of our knowledge. CONCLUSIONS For the substituted sulfonamides, the presence of electron-donating groups (R(2) -) at the C-ring effectively facilitates the reaction channel of cyclization reaction, whereas that of electron-withdrawing groups inhibits this pathway.
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Affiliation(s)
- Shanshan Wang
- Key Laboratory of Organosilicon Chemistry and Material Technology, Hangzhou Normal University, Hangzhou, 311121, China
| | - Cheng Dong
- Key Laboratory of Organosilicon Chemistry and Material Technology, Hangzhou Normal University, Hangzhou, 311121, China
| | - Lian Yu
- Key Laboratory of Organosilicon Chemistry and Material Technology, Hangzhou Normal University, Hangzhou, 311121, China
| | - Cheng Guo
- Cancer Institute, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Kezhi Jiang
- Key Laboratory of Organosilicon Chemistry and Material Technology, Hangzhou Normal University, Hangzhou, 311121, China
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24
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Stark DG, Morrill LC, Cordes DB, Slawin AMZ, O'Riordan TJC, Smith AD. Enantioselective Synthesis of 3,5,6-Substituted Dihydropyranones and Dihydropyridinones using Isothiourea-Mediated Catalysis. Chem Asian J 2015; 11:395-400. [PMID: 26471245 PMCID: PMC4755233 DOI: 10.1002/asia.201500907] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Indexed: 02/02/2023]
Abstract
The scope of dihydropyranone and dihydropyridinone products accessible by isothiourea-catalyzed processes has been expanded and explored through the use of 2-N-tosyliminoacrylates and 2-aroylacrylates in a Michael addition-lactonization/lactamization cascade reaction. Notably, to ensure reproducibility it is essential to use homoanhydrides as ammonium enolate precursors with 2-aroyl acrylates, while carboxylic acids can be used with 2-N-tosyliminoacrylates, delivering a range of 3,5,6-substituted dihydropyranones and dihydropyridinones with high enantioselectivity (typically >90 % ee). The derivatization of the heterocyclic core of a 3,5,6-substituted dihydropyranone through hydrogenation is also reported.
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Affiliation(s)
- Daniel G Stark
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - Louis C Morrill
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - David B Cordes
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - Alexandra M Z Slawin
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - Timothy J C O'Riordan
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Andrew D Smith
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK.
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25
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Smith SR, Fallan C, Taylor JE, McLennan R, Daniels DSB, Morrill LC, Slawin AMZ, Smith AD. Asymmetric Isothiourea-Catalysed Formal [3+2] Cycloadditions of Ammonium Enolates with Oxaziridines. Chemistry 2015; 21:10530-6. [PMID: 26073559 PMCID: PMC4531819 DOI: 10.1002/chem.201501271] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/07/2022]
Abstract
A highly enantioselective Lewis base-catalysed formal [3+2] cycloaddition of ammonium enolates and oxaziridines to give stereodefined oxazolidin-4-ones in high yield is described. Employing an enantioenriched oxaziridine in this process leads to a matched/mis-matched effect with the isothiourea catalyst and allowed the synthesis of either syn- or anti-stereodefined oxazolidin-4-ones in high d.r., yield and ee. Additionally, the oxazolidin-4-one products have been derivatised to afford functionalised enantioenriched building blocks.
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Affiliation(s)
- Siobhan R Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Charlene Fallan
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Ross McLennan
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - David S B Daniels
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Louis C Morrill
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK).
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26
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Transition metal-free one-pot synthesis of nitrogen-containing heterocycles. Mol Divers 2015; 20:185-232. [DOI: 10.1007/s11030-015-9596-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 04/02/2015] [Indexed: 01/22/2023]
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27
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Jin Z, Jiang K, Fu Z, Torres J, Zheng P, Yang S, Song BA, Chi YR. Nucleophilic β-Carbon Activation of Propionic Acid as a 3-Carbon Synthon by Carbene Organocatalysis. Chemistry 2015; 21:9360-3. [PMID: 26013883 DOI: 10.1002/chem.201501481] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 12/17/2022]
Abstract
Direct β-carbon activation of propionic acid (C2H5CO2H) by carbene organocatalysis has been developed. This activation affords the smallest azolium homoenolate intermediate (without any substituent) as a 3-carbon nucleophile for enantioselective reactions. Propionic acid is an excellent raw material because it is cheap, stable, and safe. This approach provides a much better solution to azolium homoenolate synthesis than the previously established use of acrolein (enal without any substituent), which is expensive, unstable, and toxic.
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Affiliation(s)
- Zhichao Jin
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Ke Jiang
- School of Biological Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Zhenqian Fu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Jaume Torres
- School of Biological Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Pengcheng Zheng
- Laboratory Breeding Base of Green Pesticide and Agricultural, Bioengineering, Key Laboratory of Green Pesticide and Agricultural, Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025 (P. R. China)
| | - Song Yang
- Laboratory Breeding Base of Green Pesticide and Agricultural, Bioengineering, Key Laboratory of Green Pesticide and Agricultural, Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025 (P. R. China)
| | - Bao-An Song
- Laboratory Breeding Base of Green Pesticide and Agricultural, Bioengineering, Key Laboratory of Green Pesticide and Agricultural, Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025 (P. R. China).
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural, Bioengineering, Key Laboratory of Green Pesticide and Agricultural, Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025 (P. R. China).
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28
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Xie Y, Yu C, Li T, Tu S, Yao C. An NHC-catalyzed in situ activation strategy to β-functionalize saturated carboxylic acid: an enantioselective formal [3+2] annulation for spirocyclic oxindolo-γ-butyrolactones. Chemistry 2015; 21:5355-9. [PMID: 25689040 DOI: 10.1002/chem.201500345] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Indexed: 01/07/2023]
Abstract
An in situ NHC-catalyzed activation strategy to β-functionalize saturated carboxylic acid was developed. This asymmetric formal [3+2] annulation could deliver spirocyclic oxindolo-γ-butyrolactones from saturated carboxylic acid and isatin in good yields with high to excellent enantioselectivities. The easy availability of the starting materials, direct installation of functional units at unreactive carbon atom and the convergent assembly make this protocol attractive in the field of organic synthesis.
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Affiliation(s)
- Yuanwei Xie
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116 (P.R. China)
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29
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Preise 2014 der Royal Society of Chemistry. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Royal Society of Chemistry Awards 2014. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/anie.201407224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Chen XY, Gao ZH, Song CY, Zhang CL, Wang ZX, Ye S. N-Heterocyclic Carbene Catalyzed Cyclocondensation of α,β-Unsaturated Carboxylic Acids: Enantioselective Synthesis of Pyrrolidinone and Dihydropyridinone Derivatives. Angew Chem Int Ed Engl 2014; 53:11611-5. [DOI: 10.1002/anie.201407469] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Indexed: 12/14/2022]
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32
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Chen XY, Gao ZH, Song CY, Zhang CL, Wang ZX, Ye S. N-Heterocyclic Carbene Catalyzed Cyclocondensation of α,β-Unsaturated Carboxylic Acids: Enantioselective Synthesis of Pyrrolidinone and Dihydropyridinone Derivatives. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407469] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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33
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Belmessieri D, de la Houpliere A, Calder EDD, Taylor JE, Smith AD. Stereodivergent organocatalytic intramolecular Michael addition/lactonization for the asymmetric synthesis of substituted dihydrobenzofurans and tetrahydrofurans. Chemistry 2014; 20:9762-9. [PMID: 24989672 PMCID: PMC4517160 DOI: 10.1002/chem.201402684] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/19/2022]
Abstract
A stereodivergent asymmetric Lewis base catalyzed Michael addition/lactonization of enone acids into substituted dihydrobenzofuran and tetrahydrofuran derivatives is reported. Commercially available (S)-(-)-tetramisole hydrochloride gives products with high syn diastereoselectivity in excellent enantioselectivity (up to 99:1 d.r.syn/anti , 99 % eesyn ), whereas using a cinchona alkaloid derived catalyst gives the corresponding anti-diastereoisomers as the major product (up to 10:90 d.r.syn/anti , 99 % eeanti ).
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Affiliation(s)
- Dorine Belmessieri
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Alix de la Houpliere
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Ewen D D Calder
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
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34
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Fu Z, Jiang K, Zhu T, Torres J, Chi YR. Access to oxoquinoline heterocycles by N-heterocyclic carbene catalyzed ester activation for selective reaction with an enone. Angew Chem Int Ed Engl 2014; 53:6506-10. [PMID: 24839111 DOI: 10.1002/anie.201402620] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 03/20/2014] [Indexed: 12/20/2022]
Abstract
Organocatalytic ester activation is developed for a highly selective cascade reaction between saturated esters and amino enones. The reaction involves activation of the β-carbon atom of the ester as a key step. This method allows a single-step access to multicyclic oxoquinoline-type heterocycles with high enantiomeric ratios.
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Affiliation(s)
- Zhenqian Fu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
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35
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Fu Z, Jiang K, Zhu T, Torres J, Chi YR. Access to Oxoquinoline Heterocycles by N‐Heterocyclic Carbene Catalyzed Ester Activation for Selective Reaction with an Enone. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402620] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhenqian Fu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Ke Jiang
- School of Biological Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Tingshun Zhu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Jaume Torres
- School of Biological Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
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36
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Zhang HM, Jia WQ, Liang ZQ, Ye S. N-Heterocyclic Carbene-Catalyzed [3+3] Cyclocondensation of Bromoenals and Ketimines: Highly Enantioselective Synthesis of Dihydropyridinones. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201400010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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