1
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Wang JM, Zhao Y, Yao CS, Zhang K. Stereoselective synthesis of C3-tetrasubstituted oxindoles via copper catalyzed asymmetric propargylation. RSC Adv 2022; 12:26727-26732. [PMID: 36320842 PMCID: PMC9490778 DOI: 10.1039/d2ra04603b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 09/10/2022] [Indexed: 11/21/2022] Open
Abstract
Herein, a copper catalyzed asymmetric propargylation of 2-oxindole-3-carboxylate esters with terminal propargylic esters is described. This strategy successfully provides a direct approach to constructing a broad range of chiral C3-tetrasubstituted oxindoles with contiguous tertiary and quaternary carbon stereocenters in high yields and excellent enantioselectivities (16 examples, up to 99% yield and 98% ee). Moreover, the diastereoisomers of the two newly formed stereocenters can be separated by silica gel chromatography, thereby providing a valuable stereoselective access to all four possible stereoisomers of C3-tetrasubstituted oxindoles. Herein, a copper catalyzed asymmetric propargylation of 2-oxindole-3-carboxylate esters with terminal propargylic esters is described.![]()
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Affiliation(s)
- Jiao-Mei Wang
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou 221018, P. R. China
| | - Yu Zhao
- College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, P. R. China
| | - Chang-Sheng Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China
| | - Kai Zhang
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China
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2
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Okuno K, Nakamura T, Shirakawa S. Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ken Okuno
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Takumi Nakamura
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Seiji Shirakawa
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
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3
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Zhou J, Bai LJ, Liang GJ, Xu QG, Zhou LP, Zhou H. Organocatalytic asymmetric cascade 1,6-addition/hemiketalization/retro-Henry reaction of ortho-hydroxyphenyl-substituted p-QMs with α-nitroketones. Org Biomol Chem 2020; 18:2641-2645. [DOI: 10.1039/d0ob00397b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel organocatalytic asymmetric cascade 1,6-addition/hemiketalization/retro-Henry reaction is developed to give new chiral 2-(1-(4-hydroxyphenyl)ethyl)phenols with good yields and excellent enantioselectivities under mild reaction conditions.
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Affiliation(s)
- Jing Zhou
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- School of Pharmacy
- Chongqing Medical University
- Chongqing 400016
| | - Li-Juan Bai
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- School of Pharmacy
- Chongqing Medical University
- Chongqing 400016
| | - Guo-Juan Liang
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- School of Pharmacy
- Chongqing Medical University
- Chongqing 400016
| | - Qi-Gui Xu
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- School of Pharmacy
- Chongqing Medical University
- Chongqing 400016
| | - Li-Ping Zhou
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- School of Pharmacy
- Chongqing Medical University
- Chongqing 400016
| | - Hui Zhou
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- School of Pharmacy
- Chongqing Medical University
- Chongqing 400016
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4
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Huo M, Zhou J, Bai L, Xu Q, Zhou Z, Zhou H, Liang G. High diastereoselective synthesis of spiro-barbituratechromans via domino oxa-Michael/1,6-addition reactions of ortho-hydroxyphenylsubstituted para-quinone methides with barbiturate-based olefins. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130752] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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5
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Schmid J, Junge T, Lang J, Frey W, Peters R. Polyfunktionelle Bis‐Lewis‐Säure‐/Bis‐Triazolium‐Katalysatoren zur stereoselektiven 1,4‐Addition von 2‐Oxindolen an Maleimide. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814453] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Juliane Schmid
- Universität StuttgartInstitut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Thorsten Junge
- Universität StuttgartInstitut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Johannes Lang
- Universität StuttgartInstitut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Wolfgang Frey
- Universität StuttgartInstitut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - René Peters
- Universität StuttgartInstitut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Deutschland
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6
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Schmid J, Junge T, Lang J, Frey W, Peters R. Polyfunctional Bis-Lewis-Acid-/Bis-Triazolium Catalysts for Stereoselective 1,4-Additions of 2-Oxindoles to Maleimides. Angew Chem Int Ed Engl 2019; 58:5447-5451. [PMID: 30742732 DOI: 10.1002/anie.201814453] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Indexed: 01/19/2023]
Abstract
Achieving enzyme-like catalytic activity and stereoselectivity without the typically high substrate specificity of enzymes is a challenge in the development of artificial catalysts for asymmetric synthesis. Polyfunctional catalysts are considered to be a promising tool for achieving excellent catalytic efficiency. A polyfunctional catalyst system was developed, which incorporates two Lewis acidic/Brønsted basic cobalt centers in combination with triazolium moieties that are crucial for high reactivity and excellent stereoselectivity in the direct 1,4-addition of oxindoles to maleimides. The catalyst is assembled through click chemistry and is readily recyclable through precipitation by making use of its charges. Kinetic studies support a cooperative mode of action. Diastereodivergency is achievable with either Boc-protected or unprotected maleimide.
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Affiliation(s)
- Juliane Schmid
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Thorsten Junge
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Johannes Lang
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Wolfgang Frey
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - René Peters
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
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7
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Ye Z, Bai L, Bai Y, Gan Z, Zhou H, Pan T, Yu Y, Zhou J. High diastereoselective synthesis of spiro-isoxazolonechromans via domino oxa-Michael/1,6-addition reactions of ortho-hydroxyphenylsubstituted para-quinone methides with unsaturated isoxazolones. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.064] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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8
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Sumiyoshi T, Ishida K, Shimizu M, Yamai YS, Natsutani I, Uesato S, Nagaoka Y. Asymmetric Synthesis of t-Butyl 3-Alkyl-oxindole-3-carboxylates via Chiral Phosphoric Acid Catalyzed Desymmetrization of Di-t-butyl 2-Alkyl-2-(2-aminophenyl)malonates. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)87] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Facile synthesis of 3-aryl 2,3-dihydrobenzofurans via novel domino 1,6-addition/O-alkylation reactions of para-quinone methides. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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10
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Dalpozzo R. Recent Catalytic Asymmetric Syntheses of 3,3-Disubstituted Indolin-2-ones and 2,2-Disubstituted Indolin-3-ones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700361] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Renato Dalpozzo
- Dipartimento di Chimica e Tecnologie Chimiche; Università della Calabria; 87030 Arcavacata di Rende (Cs Italy
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11
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Liu S, Maruoka K, Shirakawa S. Chiral Tertiary Sulfonium Salts as Effective Catalysts for Asymmetric Base-Free Neutral Phase-Transfer Reactions. Angew Chem Int Ed Engl 2017; 56:4819-4823. [PMID: 28371093 DOI: 10.1002/anie.201612328] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/07/2017] [Indexed: 01/08/2023]
Abstract
Although chiral quaternary ammonium and phosphonium salts are commonly used for asymmetric organocatalysis, the catalytic ability of chiral tertiary sulfonium salts has yet to be demonstrated in asymmetric synthesis. Herein, we show that chiral bifunctional trialkylsulfonium salts catalyze highly enantioselective conjugate additions of 3-substituted oxindoles to maleimides under base-free neutral phase-transfer conditions.
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Affiliation(s)
- Shiyao Liu
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Seiji Shirakawa
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
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12
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Liu S, Maruoka K, Shirakawa S. Chiral Tertiary Sulfonium Salts as Effective Catalysts for Asymmetric Base-Free Neutral Phase-Transfer Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612328] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shiyao Liu
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Keiji Maruoka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
| | - Seiji Shirakawa
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
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13
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Yang P, Wang X, Chen F, Zhang ZB, Chen C, Peng L, Wang LX. Organocatalytic Enantioselective Michael/Cyclization Domino Reaction between 3-Amideoxindoles and α,β-Unsaturated Aldehydes: One-Pot Preparation of Chiral Spirocyclic Oxindole-γ-lactams. J Org Chem 2017; 82:3908-3916. [DOI: 10.1021/acs.joc.6b03090] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Peng Yang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Xiao Wang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Feng Chen
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Zheng-Bing Zhang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Chao Chen
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Lin Peng
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Li-Xin Wang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
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14
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Zhou J, Bai L, Liang G, Chen Y, Gan Z, Wang W, Zhou H, Yu Y. Organocatalytic asymmetric domino Michael/O-alkylation reaction for the construction of succinimide substituted 3(2H)-furanones catalyzed by quinine. RSC Adv 2017. [DOI: 10.1039/c7ra07317h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Asymmetric domino reaction of maleimides with γ-halogenated-β-ketoesters catalyzed by quinine is developed to give succinimide substituted 3(2H)-furanones in good enantioselectivities.
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Affiliation(s)
- Jing Zhou
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Lijuan Bai
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Guojuan Liang
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Yongjie Chen
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Zongjie Gan
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Wu Wang
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Hui Zhou
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
| | - Yu Yu
- School of Pharmaceutical Science
- Chongqing Research Center for Pharmaceutical Engineering
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- Chongqing Medical University
- Chongqing 400016
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15
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Ji SP, Liu LW, Chen F, Ren HX, Yang Y, Zhang ZB, Peng L, Wang LX. Enantioselective Nitroso Aldol Intramolecular Transesterification Cyclization Domino Reaction for Highly Effective Construction of Chiral Spirooxindoles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600884] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shan-Ping Ji
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
- University of Chinese Academy of Sciences; 100039 Beijing P. R. China
| | - Lin-Wei Liu
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
- University of Chinese Academy of Sciences; 100039 Beijing P. R. China
| | - Feng Chen
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
- University of Chinese Academy of Sciences; 100039 Beijing P. R. China
| | - Hong-Xia Ren
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
- University of Chinese Academy of Sciences; 100039 Beijing P. R. China
| | - Yu Yang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
- University of Chinese Academy of Sciences; 100039 Beijing P. R. China
| | - Zheng-Bing Zhang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
- University of Chinese Academy of Sciences; 100039 Beijing P. R. China
| | - Lin Peng
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
| | - Li-Xin Wang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province; Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; 610041 Chengdu People's Republic of China
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16
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Feng HX, Tan R, Liu YK. An Efficient One-Pot Approach to the Construction of Chiral Nitrogen-Containing Heterocycles under Mild Conditions. Org Lett 2015. [DOI: 10.1021/acs.orglett.5b01772] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Huan-Xi Feng
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Rui Tan
- School
of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P. R. China
| | - Yan-Kai Liu
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
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17
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Chen L, You Y, Zhang ML, Zhao JQ, Zuo J, Zhang XM, Yuan WC, Xu XY. Organocatalytic asymmetric Michael addition of 3-substituted oxindoles to α,β-unsaturated acyl phosphonates for the synthesis of 3,3′-disubstituted oxindoles with chiral squaramides. Org Biomol Chem 2015; 13:4413-7. [DOI: 10.1039/c5ob00317b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The first Michael addition of 3-monosubstituted oxindoles to α,β-unsaturated acyl phosphonates is investigated to give 3,3′-disubstituted oxindoles with excellent results.
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Affiliation(s)
- Lin Chen
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Yong You
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Ming-Liang Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Jian-qiang Zhao
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Jian Zuo
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
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18
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Shirakawa S, Makino H, Yoshidome T, Maruoka K. Effect of Brønsted acid co-catalyst in asymmetric conjugate addition of 3-aryloxindoles to maleimide under base-free phase-transfer conditions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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