51
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Liu K, Yang J, Li X. Palladium-Catalyzed Diastereo- and Enantioselective [3 + 2] Cycloaddition of Vinylcyclopropanes with Azadienes: Efficient Access to Chiral Spirocycles. Org Lett 2021; 23:826-831. [DOI: 10.1021/acs.orglett.0c04062] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kai Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jianfeng Yang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Xiaoxun Li
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
- Suzhou Institute of Shandong University, NO. 388 Ruoshui Road, SIP, Suzhou, Jiangsu 215123, China
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52
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de la Cruz-Sánchez P, Pàmies O. Metal-π-allyl mediated asymmetric cycloaddition reactions. ADVANCES IN CATALYSIS 2021. [DOI: 10.1016/bs.acat.2021.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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53
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Koay WL, Mei GJ, Lu Y. Facile access to benzofuran-fused tetrahydropyridines via catalytic asymmetric [4 + 2] cycloaddition of aurone-derived 1-azadienes with 3-vinylindoles. Org Chem Front 2021. [DOI: 10.1039/d0qo01236j] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective [4 + 2] cycloaddition reaction of 1-azadienes with 3-vinylindoles, catalyzed by chiral phosphoric acid has been developed to furnish a range of benzofuran-fused tetrahydropyridines with three contiguous stereogenic centers.
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Affiliation(s)
- Wai Lean Koay
- Department of Chemistry
- National University of Singapore
- Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS)
- National University of Singapore
| | - Guang-Jian Mei
- Department of Chemistry
- National University of Singapore
- Singapore
| | - Yixin Lu
- Department of Chemistry
- National University of Singapore
- Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS)
- National University of Singapore
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54
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Niu B, Wei Y, Shi M. Recent advances in annulation reactions based on zwitterionic π-allyl palladium and propargyl palladium complexes. Org Chem Front 2021. [DOI: 10.1039/d1qo00273b] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Carbocyclic and heterocyclic compounds could be constructed through the palladium-catalyzed annulation reactions of zwitterionic π-allyl palladium or propargyl palladium complexes with unsaturated electrophiles.
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Affiliation(s)
- Ben Niu
- State Key Laboratory of Organometallic Chemistry
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Yin Wei
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- People's Republic of China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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55
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Trost BM, Jiao Z. Palladium-Catalyzed Enantioselective Cycloaddition of Carbonylogous 1,4-Dipoles: Efficient Access to Chiral Cyclohexanones. J Am Chem Soc 2020; 142:21645-21650. [DOI: 10.1021/jacs.0c11535] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Zhiwei Jiao
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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56
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Trost BM, Zuo Z, Schultz JE. Transition-Metal-Catalyzed Cycloaddition Reactions to Access Seven-Membered Rings. Chemistry 2020; 26:15354-15377. [PMID: 32705722 DOI: 10.1002/chem.202002713] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/12/2020] [Indexed: 02/06/2023]
Abstract
The efficient and selective synthesis of functionalized seven-membered rings remains an important pursuit within synthetic organic chemistry, as this motif appears in numerous drug-like molecules and natural products. Use of cycloaddition reactions remains an attractive approach for their construction within the perspective of atom and step economy. Additionally, the ability to combine multiple components in a single reaction has the potential to allow for efficient combinatorial strategies of diversity-oriented synthesis. The inherent entropic penalty associated with achieving these transformations has impressively been overcome with development of catalysis, whereby the reaction components can be pre-organized through activation by transition-metal-catalysis. The fine-tuning of metal/ligand combinations as well as reaction conditions allows for achieving chemo-, regio-, diastereo- and enantioselectivity in these transformations. Herein, we discuss recent advances in transition-metal-catalyzed construction of seven-membered rings via combination of 2-4 components mediated by a variety of metals. An emphasis is placed on the mechanistic aspects of these transformations to both illustrate the state of the science and to highlight the unique application of novel processes of transition-metals in these transformations.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA
| | - Zhijun Zuo
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA
| | - Johnathan E Schultz
- Chemical Process Development, Bristol Myers Squibb, New Brunswick, NJ, 08901, USA
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57
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Trost BM, Jiao Z, Liu Y, Min C, Hung CIJ. Palladium-Catalyzed Enantioselective Cycloadditions of Aliphatic 1,4-Dipoles: Access to Chiral Cyclohexanes and Spiro [2.4] heptanes. J Am Chem Soc 2020; 142:18628-18636. [DOI: 10.1021/jacs.0c08348] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Zhiwei Jiao
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Ying Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, P. R. China
| | - Chang Min
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Chao-I. Joey Hung
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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58
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Yang W, Huang Z, Liu Y, Yu X, Deng W. Highly Regio‐, Diastereo‐, and Enantioselective Assembly of Azepino[2,3‐
b
]indoles
via
Palladium‐Catalyzed
[4 + 3] Cycloaddition
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000264] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Wu‐Lin Yang
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Zesheng Huang
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Yang‐Zi Liu
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Xingxin Yu
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Wei‐Ping Deng
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University Jinhua Zhejiang 321004 China
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59
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Zhou J, Li T, Sun Y, Du B, Tan W, Shi F. Chiral Brønsted Acid‐Catalyzed Asymmetric 1,4‐Addition of Benzofuran‐Derived Azadienes with 3‐Substituted indoles. ChemCatChem 2020. [DOI: 10.1002/cctc.202000810] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ji Zhou
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 R. P. China
| | - Tian‐Zhen Li
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 R. P. China
| | - Yu‐Wen Sun
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 R. P. China
| | - Bai‐Xiang Du
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 R. P. China
| | - Wei Tan
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 R. P. China
| | - Feng Shi
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 R. P. China
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60
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Deng Q, Meng X. Recent Advances in the Cycloaddition Reactions of 2‐Benzylidene‐1‐benzofuran‐3‐ones, and Their Sulfur, Nitrogen and Methylene Analogues. Chem Asian J 2020; 15:2838-2853. [DOI: 10.1002/asia.202000550] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/13/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Qingsong Deng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
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61
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Trost BM, Mata G. Forging Odd-Membered Rings: Palladium-Catalyzed Asymmetric Cycloadditions of Trimethylenemethane. Acc Chem Res 2020; 53:1293-1305. [PMID: 32525684 DOI: 10.1021/acs.accounts.0c00152] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The catalytic asymmetric synthesis of complex molecules has been the focus of our research program for several decades because such strategies have significant utility for the construction of chiral building blocks for drug development as well as the total synthesis of natural products. Cycloaddition reactions are very powerful transformations in organic synthesis providing access to highly functionalized motifs from simple starting materials. In concert with this central interest, four decades ago, we reported the palladium-catalyzed trimethylenemethane (TMM) cycloaddition for forging odd-membered ring systems. In recent years, we focused our attention on the development of powerful ligand scaffolds which enable the preparation of valuable products with complete control of chemo-, regio-, diastereo-, and enantioselectivity, thereby addressing several limitations in the field of palladium-catalyzed asymmetric cycloadditions. The first section of this Account will outline the discovery of a new class of highly modular pyrrolidine-based phosphoramidite and diamidophosphite chiral ligands which facilitate [3 + 2] cycloadditions of TMM donors, opening a new area in asymmetric construction of five-membered rings.The formation of the Pd-TMM zwitterionic intermediates is driven by the unique charge distribution of the cationic π-allyl motif, in which the most electropositive central carbon stabilizes the neighboring carbanion generated by either desilylation or deprotonation. The second section of this Account summarizes the scope of cycloadditions between Pd-TMM zwitterionic intermediates generated via desilylation and a variety of electron-deficient acceptors to access cyclopentanes, pyrrolidines and tetrahydrofurans. This section also includes the use of nitrile-, vinyl-, alkynyl- and allene-substituted TMM donors to rapidly generate cycloadducts with high molecular complexity. The extension of this strategy to include [6 + 3] cycloadditions and dearomative processes will also be presented. The third section will discuss a new generation of TMM donors substituted with electron-withdrawing groups such as nitrile, benzophenone imine, trifluoromethyl, and phosphonate, where the Pd-TMM zwitterionic intermediates are generated via deprotonation of the acidic C-H bond adjacent to the π-allyl motif. This new strategy has enabled the synthesis of heterocycles with increased numbers of functional groups in highly asymmetric and atom-economic fashion.Throughout this Account, we will describe the implementation of these transformations toward the rapid assembly of drug candidates and the total synthesis of natural products such as (-)-marcfortine C. We will also give details of mechanistic studies regarding relevant intermediates within the catalytic cycles of the different strategies, which allowed us to better understand the origin of selectivity with various donors.
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
| | - Guillaume Mata
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
- Arcus Biosciences, Inc., 3928 Point Eden Way, Hayward, California 94545, United States
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62
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Zhou SJ, Sun M, Wang JY, Yu XY, Lu H, Zhang YC, Shi F. Metal-Catalyzed Regiospecific (4+3) Cyclization of 2-Indolylmethanols with ortho
-Quinone Methides. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000693] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Si-Jia Zhou
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
| | - Meng Sun
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
| | - Jing-Yi Wang
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
| | - Xian-Yang Yu
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
| | - Han Lu
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
| | - Yu-Chen Zhang
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
| | - Feng Shi
- School of Chemistry and Materials Science; Jiangsu Normal University; 221116 Xuzhou China
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63
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Fang QY, Yi MH, Wu XX, Zhao LM. Regio- and Diastereoselective Spirocyclopropanation of Benzofuran-Derived Azadienes through 1,4-Addition-Induced Dearomatization Reaction under Mild Conditions. Org Lett 2020; 22:5266-5270. [DOI: 10.1021/acs.orglett.0c01987] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qing-Yun Fang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Meng-Hao Yi
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Xiao-Xia Wu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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64
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Xu D, Li H, Pan G, Huang P, Oberkofler J, Reich RM, Kühn FE, Guo H. Visible-Light-Induced Dehydrohalogenative Coupling for Intramolecular α-Alkenylation: A Way to Build Seven- and Eight-Membered Rings. Org Lett 2020; 22:4372-4377. [DOI: 10.1021/acs.orglett.0c01391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Dawen Xu
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P.R. China
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Han Li
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Guangxing Pan
- Academic for Engineering and Technology, Fudan University, 220 Handan Road, Shanghai, 200438, P.R. China
| | - Pan Huang
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Jens Oberkofler
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Robert M. Reich
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Fritz E. Kühn
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Hao Guo
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P.R. China
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65
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Yan RJ, Liu BX, Xiao BX, Du W, Chen YC. Asymmetric (4 + 3) and (4 + 1) Annulations of Isatin-derived Morita–Baylis–Hillman Carbonates to Construct Diverse Chiral Heterocyclic Frameworks. Org Lett 2020; 22:4240-4244. [PMID: 32412770 DOI: 10.1021/acs.orglett.0c01283] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ru-Jie Yan
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Bao-Xin Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ben-Xian Xiao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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66
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Zheng X, Sun H, Yang WL, Deng WP. Elaboration of phosphoramidite ligands enabling palladium-catalyzed diastereo- and enantioselective all carbon [4+3] cycloaddition. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9718-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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67
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Ahn HI, Park JU, Xuan Z, Kim JH. Pd-Catalyzed asymmetric [5 + 2] cycloaddition of vinylethylene carbonates and cyclic imines: access to N-fused 1,3-oxazepines. Org Biomol Chem 2020; 18:9826-9830. [DOI: 10.1039/d0ob02159h] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile route to access enantioenriched N-fused 1,3-oxazepines via Pd-catalyzed asymmetric [5 + 2] cycloaddition of vinylethylene carbonates and cyclic imines has been developed.
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Affiliation(s)
- Hye-In Ahn
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
| | - Jong-Un Park
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
| | - Zi Xuan
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
| | - Ju Hyun Kim
- Department of Chemistry (BK21)
- Research Institute of Natural Science
- Gyeongsang National University
- 52828, Jinju
- Korea
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68
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Fang QY, Zhao LM. A [4+3] annulation of benzofuran-derived azadienes and α-bromohydroxamates for the synthesis of benzofuran-fused 1,4-diazepinones. Chem Commun (Camb) 2020; 56:14079-14082. [DOI: 10.1039/d0cc06061e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Cs2CO3-mediated formal [4+3] cycloaddition involving benzofuran-derived azadienes (BDAs) and α-bromohydroxamates to afford benzofuran-fused 1,4-diazepinones is established.
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Affiliation(s)
- Qing-Yun Fang
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou 221116
- China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou 221116
- China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
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