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Wang YC, Xiao ZX, Wang M, Yang SQ, Liu JB, He ZT. Umpolung Asymmetric 1,5-Conjugate Addition via Palladium Hydride Catalysis. Angew Chem Int Ed Engl 2023; 62:e202215568. [PMID: 36374273 DOI: 10.1002/anie.202215568] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Indexed: 11/16/2022]
Abstract
Electronically matched nucleophilic 1,6-conjugate addition has been well studied and widely applied in synthetic areas. In contrast, nucleophilic 1,5-conjugate addition represents an electronically forbidden process and is considered unfeasible. Here, we describe modular protocols for 1,5-conjugate addition reactions via palladium hydride catalysis. Both palladium and synergistic Pd/organocatalyst systems are developed to catalyze 1,5-conjugate reaction, followed by inter- or intramolecular [3+2] cyclization. A migratory 1,5-addition protocol is established to corroborate the feasibility of this umpolung concept. The 1,5-addition products are conveniently transformed into a series of privileged enantioenriched motifs, including polysubstituted tetrahydrofuran, dihydrofuran, cyclopropane, cyclobutane, azetidine, oxetane, thietane, spirocycle and bridged rings. Preliminary mechanistic studies corroborate the involvement of palladium hydride catalysis.
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Affiliation(s)
- Yu-Chao Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhao-Xin Xiao
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Miao Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Shao-Qian Yang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jin-Biao Liu
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhi-Tao He
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
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Cera G, Maestri G. Palladium/Brønsted Acid Catalysis for Hydrofunctionalizations of Alkynes: from Tsuji‐Trost Allylations to Stereoselective Methodologies. ChemCatChem 2022. [DOI: 10.1002/cctc.202200295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gianpiero Cera
- Universita degli Studi di Parma Dipartimento delle Scienze Chimiche, della Vita e della Sostenibilità Ambientale Parco Area delle Scienze, 17/A 43124 Parma ITALY
| | - Giovanni Maestri
- University of Parma: Universita degli Studi di Parma Dipartimento delle Scienze Chimiche, della Vita e della Sostenibilità Ambientale Parco Area delle Scienze, 17/A 43124 Parma ITALY
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Jiang WS, Ji DW, Zhang WS, Zhang G, Min XT, Hu YC, Jiang XL, Chen QA. Orthogonal Regulation of Nucleophilic and Electrophilic Sites in Pd-Catalyzed Regiodivergent Couplings between Indazoles and Isoprene. Angew Chem Int Ed Engl 2021; 60:8321-8328. [PMID: 33463001 DOI: 10.1002/anie.202100137] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Indexed: 12/29/2022]
Abstract
Depending on the reactant property and reaction mechanism, one major regioisomer can be favored in a reaction that involves multiple active sites. Herein, an orthogonal regulation of nucleophilic and electrophilic sites in the regiodivergent hydroamination of isoprene with indazoles is demonstrated. Under Pd-hydride catalysis, the 1,2- or 4,3-insertion pathway with respect to the electrophilic sites on isoprene could be controlled by the choice of ligands. In terms of the nucleophilic sites on indazoles, the reaction occurs at either the N1 - or N2 -position of indazoles is governed by the acid co-catalysts. Preliminary experimental studies have been performed to rationalize the mechanism and regioselectivity. This study not only contributes a practical tool for selective functionalization of isoprene, but also provides a guide to manipulate the regioselectivity for the N-functionalization of indazoles.
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Affiliation(s)
- Wen-Shuang Jiang
- Department of Medicinal Chemistry, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China.,Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Wei-Song Zhang
- Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Gong Zhang
- Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Xiang-Ting Min
- Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Yan-Cheng Hu
- Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Xu-Liang Jiang
- Department of Medicinal Chemistry, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
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4
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Jiang W, Ji D, Zhang W, Zhang G, Min X, Hu Y, Jiang X, Chen Q. Orthogonal Regulation of Nucleophilic and Electrophilic Sites in Pd‐Catalyzed Regiodivergent Couplings between Indazoles and Isoprene. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100137] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Wen‐Shuang Jiang
- Department of Medicinal Chemistry Shenyang Pharmaceutical University 103 Wenhua Road Shenyang 110016 China
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Ding‐Wei Ji
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Wei‐Song Zhang
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Gong Zhang
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Xiang‐Ting Min
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Yan‐Cheng Hu
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Xu‐Liang Jiang
- Department of Medicinal Chemistry Shenyang Pharmaceutical University 103 Wenhua Road Shenyang 110016 China
| | - Qing‐An Chen
- Dalian Institute of Chemical Physics University of Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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