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Nong ZS, Chen XR, Wang PS, Hong X, Gong LZ. Enantioconvergent Palladium-Catalyzed Alkylation of Tertiary Allylic C-H Bonds. Angew Chem Int Ed Engl 2023; 62:e202312547. [PMID: 37752890 DOI: 10.1002/anie.202312547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 09/28/2023]
Abstract
Enantioconvergent catalysis enables the conversion of racemic molecules into a single enantiomer in perfect yield and is considered an ideal approach for asymmetric synthesis. Despite remarkable advances in this field, enantioconvergent transformations of inert tertiary C-H bonds remain largely unexplored due to the high bond dissociation energy and the surrounding steric repulsion that pose unparalleled constraints on bond cleavage and formation. Here, we report an enantioconvergent Pd-catalyzed alkylation of racemic tertiary allylic C-H bonds of α-alkenes, providing a unique approach to access a broad range of enantioenriched γ,δ-unsaturated carbonyl compounds featuring quaternary carbon stereocenters. Mechanistic studies reveal that a stereoablative event occurs through the rate-limiting cleavage of tertiary allylic C-H bonds to generate σ-allyl-Pd species, and the achieved E/Z-selectivity of σ-allyl-Pd species effectively regulates the diastereoselectivity via a nucleophile coordination-enabled SN 2'-allylation pathway.
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Affiliation(s)
- Zhong-Sheng Nong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Xin-Ran Chen
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Pu-Sheng Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Xin Hong
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei, 230026, China
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Xia A, Qi X, Mao X, Wu X, Yang X, Zhang R, Xiang Z, Lian Z, Chen Y, Yang S. Metal-Free Aerobic Oxidative Selective C-C Bond Cleavage in Heteroaryl-Containing Primary and Secondary Alcohols. Org Lett 2019; 21:3028-3033. [PMID: 30995066 DOI: 10.1021/acs.orglett.9b00563] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A transition-metal-free aerobic oxidative selective C-C bond-cleavage reaction in primary and secondary heteroaryl alcohols is reported. This reaction was highly efficient and tolerated various heteroaryl alcohols, generating a carboxylic acid derivative and a neutral heteroaromatic compound. Experimental studies combined with density functional theory calculations revealed the mechanism underlying the selective C-C bond cleavage. This strategy also provides an alternative simple approach to carboxylation reaction.
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Affiliation(s)
- Anjie Xia
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Xueyu Qi
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Xin Mao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Xiaoai Wu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Xin Yang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Rong Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Zhiyu Xiang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Zhong Lian
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Yingchun Chen
- West China School of Pharmacy , Sichuan University , Chengdu , Sichuan 610041 , China
| | - Shengyong Yang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital , Sichuan University , Chengdu , Sichuan 610041 , China
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Fan J, Wang S, Chen J, Wu M, Zhang J, Xie M. Synthesis of 2-acetyl trisubstituted furans via copper-mediated deacylation cleavage of unstrained C(sp3)–C(sp2) bonds. Org Chem Front 2019. [DOI: 10.1039/c8qo01139g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A copper-mediated tandem addition/cyclization/carbon–carbon cleavage reaction for the convenient synthesis of 2-acyl trisubstituted furans has been developed.
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Affiliation(s)
- Jian Fan
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Shengke Wang
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Jiahui Chen
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Manyi Wu
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Jitan Zhang
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Meihua Xie
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
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