Volume 39, Issue 7 pp. 1916-1922
Concise Report

Asymmetric Synthesis of Chiral 1,3-Disubstituted Allylsilanes via Copper(I)-Catalyzed 1,4-Conjugate Silylation of α,β-Unsaturated Sulfones and Subsequent Julia-Kocienski Olefination

Xian-Liang Wang

Xian-Liang Wang

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai, 200444 China

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Xing-Hao Yin

Xing-Hao Yin

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Jun-Zhao Xiao

Jun-Zhao Xiao

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Xue-Shun Jia

Xue-Shun Jia

Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai, 200444 China

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Liang Yin

Corresponding Author

Liang Yin

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

E-mail: [email protected]Search for more papers by this author
First published: 19 March 2021
Citations: 7

Main observation and conclusion

A general synthesis of chiral 1,3-disubstituted allylsilanes is established through copper(I)-catalyzed asymmetric 1,4-conjugate silylation of α,β-unsaturated sulfones and subsequent Julia-Kocienski olefination. By modification of McQuade's NHC ligand, the catalytic asymmetric conjugate silylation with a broad substrate scope is achieved in high enantioselectivity. The following Julia-Kocienski olefination proceeds smoothly at room temperature to deliver an array of chiral allylsilanes in moderate yields. More interestingly, a one-pot asymmetric synthesis with high synthetic efficiency is successfully realized. Utility of the prepared chiral 1,3-disubsituted allylsilanes is demonstrated in the asymmetric allylation of both aldehyde and aldimine. Finally, an interesting “match and mismatch” phenomenon is observed in the asymmetric allylation of chiral aldehydes.image

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