Volume 57, Issue 50 pp. 16554-16558
Communication

Bimetallic Rhodium(II)/Indium(III) Relay Catalysis for Tandem Insertion/Asymmetric Claisen Rearrangement

Yushuang Chen

Yushuang Chen

Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064 China

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Prof. Dr. Shunxi Dong

Prof. Dr. Shunxi Dong

Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064 China

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Xi Xu

Xi Xu

Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064 China

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Prof. Dr. Xiaohua Liu

Prof. Dr. Xiaohua Liu

Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064 China

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Prof. Dr. Xiaoming Feng

Corresponding Author

Prof. Dr. Xiaoming Feng

Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064 China

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First published: 20 October 2018
Citations: 68

Graphical Abstract

A highly efficient asymmetric tandem reaction of N-sulfonyl-1,2,3-triazoles with two types of allyl alcohol esters was achieved by using a bimetallic rhodium(II)/chiral N,N′-dioxide–indium(III) complex catalyst. A series of β/γ-amino acid derivatives bearing different substituents were obtained in a good to excellent diastereo- and enantioselective manner.

Abstract

The first example of catalytic insertion/asymmetric Claisen rearrangement tandem reaction of N-sulfonyl-1,2,3-triazoles with allyl alcohol esters was achieved by bimetallic relay catalytic systems involving achiral rhodium salt and chiral N,N′-dioxide–indium(III) complex. This manifold could overcome the limitation of single RhII catalysis, providing a straight and facile route to various enantioenriched β/γ-amino acid derivatives in high yields (up to 99 %) with excellent diastereo- and enantioselectivities (up to >95:5 dr, 98:2 er). Moreover, possible transition state models were proposed to elucidate the origin of chiral induction based on the control experiments and X-ray crystal structure of the catalyst.

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