Asymmetric Ring-Opening of Donor–Acceptor Cyclopropanes with Primary Arylamines Catalyzed by a Chiral Heterobimetallic Catalyst

Weiwei Luo,Zhicheng Sun,E. H. N. Fernando,Vladimir N. Nesterov,T. Cundari,Hong Wang

Published 2019 in ACS Catalysis

ABSTRACT

An efficient catalytic asymmetric ring-opening reaction of donor–acceptor cyclopropanes with primary arylamines was developed. The reaction was achieved through the utilization of a chiral heterobimetallic catalyst, delivering a variety of chiral γ-amino acid derivatives in up to 93% yield and 99% ee. Stereochemical experiments suggest a dominant role for kinetic resolution in this asymmetric process, which is supported by a computational study of the reaction coordinate. A class of chiral bimetallic Lewis acid catalysts formed through a ligand exchange/transmetalation process was introduced in this work. The symmetric structure of the bimetallic catalyst, i.e., Yb(OTf)3-Yb[P]3, was confirmed with X-ray crystallography.

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