Asymmetric synthesis of cyclopropylmethanamines by rhodium-catalyzed cyclopropanation of pinacol allylboronate with N-sulfonyl-1,2,3-triazoles

Abstract

Herein, the rhodium(II)-catalyzed cyclopropanation reaction of pinacol allylboronate with N-sulfonyl-1,2,3-triazoles is reported. Boryl-substituted cyclopropylmethanamines are produced in a highly diastereo- and enantioselective manner. Various cyclopropylmethanamines containing a quaternary stereocenter are derived from them.