Catalytic Chemoselective Conjugate Addition of Amino Alcohols to α,β-Unsaturated Ester: Hydroxy Group over Amino Group and Conjugate Addition over Transesterification
作者:Zhao Li、Masamichi Tamura、Ryo Yazaki、Takashi Ohshima
DOI:10.1248/cpb.c16-00333
日期:——
chemoselective conjugate addition of amino alcohols to alpha,beta-unsaturated ester using a soft Lewis acid/hard Bronsted base cooperative catalyst was developed. This catalysis achieved chemoselective addition of a hydroxy group over an amino group. Moreover, soft metal alkoxide generation enabled chemoselective soft conjugate addition over hard transesterification. Various amino alcohols, including unprecedented
开发了使用软路易斯酸/硬质布朗斯台德碱协同催化剂将氨基醇高化学选择性共轭加成至α,β-不饱和酯的方法。该催化实现了在氨基上化学选择性加成羟基。此外,与硬酯交换反应相比,生成软金属醇盐可实现化学选择性的软共轭物添加。各种氨基醇,包括前所未有的环状β-氨基醇,都可用于本发明的催化。