Simple chiral primary amine-thiourea catalysts derived from chiral 1,2-diphenylethylenediamine were found to catalyze direct Michael addition of aromatic ketones to nitroolefins with good enantioselectives (up to 86% ee) and excellent yields (up to 97%) for a broad range of substrates and successfully used in the preparation of (R)-Balcofen.
简单的手性一级胺-
硫脲催化剂来源于手性1,2-
二苯乙烯二胺,已被发现能够以良好的手性选择性(最高可达86% ee)和优异的产率(最高可达97%)催化
芳香酮与硝基烯烃的直接迈克尔加成,适用于广泛的底物,并成功用于(R)-Balcofen的制备。