作者:Takuya Hashimoto、Hidenori Kimura、Yu Kawamata、Keiji Maruoka
DOI:10.1002/anie.201201905
日期:2012.7.16
An unconventional Ugi: A catalytic asymmetric Ugi‐type reaction can be realized by use of N′‐alkylbenzohydrazide, instead of a conventional amine, in the presence of an axially chiral dicarboxylic acid. The reaction proceeds through a key acyclic azomethine imine intermediate, which has recently emerged as a promising electrophile in asymmetric catalysis.
非常规的Ugi:在轴向手性二羧酸的存在下,通过使用N′-烷基苯甲酰肼代替常规的胺,可以实现催化不对称的Ugi型反应。该反应通过关键的无环偶氮甲亚胺亚胺中间体进行,该中间体最近在不对称催化中作为有希望的亲电试剂出现。