A Recyclable Organocatalyst for Asymmetric Michael Addition of Acetone to Nitroolefins
作者:Aidang Lu、Tao Liu、Ronghua Wu、Youming Wang、Guiping Wu、Zhenghong Zhou、Jianxin Fang、Chuchi Tang
DOI:10.1021/jo2002819
日期:2011.5.20
Based on different chiral diamine skeletons, a series of bifunctional primary amine-thiophosphoramides were synthesized and screened as the catalysts for the asymmetric Michael addition of acetone to both aromatic and aliphatic nitroolefins. Under the catalysis of a thiophosphoramide derived from 1,2-diphenylethane-1,2-diamine, the corresponding adducts were obtained in high yields (up to >99%) with
基于不同的手性二胺骨架,合成了一系列双官能的伯胺-硫代磷酰胺,并筛选了丙酮不对称地将迈克尔加成至芳族和脂族硝基烯烃的催化剂。在衍生自1,2-二苯基乙烷-1,2-二胺的硫代磷酰胺的催化下,在温和的反应条件下,可以以高收率(高达> 99%)和优异的对映选择性(97-99%ee)获得相应的加合物。此外,可以通过简单的相分离来回收催化剂,并至少重复使用五次,而不会损失催化活性和立体控制。