A chiral thioureido acid as an effective additive for enantioselective organocatalytic Michael additions of nitroolefins
作者:Dan-Qian Xu、Hua-Dong Yue、Shu-Ping Luo、Ai-Bao Xia、Shuai Zhang、Zhen-Yuan Xu
DOI:10.1039/b804541k
日期:——
A novel and effective organocatalytic system consisting of pyrrolidinyl-thioimidazole and a chiral thioureido acid efficiently catalyzed the asymmetric Michael addition reactions of ketones to nitroolefins to afford the adducts with high diastereoselectivities (up to 99 : 1) and excellent enantioselectivities (up to 99% ee).
由吡咯烷基-硫代咪唑和手性硫脲基酸组成的新型有效有机催化体系可有效催化酮与硝基烯烃的不对称迈克尔加成反应,从而提供具有高非对映选择性(高达99:1)和出色的对映选择性(高达99%ee)的加合物。 )。