An Organocatalytic Michael–Michael Cascade for the Enantioselective Construction of Spirocyclopentane Bioxindoles: Control of Four Contiguous Stereocenters
作者:Wangsheng Sun、Liang Hong、Gongming Zhu、Zilong Wang、Xiaojin Wei、Jingman Ni、Rui Wang
DOI:10.1021/ol4034226
日期:2014.1.17
An organocatalytic Michael–Michael cascade for the enantioselectiveconstruction of spirocyclopentanebioxindoles was developed in moderate to good yield with good diastereoselectivities and excellent enantioselectivities. The straightforward process, catalyzed by a bifunctional chiral squaramide catalyst, serves as a powerful tool for the enantioselectiveconstruction of potentially biological bioxindoles