Asymmetric Michael addition reaction of 3-substituted-N-Boc oxindoles to activated terminal alkenes catalyzed by a bifunctional tertiary-amine thiourea catalyst
作者:Xin Li、Zhi-Guo Xi、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1039/b918644a
日期:——
article reports an organocatalytic strategy for the asymmetric catalysis of chiral oxindoles bearing 3-position all-carbonquaternarystereocenters. Accordingly, highly enantioselectiveMichaeladdition reactions of 3-substituted oxindoles to terminal alkenes have been developed by utilizing a bifunctional tertiary-amine thiourea catalyst. The reactions accommodate a number of Michael donor compounds