Direct Catalytic Asymmetric Vinylogous Michael Reaction of α,β-Unsaturated γ-Butyrolactam under Dinuclear Nickel Schiff Base Catalysis
摘要:
Direct catalytic asymmetric vinylogous Michael reaction is described. 2.5 mol % of homobimetallic (S)-Ni-2-Schiff base complex efficiently catalyzed the addition of alpha,beta-unsaturated gamma-butyrolactam to nitroalkenes under simple proton transfer conditions, giving vinylogous Michael products in 83-99% yield, 16:1-> 30:1 dr, and 96-99% ee.
Direct Catalytic Asymmetric Vinylogous Michael Reaction of α,β-Unsaturated γ-Butyrolactam under Dinuclear Nickel Schiff Base Catalysis
作者:Shigeki Matsunaga、Masakatsu Shibasaki、Hirooki Tanabe、Yingjie Xu、Bo Sun
DOI:10.3987/com-12-s(n)58
日期:——
Direct catalytic asymmetric vinylogous Michael reaction is described. 2.5 mol % of homobimetallic (S)-Ni-2-Schiff base complex efficiently catalyzed the addition of alpha,beta-unsaturated gamma-butyrolactam to nitroalkenes under simple proton transfer conditions, giving vinylogous Michael products in 83-99% yield, 16:1-> 30:1 dr, and 96-99% ee.