Organocatalytic Direct Asymmetric Vinylogous Michael Reaction of an α,β-Unsaturated γ-Butyrolactam with Enones
作者:Yong Zhang、Yong-Liang Shao、Hai-Sen Xu、Wei Wang
DOI:10.1021/jo102223v
日期:2011.3.4
An organocatalytic asymmetric direct vinylogous Michael addition of α,β-unsaturated γ-butyrolactam to enones has been achieved with a simple bifunctional thiourea-tertiary amine catalyst, affording the γ-substituted butyrolactam products with high diastereo- and enantioselectivity (up to >40:1 dr and 94−99% ee).
用简单的双官能硫脲-叔胺催化剂实现了将α,β-不饱和γ-丁内酰胺的有机催化不对称乙烯基乙烯基迈克尔直接加成,为γ-取代的丁内酰胺产物提供了高非对映和对映选择性(最高> 40: 1 dr和94−99%ee)。