Bifunctional 3,3′-Ph<sub>2</sub>-BINOL-Mg Catalyzed Direct Asymmetric Vinylogous Michael Addition of α,β-Unsaturated γ-Butyrolactam
作者:Li Lin、Jinlong Zhang、Xiaojuan Ma、Xu Fu、Rui Wang
DOI:10.1021/ol202713f
日期:2011.12.16
Bifunctional 3,3′-Ph2-BINOL-Mg catalyzed direct asymmetric vinylogousMichaeladdition of α,β-unsaturatedγ-butyrolactam has been developed. The catalytic activity of this protocol was slightly affected by different types of Michael acceptors, such as a variety of enones as well as α,β-unsaturated N-acylpyrroles. The Michael products were obtained with high diastereoselectivities (up to 20:1) and excellent