Asymmetric Hydrogenation of Cyclic N-Sulfonylimines with Phosphine-Free Chiral Cationic Ru-MsDPEN Catalysts
作者:Fei Chen、Zhiwei Li、Yanmei He、Qinghua Fan
DOI:10.1002/cjoc.201090260
日期:2010.9
Phosphine‐free chiralcationic Ru/diamine complexes are effective catalysts for the asymmetrichydrogenation of a range of cyclic N‐sulfonylimines, affording chiral sultam derivatives with good to excellent enantioselectivity (up to 94% ee).