Asymmetric Hydrogenation of 2-Aryl-5,6-dihydropyrazine Derivatives with Chiral Cationic Ruthenium Diamine Catalysts
作者:Yong Li、Yanmei He、Fei Chen、Qinghua Fan
DOI:10.1002/cjoc.201400422
日期:2014.10
The first asymmetrichydrogenation of unfunctionalized 2‐substituted and 2,3‐disubstituted 5,6‐dihydropyrazines catalyzed by chiralcationic Ru‐diamine complex (R,R)‐1a was developed, affording chiral piperazine derivatives with good enantioselectivities (up to 89% ee).