Asymmetric Hydrogenation of Cyclic Imines of Benzoazepines and Benzodiazepines with Chiral, Cationic Ruthenium-Diamine Catalysts
作者:Zhusheng Yang、Ziyuan Ding、Fei Chen、Yan-Mei He、Nianfa Yang、Qing-Hua Fan
DOI:10.1002/ejoc.201700236
日期:2017.4.10
The title hydrogenation reaction is achieved in the presence of phosphine‐free, chiral, cationic ruthenium–diamine complexes and provides facile access to various chiral seven‐membered N‐containing heterocycles. A reversal of enantioselectivity is observed simply by changing the achiral counteranion of the catalyst.
标题氢化反应是在无膦,手性,阳离子钌-二胺配合物存在下完成的,可轻松接近各种手性七元含氮杂环。简单地通过改变催化剂的非手性抗衡阴离子就可以观察到对映选择性的逆转。