The highly enantioselective copper-catalyzed propargylic amination of propargylic esters with amine hydrochloride salts has been realized for the first time using copper salts with chiral N,N,P-ligands. This method features a broad substrate scope and wide functional group tolerance, generating propargylic amines in good to excellent yields with high enantioselectivities (up to 99% ee). The utility
Chiral Tridentate P,N,N Ligands for Highly Enantioselective Copper-Catalyzed Propargylic Amination with both Primary and Secondary Amines as Nucleophiles
作者:Cheng Zhang、Ya-Hui Wang、Xin-Hu Hu、Zhuo Zheng、Jie Xu、Xiang-Ping Hu
DOI:10.1002/adsc.201200589
日期:2012.10.8
enantioselective propargylic amination of propargylic acetates with both primary and secondaryamines as nucleophiles, affording the corresponding propargylicamines in high yields and with excellent enantioselectivities (up to 97% ee for secondaryamines, and up to 96% ee for primary amines). Furthermore, the present catalytic system was also effective for the more challenging aliphatic propargylic acetate