Asymmetric copper-catalyzed propargylic amination with amine hydrochloride salts

Chem Commun (Camb). 2021 May 11;57(38):4674-4677. doi: 10.1039/d1cc00663k.

Abstract

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 of the approach was demonstrated by late-stage functionalization of marketed pharmaceuticals.