Sulfonato-imino copper(ii) complexes: fast and general Chan–Evans–Lam coupling of amines and anilines

Abstract

Sulfonato-imine copper complexes with either chloride or triflate counteranions were prepared in a one-step reaction followed by anion-exchange. They are highly active in Chan–Evans–Lam couplings under mild conditions with a variety of amines or anilines, in particular with sterically hindered substrates. No optimization of reaction conditions other than time and/or temperature is required.