A Simple Access to Symmetric Diarylamines via Copper(II)-catalyzed Coupling of Aqueous Ammonia with Arylboronic Acids

Abstract
A simple and efficient CuII-catalyzed coupling reaction of arylboronic acids with aqueous ammonia under air is described. The reaction was conducted under atmospheric pressure and no additional ligand was required. Benzoic acid was added to tune the basicity of the reaction system.