Photosensitizer‐Free, Gold‐Catalyzed C–C Cross‐Coupling of Boronic Acids and Diazonium Salts Enabled by Visible Light

Abstract The first photosensitizer‐free visible light‐driven, gold‐catalyzed C–C cross‐couplings of arylboronic acids and aryldiazonium salts are reported. The reactions can be conducted under very mild conditions, using a catalytic amount of tris(4‐trifluoromethyl)phosphinegold(I) chloride [(4‐CF 3 ‐C 6 H 4 ) 3 PAuCl] with methanol as the solvent allowing an alternative access to a variety of substituted biaryls in moderate to excellent yields with broad functional group tolerance. magnified image