Copper-Catalyzed Trifluoromethylation of (Hetero)aryl Boronic Acid Pinacol Esters with YlideFluor

A copper-catalyzed trifluoromethylation of (hetero)arylboronic acid pinacol esters with YlideFluor for the preparation of trifluoromethylated (hetero)arenes was described. The reaction conditions are mild and compatible with a broad range of functional groups. Heteroaryl boronic acid pinacol esters could also be trifluoromethylated in high yields. Application of this protocol for trifluoromethylation of drug and OLED molecules was demonstrated.