Considerable attention has been paid to the development of efficient methods for the introduction of a trifluoromethyl (CF3) group into diverse molecular skeletons [1] because a wide range of organic molecules bearing trifluoromethyl groups has been applied in the field of pharmaceuticals and materials.[2] In fact, the introduction of a trifluoromethyl group into aromatic rings (the formation of Csp2ÀCF3 bonds) through, for example, ...