External-Oxidant-Free Electrochemical Oxidative Trifluoromethylation of Arenes Using CF3SO2Na as the CF3 Source

An efficient and environmentally benign electrochemical oxidative radical C-H trifluoromethylation of arenes by employing Langlois reagent as the CF3 source was developed in this work. Neither transition metal catalysts nor external chemical oxidants were required in this trifluoromethylation process. The reaction could be conducted in gram scale with high reaction efficiency.