A General, Regiospecific Synthetic Route to Perfluoroalkylated Arenes via Arenediazonium Salts with RFCu(CH3CN) Complexes

A mild method of converting arylamines into perfluoroalkylated arenes is described. Relatively stable RFCu(CH3CN) complexes are used as perfluoroalkylating agents, which react smoothly with arenediazonium salts to produce various perfluoroalkylarenes in good yields. Based on the results of clock trapping experiments with diallyl ether, a radical process might be involved in the reaction.