Trifluoromethylative\nand Pentafluoroethylative Heterofunctionalization\n(C–O, C–S, and C–N) of Alkenes Using Visible\nLight Photocatalysis

A mild and general method for photoredox-catalyzed trifluoromethylative\nand pentafluoroethylative heterofunctionalization of alkenes is proposed.\nIn this reaction, the Togni reagent serves as a CF<sub>3</sub>- or\nCF<sub>2</sub>CF<sub>3</sub>-radical source for the regioselective\nformation of the C–CF<sub>3</sub> and C–CF<sub>2</sub>CF<sub>3</sub> bonds from alkenes, and additional nucleophiles (O,\nS, N) provide C–O, C–S, and C–N bonds, respectively.\nThese reactions provide a common gateway to access the fluoroalkylative\nheterofunctionalization of alkenes.