Photocatalytically switchable chemoselective difluoramidation of olefins for the synthesis of diversified difluoro-γ-lactams†

Herein, we describe a visible light-promoted intramolecular difluoramidation reaction of olefins. By precisely adjusting the reaction conditions, the difficult-to-control olefin radical addition process was effectively controlled. Heck-type coupling of olefins and hydrofluoroamidation of olefins, as well as difunctionalization of olefins, were successfully achieved with good selectivity.