A divergent synthetic platform for the efficient installation of valuable fluorinated sulfoximine moieties onto olefins and bicycloalkanes has been developed . Mechanistic investigations, and notably spin trapping/EPR experiments performed at the ICR, revealed the key activity of a fluorinated radical that undergoes ATRA or hydrofunctionalization pathways.
Herein, we report a metal-free divergent visible-light driven method for the synthesis of fluorinated sulfoximines. Both olefins and propellanes efficiently undergo difluorosulfoximination with yields up to 77% (65 examples). The process is general and robust and tolerates diverse functional groups, including esters, ethers, ketones, silyl groups, silyl ethers or boronic esters. The functionalization of diverse bioactive ingredients (8 examples) and various product manipulations demonstrate the synthetic usefulness of the developed synthetic platform. Finally, we rationalized the divergent reaction mechanism by performing Stern–Volmer quenching and EPR experiments that revealed the key activity of a difluoroalkyl sulfoximine radical.