Branched-Selective Hydroacylation of Alkenes via Photoredox Cobalt and N-Heterocyclic Carbene Cooperative Triple Catalysis

A Markovnikov-selective hydroacylation of alkenes has been achieved via the synergistic merger cobalt, photoredox and N-heterocyclic carbene catalysis. The closely incorporated catalytic cycles allow for Co(III) generation by photochemical oxidation instead of chemical oxidants or anodizing process. This mild, operationally simple protocol converts a wide variety of commercially available alkenes and aroyl fluorides into the corresponding ketones in high yield with branched selectivity.