Direct allylic C(sp 3 )–H acylation of alkenes via metallaphotoredox catalysis using carboxylic acids

A nickel/photoredox dual catalytic system that enables direct allylic C(sp 3 )–H acylation of unactivated alkenes with free carboxylic acids has been developed, providing a more straightforward and versatile approach to β,γ-unsaturated ketones.