Metal- and oxidant-free carbonylation of benzylic and allylic C–H bonds with H2O via dual oxidative radical-polar crossover

A visible-light photocatalytic carbonylation of both benzylic and allylic C–H bonds with H 2 O in a metal-, oxidant-, and additive-free manner via a dual oxidative radical-polar crossover (ORPC) process has been developed.