Direct C(sp 3 )-H Arylation of Unprotected Benzyl Anilines and Alkylarenes by Organocatalysis under Visible Light.

Reported herein is direct C(sp 3 )-H arylation of unprotected benzyl anilines and alkylarenes via consecutive photoinduced electron transfer by visible light irradiation. Reductive quenching cycles and radical-radical cross-coupling were involved, and electron paramagnetic resonance experiments provide evidence for the formation of radical intermediates formed in situ . The protocol highlights transition metal free, external oxidant free, broad substrate scope, and high efficiency (>60 examples, up to 96%).