Photoredox-Catalyzed α-C(sp3)-H Activation of Unprotected Secondary Amines: Facile Access to 1,4-Dicarbonyl Compounds.

A photoredox-catalyzed α-C(sp3)-H activation approach of unprotected secondary amines is reported. Such transformations provide facile access to various 1,4-dicarbonyl compounds using readily available amines and α,β-unsaturated compounds as feedstocks under air conditions. The substrate scope of this method is broad, and a wide array of functional groups are tolerated.