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.