Visible‐Light‐Mediated Aromatic Substitution Reactions of Cyanoarenes with 4‐Alkyl‐1,4‐dihydropyridines through Double Carbon–Carbon Bond Cleavage

Novel aromatic substitution reactions of cyanoarenes with 4‐alkyl‐1,4‐dihydropyridines as alkylating reagents in the presence of a catalytic amount of a photoredox catalyst proceed smoothly to give the corresponding alkyl‐substituted arenes in good to high yields. The present reaction system realizes a novel C−C bond‐forming reaction between two fragments generated from the C−C bond‐cleavage reactions of two independent substrates.