Fig. 1: Photo-catalyzed N to C aryl migration reactions.

a Aryl migration from N to C via photocatalytic homolytic C–N bond cleavage. b Aryl migration from N to C via photocatalytic radical-polar crossover. c This work: CO2-Promoted photocatalytic radical aryl migration from N to C: switchable synthesis of tetra- and tri-substituted alkenyl amides. FG functional group, RPC radical-polar crossover, HAT hydrogen atom transfer.