Generality-Oriented Amination of Aryl Halides by Light-Induced Mn(II) Catalysis

In this paper, we report for the first time light-induced Mn(II)-catalyzed C-N coupling reactions of aryl halides with amine nucleophiles under the same reaction conditions (same catalyst, same ligand, same solvent, same base, same temperature) without an exogenous photocatalyst. The current single manganese catalyst system has a dual role of light harvesting and organometallic catalysis, showcasing an excellent substrate range in C-N coupling reactions (5 different nitrogen sources, >90 examples, up to 94% yield). Mechanistic studies indicate that a Mn(I)/Mn(III) catalytic cycle may be involved in the reaction.