Advances in N-centered intermediates by energy transfer photocatalysis

Advances in visible-light-mediated energy transfer (EnT) catalysis have created a unique strategy for small-molecule activation and new chemical bond formation in organic synthesis. In particular, open-shell nitrogen reactive intermediates have emerged as versatile synthons for various cross-coupling reactions and the construction of N-heterocycles. Visible-light-induced EnT catalysis produced N-radicals and nitrenes based on their parent chemical structure disconnections. In this review, we highlight the key contributions in the field with an emphasis on the studies that have generated and utilized N-centered intermediates, and provide mechanistic insights on these photocatalytic processes.