Fig. 1: Development of heteroatom insertion reactions by a ligand-to-metal charge-transfer strategy.
From: Oxygen migration into carbon–carbon single bonds by photochemical oxidation

a, C–H and C–C functionalizations for peripheral and skeletal modification. b, Representative example of heteroatom insertion for sp2-(hetero)arenes. c, Design of the oxygen insertion. d, General scheme for cyclic and acyclic oxygen insertion. TBS, tert-butyldimethylsilyl; LMCT, ligand-to-metal charge transfer; Nuc, nucleophile.