Halogen bonding-induced 1,3-carbohydroxylation of allyl carboxylates via 1,2-cationic acyloxy migration (1,2-CAM)

Halogen-bond-assisted visible-light activation of alkyl iodide C–I bonds by H 2 O initiates a radical–cationic cascade that converts allyl carboxylates into β-acyloxy alcohols via 1,2-cationic acyloxy migration, enabling formal 1,3-carbohydroxylation.