Photochemical Skeletal Editing of α,β-Unsaturated Ketones to Furans via Single-Carbon-Atom Insertion.

A novel visible light-catalyzed strategy for single-carbon-atom skeletal editing of acyclic electron-deficient alkenes has been developed. This method offers an efficient approach for the high-value transformation of α,β-unsaturated ketones into multifunctionalized furan skeletons by employing α-iodonium diazo compounds as carbyne precursors under photoredox conditions.