The synthesis of regio- and stereoselective arylsubstitutedα,β-unsaturated aldehydes and ketones from activated allenes was achieved. This mild and non-metallic oxidation is exclusively driven by benign ambient air and triggered by visible light. The same starting materials under ideal anaerobic conditions led to the 2,3-diphenylselenation adduct with no trace of oxygenated products, demonstrating
Free-radical addition of diphenyldiselenide 2 to allenes 1 took place under irradiation through Pyrex with tungusten lamp to provide 1-(phenylselenomethyl)vinyl selenides 3 in excellent yields.