THE REACTIVITY OF DIAZO KETONES. III. THE THERMAL OR PHOTOCHEMICAL REACTION OF AZIBENZIL WITH MOLECULAR OXYGEN
Thermal or photochemical reaction of azibenzil (I) with molecular oxygen in benzene gave tetraphenylglycolide (II), instead of benzil or a cyclic peroxide, together with bis-benzilketazine (III) and diphenylketene (IV). The formation of II did not occur from III or IV, suggesting that phenyl benzoyl carbene reacted with molecular oxygen followed by phenyl migration.