Oxidation of the non-phenolic aporphines nuciferine (1), dicentrine (3), ocopodine (4) and thalicarpine (7) by iodine affords the corresponding dehydroaporphines (2, 5, 6 and 8). In contrast. iodine oxidation of non-phenolic noraporphines proceeds all the way to the oxoaporphine stage: thus. O-methylnandigerine (9), nordicentrine (11) and ovigerine (12) yield the corresponding oxoaporphines (10, 13 and 14). The phenolic aporphine N- ...