with either propanoic or butanoic acid side chains led to the formation of the cyclic ketones (3c) and (4d) from which the petroporphyrins (3b) and (4c) were obtained; treatment of (4c) under acidic conditions did not result in rearrangement of the seven membered exocyclic ring.
用
丙酸或
丁酸侧链取代的
卟啉的分子内环化导致形成环酮(3c)和(4d),由此获得了
卟啉(3b)和(4c)。在酸性条件下处理(4c)不会导致七元环外环的重排。