Studies on the Syntheses of Heterocyclic Compounds. DXXIX. Dehydrogenation of Cularine Type Compound

Abstract

Treatment of 1-benzyloxy-2, 11-dimethoxy-5, 5a, 6, 7, 8-pentahydrobenzo [b] oxepino-[7, 6, 5-ij] isoquinoline (XVI) or its derivative (XV) with some oxidative reagents resulted in the formation of only 1-benzyloxy-2, 11-dimethoxy-5-oxobenzo [b] oxepino [7, 6, 5-ij] isoquinoline (XX) or its derivative (XXI).