On the synthesis of protopine alkaloids

…, N Kurono, M Tokuda, T Ohkuma, K Orito

Index: Orito, Kazuhiko; Kudoh, Shigekazu; Yamada, Kinji; Itoh, Mitsuomi Heterocycles, 1980 , vol. 14, # 1 p. 11 - 14

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Citation Number: 15

Abstract

For the synthesis of protopine alkaloids, we studied a reaction sequence based on a ring enlargement of indeno [2, 1-a][3] benzazepines by a singlet oxygen oxygenation, followed by conversion of an amide carbonyl group of the resultant 10-membered keto-lactam to a