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■ Oxidation of 2-Amino-2’-hydroxybenzophenone N-Acylhydrazones: Synthesis of 6-Substituted Dibenzazepin-11-ones

Antigoni Kotali,* Efthymia Lazaridou, Vassilios P. Papageorgiou, and Philip A. Harris

*GlaxoSmithKline,Five Moore Drive, P.O. Box 13398, Research Triangle Park, North Carolina, 27709-3398, U.S.A.

Abstract

The synthesis of 6-substituted 11H-dibenz[b,e]azepin-11-ones is reported via the lead tetraacetate oxidative cyclization of 2-amino-2-hydroxybenzophenone N-acylhydrazones. A mechanism involving formation of a 2-acyl-2’-aminobenzophenone intermediate is proposedA