HETEROCYCLES

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■ Pyrano[3,2-c]azepine, a New Heterocyclic System. A New Approach to Pyrido[3,2-c]azepines

Marijan Kocevar,* Slovenko Polanc, Miha Tisler, and Bojan Vercek

*Department of Chemistry and Chemical Technology, E. Kardelj University, Murnikova 6, 61000 Ljubljana, Slovenia

Abstract

3-Benzoylamino-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydrocoumarin (1a) was used as a synthon in the preparation of the first derivatives of the pyrano[3,2-c]azepine system 2 and in two approaches to pyrido[3,2-c]azepines 4.