Pyranoazepine, a new heterocyclic system. A new approach to pyridoazepines

Article abstract of DOI:10.3987/COM-89-S8

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.