Syntheses of Angular Condensed Ring Systems Combining a Benzodiazepinic, or Benzothiazepinic, and a Coumarinic Moiety

Article abstract of DOI:10.1007/BF00815168

The title compounds were prepared via intermediates resulting from reactions of 3-formyl-4-hydroxycoumarin (1) with o-phenylenediamine, o-aminophenol and o-aminothiophenol, respectively.Intramolecular ring closures were effected between the free hydroxy and amino or thiol groups.