Heteropolyacids as Green and Reusable Catalysts for the Synthesis of 3,1,5-Benzoxadiazepines

Abstract

Synthesis of 3,1,5-benzoxadiazepines from the condensation of o-phenylenediamine (o-PDA) and acyl chlorides in the presence of a catalytic amount of various heteropolyacids (HPAs) is reported.

Keywords

• 3
• 1
• 5-Benzoxadiazepines
• recyclable catalysts
• heteropolyacids
• heterocycle