Abstract
A 7H-benzimidazolo[1,2-d][1,4]benzodiazepin-6(5H)-one was isolated in high yield from a condensation reaction of 2-(o-aminophenyl)benzimidazole with bromoacetyl bromide. The reactivity of 7H-benzimidazolo[1,2-d][1,4]benzodiazepin-6(5H)-one have been studied.