Research on imidazo[1,2-a]benzimidazole derivatives

The action of excess nitrous acid on 9-methyl-2-phenylimidazo[1,2-a]benzimidazole results in opening of the outer imidazole ring and the formation of unstable 1-methyl-2-nitrosimino-3-oximinophenacylbenzimidazoline. The products of cleavage of this compound in alkali, acid, and alcohol solutions were studied.See [1] for Communication 18.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 68–70, January, 1980.