CONDENSED IMIDAZO-1,2,4-AZINES. 31. SYNTHESIS AND CHEMICAL TRANSFORMATIONS OF SUBSTITUTED 1,2,4-TRIAZEPINO[2,3-<i>a</i>]BENZIMIDAZOLES

Abstract

By reaction of 1,2-diaminobenzimidazole with 1,3-diketones, acetoacetic ester and its derivatives, we have synthesized substituted 1,2,4-triazepino[2,3-a]benzimidazole and 5H-1,2,4-triazepino[2,3-a]-benzimidazol-4-one. By reaction of 5H-2-methyl-1,2,4-triazepino[2,3-a]benzimidazol-4-one with aromatic aldehydes or phenyldiazonium chloride, we have obtained 3-arylidene(phenylazo) derivatives of this compound, and by reaction with P₂S₅ we have obtained 5H-2-methyl-1,2,4-triazepino[2,3-a]-benzimidazole-4-thione. We have shown that when reacted with ammonia, primary or secondary amines, the latter forms 4-amino-substituted 2-methyl-1,2,4-triazepino[2,3-a]benzimidazole.

How to Cite
Kruglenko, V. P.; Gnidets, V. P.; Klyuev, N. A.; Povstyanoi, M. V. Chem. Heterocycl. Compd. 2002, 38, 598. [Khim. Geterotsikl. Soedin. 2002, 683.]

For this article in the English edition, see DOI https://doi.org/10.1023/A:1019573532428