1,4-Diphenyl-5<i>H</i>-[1,2,5]triazepino[5,4-<i>a</i>]benzimidazol as a New Heterocyclic System. Synthesis and Properties
A method for the synthesis of a 1,4-diphenyl-5 H -[1,2,5]triazepino[5,4- a ]benzimidazole new heterocyclic system is proposed. This method is based on the reaction of ethyl (2-benzoyl-1 H -benzimidazol-1-yl)acetate with hydrazine hydrate and subsequent thermal heterocyclization of the resulting product.