Reaction of chloro-substituted N-cyano-benzimidazoles with hydrazines. A route to 1H-[1,2,4]triazolo[4,3-a]benzimidazole and [1,2,4]triazino[4,5-a]benzimidazole
Reaction of chloro-substituted N-cyano-benzimidazoles with hydrazines. A route to 1H-[1,2,4]triazolo[4,3-a]benzimidazole and [1,2,4]triazino[4,5-a]benzimidazole