Efficient three-step synthesis of benzo[e]imidazo[1,2-c][1,2,3]triazines

ABSTRACT

A novel three-step sequence toward benzo[e]imidazo[1,2-c][1,2,3]triazine derivatives is investigated. This pathway started from commercially available starting materials afforded 5a–h in good to excellent yields. In this method, we took the advantage of diazonium chemistry, which was followed by intramolecular N-N bond formation in the construction of N-rich cycles.

GRAPHICAL ABSTRACT

KEYWORDS:

• Benzotriazine
• diazonim salt
• heterocyclization
• imidazole
• N-N bond