1-(1,2,3-triazol-4-yl)-benzimidazolones, a new series of heterocyclic derivatives

New 1-(1,2,3-triazol-4-yl)-benzimidazolone derivatives were obtained on pur suing research about new tricyclic derivatives of medicinal interest, beari ng a 1,2,3-triazole ring fused with another heterocyclic ring. 1-[(5-Carbox amido)-1,2,3-triazol-4-yl] was prepared by four different chemical routes a nd it was unequivocally confirmed by spectroscopic methods. Its chemical be haviour, was evaluated by some common chemical reactions such as hydrolysis , esterification, decarboxylation, nitration and N-methylation.