Synthesis Of New Amino-1,5-Benzodiazepine And Benzotriazole Derivatives From Dimedone

High-yielding syntheses of two unpublished series of amino-1,5-benzodiazepines derivatives 3 and 1,2,3-benzotriazoles 4 bearing a dimedone moiety are respectively reported. Derivatives 3 were obtained by intramolecular cyclisation using cyanogenbromide of enaminone 2. On the other hand, when enaminones 2 were treated with sodium nitrite under acidic conditions, cyclisation led to benzotriazole 4.