Abstract 4-Chlorotetrazolo [1, 5-a] quinoxaline (III) was synthesized by azide (2+ 3) cycloaddition of 2, 3-dichloroquinoxaline (II). Compound (III) on further refluxing with hydrazine hydrate furnished 4-hydrazinotetrazolo [1, 5-a] quinoxaline (IV). Further refluxing of (IV) with different aromatic aldehydes in methanol yielded corresponding Schiff's bases V (aj). Various 4-aminotetrazolo [1, 5-a] quinoxaline based azetidinones VII (aj) were ...