Collect. Czech. Chem. Commun. 1981, 46, 2110-2115

Ketimine-enamine tautomers of tetrazolo[1,5-a]quinoxaline derivatives

Jiří Klicnar and Jaromír Toman

Department of Organic Chemistry, Institute of Chemical Technology, 523 10 Pardubice


4-Ethoxycarbonylmethylene-4,5-dihydrotetrazolo[1,5-a]quinoxaline and its α-substituted derivative display ketimine-enamine tautomeric isomerism. Their IR spectra and hydrazinolysis of 3,4-dihydro-3-oxo-quinoxaline analogues and related substances were studied.