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Communication | Regular issue | Vol 20, No. 10, 1983, pp.1917-1921
Published online, 1st January, 1970
DOI: 10.3987/R-1983-10-1917
Tautomeric Behaviors of 3-(1,3,4-Oxadiazol-2-yl)methylene-2-oxo-1,2,3,4-tetrahydroquinoxalines

Yoshihisa Kurasawa and Atsushi Takada

*School of Pharmaceutical Sciences, Kitasato University, Shirokane, Minato-ku, Tokyo 108-8641, Japan

Abstract

3-(1,3,4-Oxadiazol-2-yl)methylene-2-oxo-1,2,3,4-tetrahydroquinoxalines (2a,b) were found to exhibit the two tautomers in dimethylsulfoxide and three tautomers in trifluoroacetic acid, and their tautomeric species were assumed based on the NMR and UV spectral data.