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Report | Regular issue | Vol 19, No. 9, 1982, pp.1619-1622
Published online, 1st January, 1970
DOI: 10.3987/R-1982-09-1619
Oxidation of 3-Methoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline with m-Chloroperbenzoic Acid

Yoshihisa Kurasawa, Yujiro Moritaki, and Atsushi Takada

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

Abstract

The reaction of 3-methoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline (Ia) with m-chloroperbenzoic acid gave 3-(1-hydroxy-1-methoxycarbonyl)methylene-2-oxo-1,2,3,4-tetrahydroquinoxaline and 2,3-dioxo-1,2,3,4-tetrahydroquinoxaline. The equilibrium between the tetrahydro form (Ia type) and the dihydro form (Ib type) was exhibited, together with the 1H-NMR data.