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Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Report | Regular issue | Vol 19, No. 9, 1982, pp.1619-1622
Published online, 1st January, 1970■ Oxidation of 3-Methoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline with m-Chloroperbenzoic Acid
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.
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