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Obituary
Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Report | Regular issue | Vol 14, No. 3, 1980, pp.333-336
Published online, 1st January, 1970■ A New Method for Synthesis of Lactam
Published online, 1st January, 1970
DOI: 10.3987/R-1980-03-0333
■ A New Method for Synthesis of Lactam
Yoshihisa Kurasawa and Atsushi Takada
*School of Pharmaceutical Sciences, Kitasato University, Shirokane, Minato-ku, Tokyo 108-8641, Japan
Abstract
2-Substituted 3-oxo-3,4-dihydroquinoxalines were oxidized with H2O2 to 2,3-dioxo-1,2,3,4-tetrahydroquinoxaline. This oxidation of the imino bonding in the heterocycles to the lactam was assumed to proceed via the various peroxides, but not via the oxaziranes.
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