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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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Paper | Regular issue | Vol 32, No. 1, 1991, pp.99-105
Published online, 1st January, 1970■ A Facile Synthesis of Substituted 4-Hydroxy-2-pyridones
Published online, 1st January, 1970
DOI: 10.3987/COM-90-5631
■ A Facile Synthesis of Substituted 4-Hydroxy-2-pyridones
Kun Hoe Chung, Kwang Yun Cho, Yasuko Asami, Nobutaka Takahashi,* and Shigeo Yoshida
*Department of Agricultural Chemistry, Faculty of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
Abstract
Substituted 4-hydroxy-2-pyridones (1a-1d) were easily synthesized from ethyl acetoacetate in good yields via C-alkylation, enamine formation, N-acylation, intramolecular cyclization, and debenzylation.
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