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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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Report | Regular issue | Vol 23, No. 5, 1985, pp.1161-1166
Published online, 1st January, 1970■ Reactions with Maleimides: Synthesis of Several New Fused Pyrazolidines, Δ2-Pyrazoline and Pyrazole Derivatives
Published online, 1st January, 1970
DOI: 10.3987/R-1985-05-1161
■ Reactions with Maleimides: Synthesis of Several New Fused Pyrazolidines, Δ2-Pyrazoline and Pyrazole Derivatives
Sami S. Ghabrial,* Hussein H. Moharram, and Suzan I. Aziz
*National Organization for Drug Control and Research, P.O. Box 29, Cairo, Egypt
Abstract
Several new pyrrolidinopyrazolidinedione, pyrrolidino-Δ2-pyrazolinedione and pyrrolopyrazoledione derivatives were synthesised via the reaction of different arylhydrazones with N-arylmaleimides. The structures of the synthesized heterocyclic derivatives were established on the basis of elemental analyses and spectroscopic data studies.
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