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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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Paper | Regular issue | Vol 78, No. 11, 2009, pp.2755-2768
Published online, 3rd August, 2009
Published online, 3rd August, 2009
DOI: 10.3987/COM-09-11768
■ The Synthesis, Structure and Reactivity of 1-Thioxotetrahydropyridazino[1,2-a][1,2,4]triazin-4(1H)-one
Sandra Jarrett,* Ainka Brown, and Marvadeen Singh-Wilmot
*Department of Chemistry, Mona Campus, University of the West Indies, Mona, Kingston 7, Jamaica
Abstract
The synthesis of 1-thioxotetrahydropyridazino[1,2-a][1,2,4]triazin-4-(1H)-one 3 in five steps from tert-butyl carbazate and its transformation into 3-benzylidene and 1-amino derivatives are described. Its crystal structure is presented showing it to be an axially chiral molecule that exists as a racemate in the solid state.
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