HETEROCYCLES
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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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Note | Regular issue | Vol 51, No. 9, 1999, pp.2171-2181
Published online, 1st January, 1970■ Triazolo[4,5-f]quinolines Derived from 5-Amino-(1H- and 2-methyl-2H)-benzotriazoles with β-Diketones and 3-Buten-2-one
Published online, 1st January, 1970
DOI: 10.3987/COM-99-8592
■ Triazolo[4,5-f]quinolines Derived from 5-Amino-(1H- and 2-methyl-2H)-benzotriazoles with β-Diketones and 3-Buten-2-one
Paolo Sanna,* Antonio Carta, and Giuseppe Paglietti
*Dipartimento Farmaco Chimico Tossicologico, Universita di Sassari, Via Muroni 23/a, 07100 Sassari, Italy
Abstract
5-Aminobenzotriazole and its derivatives are good substrates for reactions with β-diketones and 3-buten-2-one to produce angular triazolo[4,5-f]quinolines. Interesting isomeric compounds were found in the case of reaction with non-symmetrical diketones, whereas an unusual cyclization takes place when 2-acetylcyclopentanone was used.
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