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Obituary
Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Paper | Regular issue | Vol 75, No. 2, 2008, pp.331-338
Published online, 9th November, 2007■ First Example of Diels-Alder Reaction of 4-(1-Ethenylsubstituted)-3-methylisoxazoles with Acetylenedicarboxylates
Published online, 9th November, 2007
DOI: 10.3987/COM-07-11210
■ First Example of Diels-Alder Reaction of 4-(1-Ethenylsubstituted)-3-methylisoxazoles with Acetylenedicarboxylates
Stefano Chimichi,* Barbara Cosimelli,* Marco Boccalini, Alessandra Matteucci, and Abdelatif Messaoudi
*Dipartimento di Chimica Organica ”U. Schiff” and Laboratorio di Progettazione, Sintesi e Studio di Eterocicli Biologicamente Attivi (HeteroBioLab), Via della Lastruccia n. 13, I-50019 Sesto F.no, Italy
Abstract
The first example of a [4+2] cycloaddition reaction of 4-(1-ethenylsubstituted)isoxazoles with acetylenedicarboxylates is reported, while the corresponding 5-substituted isomers do not react with the same dienophile; density functional theory (DFT) calculation indicate the electronic origin of the different behaviour.
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