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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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Short Paper | Regular issue | Vol 96, No. 5, 2018, pp.943-953
Published online, 24th April, 2018
Published online, 24th April, 2018
DOI: 10.3987/COM-18-13900
■ Acid Promoted Metal Free Synthesis of Triazole-Fused Heterocycles via Intramolecular [3+2] Cycloaddition
Youlai Zhang, Mengdi Wang, Junru Li, Qingtong Di, Ziye Tian, Baoquan Chen, Huan Zhang,* Hiroki Tanimoto, Tsumoru Morimoto, and Kiyomi Kakiuchi
*Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
Abstract
A practical and efficient protocol for the synthesis of triazole-fused heterocycles through intramolecular metal free [3+2] azide-alkyne cycloaddition reaction is described. Range of acids was selected to demonstrate the reaction conditions. Organic azides and propargyl cations generated by acids gave fused triazoles including multivariate rings and heterocycles. Various fused triazoles and bistriazoles were obtained in good yields under mild reaction conditions.
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