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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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Communication | Regular issue | Vol 94, No. 12, 2017, pp.2215-2221
Published online, 17th October, 2017
Published online, 17th October, 2017
DOI: 10.3987/COM-17-13816
■ Synthesis of 2-Aminopyridinium Salts from 2-Iminopyridines as a Starting Material
Iwao Hachiya, Makoto Fukutomi, Naoki Kugisaki, Satoshi Shimada, and Makoto Shimizu*
*Department of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho Tsu, Mie 514-8507, Japan
Abstract
Synthesis of multi-substituted 2-aminopyridinium salts is developed using 2-iminopyridines as a starting material. The reactions of multi-substituted 2-iminopyridines prepared by the conjugate addition of ethyl 2-cyanopropanoate to alkynyl imines with several acids proceeded smoothly to give multi-substituted 2-aminopyridinium salts in high yields.
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