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Communication | Regular issue | Vol 94, No. 12, 2017, pp.2215-2221
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


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.