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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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Paper | Regular issue | Vol 36, No. 1, 1993, pp.55-62
Published online, 1st January, 1970■ Nucleophilicity of 3-Alkyl-2-(N-cyanoimino)thiazolidines: Methylated Products and Their Reactivity
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6104
■ Nucleophilicity of 3-Alkyl-2-(N-cyanoimino)thiazolidines: Methylated Products and Their Reactivity
Chuzo Iwata,* Tetsuya Kawakami, Michitaro Fujimoto, Yumi Nakamoto, and Tetsuaki Tanaka
*Faculty of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Toyonaka, Osaka 560-0043, Japan
Abstract
3-Alkyl-2-(N-cyanoimino)thiazolidines were methylated mainly at the nitrile nitrogen atom with trimethyloxonium tetrafluoroborate (Me3O·BF4). The reaction of the methylated products, the nitrilium salts, with sodio diethyl malonate was described.
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