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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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Communication | Regular issue | Vol 34, No. 8, 1992, pp.1507-1510
Published online, 1st January, 1970■ Nucleophilic Fluorination of Chlorinated N-Heterocycles with Tetrabutylphosphonium Hydrogendifluoride and Dihydrogentrifluoride
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6091
■ Nucleophilic Fluorination of Chlorinated N-Heterocycles with Tetrabutylphosphonium Hydrogendifluoride and Dihydrogentrifluoride
Yukitaka Uchibori, Masayuki Umeno, and Hirosuke Yoshioka*
*RIKEN(Institute of Physical and Chemical Research), Wako, Saitama 351-01, Japan
Abstract
Fluorination of various chlorinated N-heterocycles with tetrabutylphosphonium hydrogendifluoride (1) or dihydrogentrifluoride (2) readily proceeded in high yields under mild conditions.
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