HETEROCYCLES

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■ 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.