Fluorinations l-fluoro-2,4,6-trimethylpyridinium tetrafluoroborate

The reagent F-Teda BF4 (6) is effective for the fluorination of nitrogen-containing heterocyclic compounds.107 Thus, 1-fluoroquinuclidinium (cf. preparation of compounds 3, vide supra), 1-fluoropyridinium (cf. Section 9.4.) and l-fluoro-2,4,6-trimethylpyridinium tetrafluoroborate have been prepared in excellent yield by fluorination of quinuclidine, pyridine and 2,4,6-trimethylpyridine with F-Teda BF4 (6).107... 

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