Ueno, Tetsuya published the artcilesynthesis of 1-fluoro- and 1,3-difluoroazulenes, Recommanded Product: 1-Fluoropyridiniumtriflate, the publication is Chemistry Letters (1995), 169-70, database is CAplus.
Title compounds were synthesized by the reaction of azulene with N-fluoropyridinium salts in MeCN. Me azulene-1-carboxylates were also fluorinated to give the corresponding 3-fluoro derivatives On the basis of the UV-visible absorption spectra, the fluorine atom acts as an electron-donating group to the azulene π-system due to the +Iπ effect. A solution of azulene and N-fluoro-2,4,6-trimethylpyridinium triflate in MeCN were refluxed to give 1-fluoroazulene and 1,3-difluoroazulene. The yields of these 2 compounds decreased with more powerful fluorinating agents.
Chemistry Letters published new progress about 107263-95-6. 107263-95-6 belongs to pyridine-derivatives, auxiliary class Fluorination reagent, name is 1-Fluoropyridiniumtriflate, and the molecular formula is C19H17N2NaO4S, Recommanded Product: 1-Fluoropyridiniumtriflate.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem