T. Shamma et al., Electrophilic fluorination of aromatics with Selectfluor (TM) and trifluoromethanesulfonic acid, ISR J CHEM, 39(2), 1999, pp. 207-210
1-(chloromethyl)-4-fluoro-1,4-diazabicyclo[2.2.2]octane bis (tetrafluorobor
ate) [Selectfluor(TM) F-TEDA-BF4 (TEDA = triethylenediamine)] in the presen
ce of trifluoromethanesulfonic acid has been found to be a very effective r
eagent system for the direct electrophilic fluorination of a wide variety o
f aromatic compounds under mild reaction conditions to the corresponding fl
uoroaromatics in good to excellent yields.