Dj. Adams et al., TETRAMETHYLAMMONIUM HYDROGENDIFLUORIDE - A CONVENIENT SOURCE OF NUCLEOPHILIC FLUORIDE, Synthetic communications, 28(23), 1998, pp. 4295-4301
Tetramethylammonium hydrogendifluoride (TMAHF(2)) acts as an effective
fluoride source for the selective fluorination in high yields of vari
ous chloro and nitroaromatics via halogen exchange (halex) and fluorod
enitration.