Potassium Fluoride → N-(2-bromo-4-(perfluoropropan-2-yl)-6-(trifluoromethyl)phenyl)-2-fluoro-3-nitrobenzamide

To a solution of N-(2-bromo-4-(heptafluoropropan-2-yl)-6-(trifluoromethyl)phenyl)-2-chloro-3-nitrobenzamide 4.89 g (8.27 mmol) in 50 ml of anhydrous DMF was added 2.40 g (41.3 mmol) of potassium fluoride (spray-dried product) under a flow of nitrogen, followed by stirring at 130° C. for 10 hours. Liquid separation was carried out by adding ethyl acetate, hexane, and water to the reaction mixture, and then the organic layer was washed with water and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the obtained residue was purified by silica gel column chromatography (eluent solvent; hexane:ethyl acetate=10:1) to prepare 0.940 g (yield 20%) of a target compound.