[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([N+:8]([O-:10])=[O:9])[C:3]=1[OH:11].C(=O)([O-])[O-].[K+].[K+].[F:18][C:19]([F:25])([F:24])[S:20](Cl)(=[O:22])=[O:21]>CC(C)=O>[F:18][C:19]([F:25])([F:24])[S:20]([O:11][C:3]1[C:4]([N+:8]([O-:10])=[O:9])=[CH:5][CH:6]=[CH:7][C:2]=1[F:1])(=[O:22])=[O:21]A mixture consisting of 2-fluoro-6-nitrophenol (20 g, 0.14 mol) and potassium carbonate (20 g, 0.14 mol) in acetone (350 mL) was stirred at room temperature for 20 minutes. A solution of trifluoromethanesulfonyl chloride (23.7 g, 0.14 mol) in acetone (100 mL) was added dropwise at room temperature. Stirring was continued for 3 hours. The reaction was filtered, and the filtrate was concentrated. The residue was dissolved in diethyl ether (300 mL), washed with 0.1N NaOH, water, dried (MgSO4), filtered and evaporated to give 21.5 g of the title compound.
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