2-Fluoro-5-nitrobenzotrifluoride → 1-(Methylsulphonyl)-4-nitro-2-(trifluoromethyl)benzene

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A mixture of 2-fluoro-5-nitrobenzotrifluoride (2.09 g, 10 mmol) and sodium methanesulfinate (1.32 g, 11 mmol) in DMSO (20 mL) was heated at 130° C. for 17.5 hours. After cooling down to room temperature, the mixture was poured into ice-water. The whole was extracted with ethyl acetate (30 mL×2), the combined organic layer washed with water, brine, dried over MgSO4, and concentrated in vacuo. The residue was crystallized from hexane to give the subtitle compound (1.56 g, 57.8%, yield).

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