2,6-Dimethylaniline → 2-(4-Amino-3,5-dimethylphenyl)-1,1,1,3,3,3-hexafluoropropan-2-ol

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Hexafluoroacetone trihydrate (9.68 g, 44 mmol) was added to 2,6-dimethylaniline (4.84 g, 40 mmol) and p-toluenesulfonic acid (304 mg, 1.6 mmol) at room temperature. The mixture was stirred at 130° C. for 14 hours under a nitrogen atmosphere. After cooling down, the solidified mixture was washed with sodium bicarbonate solution, water, and hexane and dried to afford 10 g of 4-[2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl]-2,6-dimethylaniline. 1H NMR (DMSO): δ 8.11 (s, 1H), 7.08 (s, 2H), 4.89 (s, 2H), 2.10 (s, 6H). MS (ES) m/z 288.1 ([M+H]+).

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