反应详情

To a stirring solution of (2-methyl-6-(trifluoromethyl)pyridin-3-yl)methanol (2.70 g, 14.1 mmol) in acetonitrile (20 mL) at room temperature was added dropwise a solution of 3-chloroperoxybenzoic acid (77% pure, 3.8 g, 16.9 mmol) in acetonitrile. The reaction mixture was stirred at room temperature for 16 h before concentration under reduced pressure. The residue was diluted with EtOAc, and the EtOAc solution was washed with 5% aqueous Na2S2O3, water, then saturated aqueous NaCl, dried over Na2SO4 and concentrated under reduced pressure. The crude product was purified using a silica gel cartridge (40 g) eluted with a gradient of EtOAc (30-100%) in hexanes to afford 730 mg (25%) of the title compound as a white solid. HPLC/MS: retention time=0.92 min, [M+H]+=208.0. In addition, (2-methyl-6-(trifluoromethyl)pyridin-3-yl)methanol (1.90 g) was recovered.

1. washthe EtOAc solution was washed with 5% aqueous Na2S2O3, water
2. dry with materialsaturated aqueous NaCl, dried over Na2SO4
3. concentrationconcentrated under reduced pressure
4. customThe crude product was purified
5. washeluted with a gradient of EtOAc (30-100%) in hexanes