反应详情

温度

120 °C

(3-Bromo-5-trifluoromethyl-phenyl)-methanol (33.9 g) is dissolved in N,N-dimethylformamide (400 mL) and thereto are added zinc(II) cyanide (16.39 g) and tetrakis(triphenylphosphine)palladium (7.68 g) and the mixture is heated under nitrogen atmosphere at 120° C. for 2 hours. The reaction solution is allowed to cool to room temperature, and filtered through Celite™, and the filtrate is concentrated under reduced pressure. Thereto is added water and the mixture is extracted with ethyl acetate. The organic layer is washed with a saturated brine, dried over sodium sulfate, and concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to give 3-hydroxymethyl-5-trifluoromethyl-benzonitrile (23.4 g). NMR (CDCl3): 2.09 (1H, t), 4.85 (2H, d), 7.83 (1H, s), 7.87 (2H, s)

1. temperatureto cool to room temperature
2. filtrationfiltered through Celite™
3. concentrationthe filtrate is concentrated under reduced pressure
4. additionThereto is added water
5. extractionthe mixture is extracted with ethyl acetate
6. washThe organic layer is washed with a saturated brine
7. dry with materialdried over sodium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=2:1)