反应详情

Tetrabutylammonium fluoride (TBAF: 0.1 ml, 1M) in THF was added to a solution of 3,4-difluoro-benzaldehyde (1.42 g, 10 mmol) and (trifluoromethyl)trimethylsilane (1.70 g, 12 mmol) in 10 ml THF at 0° C. The mixture was warmed up to room temperature and stirred for 4 hours. The reaction mixture was treated with 12 ml of 1M HCl and stirred overnight. The product was extracted with dichloromethane (3×20 ml), the organic layer was combined and passed through a pad of silica gel. The organic solvent was evaporated to give 1.9 g of 1-(3,4-difluoro-phenyl)-2,2,2-trifluoro-ethanol, yield 90%.

1. stirringstirred overnight
2. extractionThe product was extracted with dichloromethane (3×20 ml)
3. customThe organic solvent was evaporated