反应详情

bis(3-Fluorophenyl)acetaldehyde (4.82 g, 0.0208 mol) was dissolved in dichloromethane (50 ml) and tetra-n-butylammonium bromide (0.67 g, 0.00208 mol) was added. 12 N sodium hydroxide solution (50 ml) and 1,2-dibromoethane (17.9 ml, 0.208 mol) were introduced and the mixture was stirred vigorously at room temperatue for 20 h. Dichloromethane (100 ml) and saturated brine (50 ml) were added, and the phases were separated. The aqueous phase was extracted further with dichloromethane (50 ml) and the combined dichloromethane extracts were washed with water (2×75 ml) and saturated brine (50 ml). Drying of the dichloromethane solution (Na2SO4) and evaporation provided 1-(2-(2-bromoethoxy)-1-(3-fluoro-phenyl)ethenyl)-3-fluorobenzene as an oil (6.66 g, 95%).

1. customthe phases were separated
2. extractionThe aqueous phase was extracted further with dichloromethane (50 ml)
3. washthe combined dichloromethane extracts were washed with water (2×75 ml) and saturated brine (50 ml)
4. dry with materialDrying of the dichloromethane solution (Na2SO4) and evaporation