反应详情

温度

60 °C

A mixture of ethyl 3-oxo-3-(4-trifluoromethylphenyl)propionate (38.2 g, 0.147 mol), 4-fluorobenzyl bromide (25 g, 0.13 mol), potassium carbonate (36.6 g, 0.26 mol) and acetonitrile (500 ml) was stirred at 60° C. for 3 hrs. The reaction solution was concentrated under reduced pressure, and water (500 ml) was added. The mixture was extracted with ethyl acetate (500, 200 ml). The extract was washed with water, dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=50:1-10:1, hexane:toluene=1:1) and crystallized from cold hexane to give ethyl 2-((4-fluorophenyl)methyl)-3-oxo-3-(4-(trifluoromethyl)phenyl)propionate (29.5 g, 55%).

1. concentrationThe reaction solution was concentrated under reduced pressure, and water (500 ml)
2. additionwas added
3. extractionThe mixture was extracted with ethyl acetate (500, 200 ml)
4. washThe extract was washed with water
5. dry with materialdried over anhydrous magnesium sulfate
6. customevaporated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=50:1-10:1, hexane:toluene=1:1)
8. customcrystallized from cold hexane