反应详情

温度

50 °C

Under ice cooling, potassium carbonate (7.23 g, 52.3 mmol) and benzyl bromide (5.45 mL, 45.8 mmol) were added to a solution of 4-nitro-3,5-bis(trifluoromethyl)phenol (12.0 g, 43.6 mmol) in acetone (250 mL). After stirring at 50° C. for 13 hours, the reaction mixture was filtered and the insoluble matter was washed with acetone. To the residue obtained by distilling the filtrate under reduced pressure, ethyl acetate and water were added to allow it to separate into layers. The aqueous layer was extracted twice with ethyl acetate. The organic layers were combined, washed successively with water and saturated saline, dried over anhydrous sodium sulfate, and distilled under reduced pressure to remove the solvent. The residue was recrystallized from hexane-acetone, whereby 15.0 g (yield: 94.3%) of 4-benzyloxy-2,6-bis(trifluoromethyl)nitrobenzene was obtained as pale yellow needle-like crystals.

1. filtrationthe reaction mixture was filtered
2. washthe insoluble matter was washed with acetone
3. customTo the residue obtained
4. distillationby distilling the filtrate under reduced pressure, ethyl acetate and water
5. additionwere added
6. customto separate into layers
7. extractionThe aqueous layer was extracted twice with ethyl acetate
8. washwashed successively with water and saturated saline
9. dry with materialdried over anhydrous sodium sulfate
10. distillationdistilled under reduced pressure
11. customto remove the solvent
12. customThe residue was recrystallized from hexane-acetone