反应详情

Into a 100-mL round-bottom flask, was placed 1-chloro-3-(trifluoromethyl)-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene (680 mg, 2.48 mmol, 1.00 equiv), a solution of N-[[4-bromo-3-(2,2,2-trifluoroethyl)phenyl]methylidene]hydroxylamine (700 mg, 2.48 mmol, 1.10 equiv) in dichloromethane (20 mL), NaClO (10 mL). The resulting solution was stirred overnight at room temperature. The reaction was then quenched by the addition of 10 mL of water. The resulting solution was extracted with 3×20 mL of dichloromethane and the organic layers combined. The resulting mixture was washed with 3×20 mL of brine. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:30-1:10). This resulted in 600 mg (50%) of 3-[4-bromo-3-(2,2,2-trifluoroethyl)phenyl]-5-[3-chloro-5-(trifluoromethyl)phenyl]-4,5-dihydro-1,2-oxazole as yellow oil.

1. customInto a 100-mL round-bottom flask, was placed
2. customThe reaction was then quenched by the addition of 10 mL of water
3. extractionThe resulting solution was extracted with 3×20 mL of dichloromethane
4. washThe resulting mixture was washed with 3×20 mL of brine
5. concentrationThe resulting mixture was concentrated under vacuum
6. customThis resulted in 600 mg (50%) of 3-[4-bromo-3-(2,2,2-trifluoroethyl)phenyl]-5-[3-chloro-5-(trifluoromethyl)phenyl]-4,5-dihydro-1,2-oxazole as yellow oil