2-(三氟甲基)苯乙酸乙酯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 585 mg (3.89 mmol) of sodium bromate were initially charged in 2 ml of water, and 300 mg (1.29 mmol) of ethyl 2-(trifluoromethyl)phenylacetate, dissolved in 2.5 ml of ethyl acetate, were added at RT. A solution of 403 mg (3.89 mmol) of sodium bisulfite in 3.8 ml of water was then added slowly. The mixture was stirred at RT for 18 h. 5 ml of 10% strength aqueous sodium dithionite solution were then added. The mixture was extracted with 15 ml of ethyl acetate, and the organic phase was washed in each case once with 5 ml of 10% strength sodium dithionite solution and 5 ml of saturated sodium chloride solution. The organic phase was dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 20:1, then 10:1). This gave 186 mg of a mixture consisting of the title compound and the starting material ethyl 2-(trifluoromethyl)phenylacetate (ratio 16:84 according to GC/MS [Method 20]). This mixture was once more reacted with 362 mg (2.40 mmol) of sodium bromate and 250 mg (2.40 mmol) of sodium bisulfite according to the procedure described above. Work-up gave a mixture of 31% title compound and 69% ethyl 2-(trifluoromethyl)phenylacetate, which was reacted further without any further purification. were added at RT The mixture was extracted with 15 ml of ethyl acetate the organic phase was washed in each case once with 5 ml of 10% strength sodium dithionite solution and 5 ml of saturated sodium chloride solution The organic phase was dried over sodium sulfate filtered concentrated under reduced pressure The crude product was purified by chromatography on silica gel (mobile phase Work-up gave

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 585 mg (3.89 mmol) of sodium bromate were initially charged in 2 ml of water, and 300 mg (1.29 mmol) of ethyl 2-(trifluoromethyl)phenylacetate, dissolved in 2.5 ml of ethyl acetate, were added at RT. A solution of 403 mg (3.89 mmol) of sodium bisulfite in 3.8 ml of water was then added slowly. The mixture was stirred at RT for 18 h. 5 ml of 10% strength aqueous sodium dithionite solution were then added. The mixture was extracted with 15 ml of ethyl acetate, and the organic phase was washed in each case once with 5 ml of 10% strength sodium dithionite solution and 5 ml of saturated sodium chloride solution. The organic phase was dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 20:1, then 10:1). This gave 186 mg of a mixture consisting of the title compound and the starting material ethyl 2-(trifluoromethyl)phenylacetate (ratio 16:84 according to GC/MS [Method 20]). This mixture was once more reacted with 362 mg (2.40 mmol) of sodium bromate and 250 mg (2.40 mmol) of sodium bisulfite according to the procedure described above. Work-up gave a mixture of 31% title compound and 69% ethyl 2-(trifluoromethyl)phenylacetate, which was reacted further without any further purification. were added at RT The mixture was extracted with 15 ml of ethyl acetate the organic phase was washed in each case once with 5 ml of 10% strength sodium dithionite solution and 5 ml of saturated sodium chloride solution The organic phase was dried over sodium sulfate filtered concentrated under reduced pressure The crude product was purified by chromatography on silica gel (mobile phase Work-up gave