反应详情

温度

0 °C

Ethyl 2-(5-chloro-6-(2,2,2-trifluoroethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)acetate (0.75 g, 1.70 mmol) was dissolved in anhydrous DMF (20 mL), NaH (60% wt. in paraffin oil, 0.049 g, 2.04 mmol) was added at 0° C. The reaction mixture was stirred for 30 min at room temperature, upon which isobutyl bromide (0.2 mL, 1.87 mmol), was added in a drop wise manner at 0° C. The reaction mixture was stirred an additional 1 h at 0° C. and then saturated NH4Cl solution (10 mL) was added. The reaction mixture was extracted with EtOAc (3×20 mL) and the combined organic layers were washed with water (2×10 mL) and brine (10 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to give a colorless oil, witch was purified by flash column chromatography to give ethyl 2-(5-chloro-6-(2,2,2-trifluoroethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)-4-methylpentanoate (0.5 g, 59% yield) as a thick liquid.

1. additionwas added in a drop wise manner at 0° C
2. extractionThe reaction mixture was extracted with EtOAc (3×20 mL)
3. washthe combined organic layers were washed with water (2×10 mL) and brine (10 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customto give a colorless oil, witch
8. customwas purified by flash column chromatography