反应详情

温度

25 °C

Ethyl 2-(4-nitro-3-(2,2,2-trifluoroethoxy)phenyl)acetate (4 g, 16.2 mmol) was dissolved in 50 mL anhydrous DMF and NaH (60% wt. in oil, 0.846 g, 21.1 mmol) was added at 0° C. The reaction mixture was stirred for 0.5 h at 25° C. and isobutyl bromide (2.12 mL, 19.5 mmol) was added drop wise at 0° C. The reaction mixture was stirred at 0° C. for 1 h and saturated NH4Cl solution was added. The reaction mixture was extracted with EtOAc (3×20 mL) and the combined organic phases were washed with water (3×20 mL) and brine (20 mL), dried over MgSO4, filtered and concentrated under reduced pressure to give ethyl 4-methyl-2-(4-nitro-3-(2,2,2-trifluoroethoxy)phenyl)pentanoate (1.5 g) as a colorless oil.

1. stirringThe reaction mixture was stirred at 0° C. for 1 h
2. extractionThe reaction mixture was extracted with EtOAc (3×20 mL)
3. washthe combined organic phases were washed with water (3×20 mL) and brine (20 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure