反应详情

Ethyl 2-(5-chloro-6-(2,2,2-trifluoroethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)acetate (0.6 g, 0.49 mmol) was dissolved in anhydrous DMF (30 mL), NaH (60% wt. in paraffin oil, 0.039 g, 1.69 mmol) was added at 0° C. The reaction mixture was stirred for 30 min at room temperature and cyclobutylmethyl bromide (0.223 g, 1.49 mmol) was added drop wise at 0° C. The reaction mixture was stirred an additional 1 h at 0° C. and saturated NH4Cl solution (10 mL) 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), and dried over MgSO4 The volatiles were removed under reduced pressure and the residue was purified by flash column chromatography to yield ethyl 2-(5-chloro-6-(2,2,2-trifluoroethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)-3-cyclobutylpropanoate (0.25 g) as a colorless liquid.

1. stirringThe reaction mixture was stirred an additional 1 h at 0° C.
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 The volatiles
5. customwere removed under reduced pressure
6. customthe residue was purified by flash column chromatography