Water → N-[2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-2-oxoethyl]phthalimide

Participants

Reaction Conditions

Reaction Steps

To 1.43 g of 2-bromo-1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]ethanone in 10 ml of N,N-dimethylformamide, 0.68 g of potassium phthalimide and 0.01 g of potassium iodide were added, and the mixture was stirred at 85° C. for 1 hour. After completion of the reaction, the reaction mixture was allowed to cool to room temperature, mixed with 10 ml of water and extracted with ethyl acetate (10 ml×3), the resulting organic layers were combined, washed with water and dried over saturated aqueous sodium chloride and then anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The resulting residue was purified by preparative medium pressure liquid chromatography (preparative medium pressure chromatograph: YFLC-Wprep manufactured by Yamazen Science, Inc.) using ethyl acetate-hexane (with a gradient of from 5:95 to 46:60) as the eluent to obtain 0.47 g of the desired product as a pale yellow resinous substance.

Provenance & Evidence