Hydrochloric Acid → N-[2-(3,5-dichloropyridin-2-yl)-2-nitroethyl]-2-(trifluoromethyl)benzamide

Participants

Reaction Steps

To 6.57 g of potassium tert-butoxide in 100 ml of N,N-dimethylformamide, 10.10 g of 3,5-dichloro-2-(nitromethyl)pyridine was added dropwise with stirring under cooling with ice, and after the addition, the mixture was stirred at the same temperature for another 30 minutes. Then, to the reaction mixture, 11.59 g of N-chloromethyl-2-(trifluoromethyl)benzamide in 50 ml of N,N-dimethylformamide was added dropwise with stirring under cooing with ice, and after the addition, the mixture was stirred at room temperature for another 2 hours. After completion of the reaction, the reaction mixture was carefully poured into 100 ml of ice-water, acidified with 10% aqueous hydrochloric acid and extracted with ethyl acetate (100 ml×2). The resulting organic layers were combined, washed with water (100 ml×1) 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 silica gel column chromatography using ethyl acetate-hexane (with a gradient of from 1:9 to 3:7) as the eluent to obtain 14.00 g of the desired product as a pale yellow resinous substance.

Provenance & Evidence