Hydroxyamine hydrochloride → N-[2-(3,5-dichloropyridin-2-yl)-2-(hydroxyimino)ethyl]-2-(trifluoromethyl)benzamide

Participants

Reaction Steps

To a solution of 3.38 g of N-[2-(3,5-dichloropyridin-2-yl)-2-oxoethyl]-2-(trifluoromethyl)benzamide and 0.934 g of hydroxylamine hydrochloride in 20 ml of ethanol, 1.10 g of sodium acetate was added, and the mixture was stirred at room temperature for 12 hours. After completion of the reaction, the solvent was evaporated under reduced pressure, the resulting residue was mixed with 40 ml of water and extracted with ethyl acetate (20 ml×2), the resulting organic layers were combined, washed with water (20 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 2:8 to 4:6) as the eluent to obtain 1.90 g of the desired product as white crystals.

Provenance & Evidence