Formic Acid → HCID 9935464, compound

Participants

Reaction Steps

Acetic anhydride (0.63 ml) was added directly to formic acid (2.48 ml). The solution was stirred at room temperature for 30 minutes and then added a solution of N-[2-{[4-(5-chloropyridin-2-yl)piperazino]sulfonyl}-1-(3,4-dichlorophenyl)ethyl]hydroxylamine (0.6 g) in tetrahydrofuran (10 ml). The solution was stirred at room temperature for 3 hours and then diluted with ethyl acetate, neutralised the pH with saturated aqueous sodium hydrogen carbonate solution The ethyl acetate layer was separated, dried (Na2SO4), and evaporated to dryness. The residue was purified by chromatography using a 10 g silica isolute eluting with 10% ethyl acetate/heaxane—80% ethyl acetate/hexane and then evaporated to dryness. The resulting white solid was filtered from diethyl ether to give N-[2-{[4-(5-chloropyridin-2-yl)piperazino]sulfonyl}-1-(3,4-dichlorophenyl)ethyl]-N-hydroxyformamide (0.43 1 g), 211-212° C.

Provenance & Evidence