Dimethyl Sulfoxide → HCID 24780778, compound

Participants

Reaction Steps

A solution of 44 mg (0.35 mmol) of oxalyl chloride in 1 mL of dichloromethane is purged with argon and cooled to a temperature close to −70° C. A solution of 66 mg (0.8 mmol) of dimethyl sulfoxide in 1 mL of dichloromethane is added. Stirring is maintained at a temperature close to −70° C. for 15 minutes and a solution of 120 mg (0.3 mmol) of 2-cyano-N-[4-(2-{4-[3-(1-hydroxyethyl)phenyl]piperazin-1-yl}ethyl)cyclohexyl]acetamide trans/cis 80/20 in 4 mL of dichloromethane is added. After an additional stirring for 15 minutes at a temperature close to −70° C., 110 mg (1.08 mmol) of triethylamine are added. The mixture is allowed to warm to room temperature then stirred overnight at room temperature. The mixture is poured into water and extracted twice with ethyl acetate. The organic phases are combined, washed with water, then brine, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The oily residue is purified over 5 g silica gel (eluant dichloromethane/methanol 98/2 then 95/5). To give 25 mg (21%) of N-(4-{2-[4-(3-acetylphenyl)piperazin-1-yl]ethyl}cyclohexyl)-2-cyanoacetamide trans/cis 80/20 as a white solid.

Provenance & Evidence