Dimethyl Sulfoxide → HCID 54007205, compound

Participants

Reaction Conditions

Reaction Steps

A solution of dimethylsulfoxide (0.079 g) in dichloromethane (2 mL) was added over 20 minutes to a stirred solution of oxalyl chloride (0.123 g) in dry dichloromethane (4 mL) maintained throughout at 178° C. by using an acetone-dry ice bath. After 30 minutes at -78° C., a solution of rac-4-[4-hydroxy-4-(2-naphthalenyl)butoxy]-alpha-oxobenzeneacetic acid methyl ester (0.356 g) in dichloromethane (3 mL) was added over 30 minutes and the reaction mixture was stirred for 30 minutes in the acetone-dry ice bath, then triethylamine (0.144 mL) was added. The cooling bath was removed and the reaction was allowed to equilibrate to room temperature, then water was added and the phases were separated. After the aqueous layer was extracted with dichlormethane (2×7 mL), the combined organic layers were washed with brine, then were dried (MgSO4) and evaporated. The residue was purified by flash chromatography over silica gel (ethyl acetate-hexane; 1:3) and then crystallized from ethyl acetate-hexane to furnish in two crops, 0.299 g of 4-[[4-(2-naphthalenyl)-4-oxobutyl]oxy]-alpha-oxobenzeneacetic acid methyl ester, mp 86°-87° C.

Provenance & Evidence