Dimethyl Sulfoxide → HCID 21891617, compound

Participants

Reaction Steps

Oxalyl chloride (0.78 mL) was dissolved in dichloromethane (10 mL), DMSO (1.49 mL) was added dropwise at −78° C., and the mixture was stirred for 30 minutes. After a solution of 2-hydroxymethyl-5,6,7-trimethoxy-benzothiazole (1.53 g) in dichloromethane (10 mL) was added dropwise at −78° C. to the mixture, stirring was conducted for 1 hour, triethylamine (6.46 mL) was added, and the resultant mixture was warmed to room temperature. After an aqueous solution of ammonium chloride was added to the mixture, extraction was conducted with dichloromethane. The resultant organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (ethyl acetate:hexane=1:9) to obtain the title compound.

Provenance & Evidence