2-Bromo-1,1-dimethoxyethane → HCID 57428870, compound

Participants

Reaction Steps

2-(Methylthio)-4-(thiophen-2-yl)pyrimidine-5-carbothioamide (0.3 g, 1.12 mmol) suspended in ethanol (2 mL) was treated with bromoacetaldehyde dimethylacetal (0.158 mL, 1.34 mmol). The reaction was stirred at reflux overnight. No product formtion was obverved by thin layer chromatography in 20% ethyl acetate/hexanes. Another equivalent of bromoacetaldehyde dimethylacetal was added to the reaction in addition to a few drops of concentrated hydrochloric acid and the reaction kept at reflux for another 3 h. The reaction was cooled down to room temperature and the volatiles removed in vacuo. A solution of saturated sodium bicarbonate was added to the residue, which was extracted with dichloromethane. The organic layer was dried with sodium sulfate and purified by flash chromatography using a gradient of 20 to 60% of ethyl acetate in hexanes. The product was obtained as a brown solid (0.18 g). MS (M+H)+ 292.

Provenance & Evidence