Dimethyl Sulfoxide → 5-bromo-1-ethyl-1H-pyrimidin-2-one

Participants

Reaction Conditions

Reaction Steps

With cooling with ice, potassium carbonate (13.2 g, 95.7 mmol) and ethyl iodide (2.84 mL, 35.6 mmol) were added to a dimethyl sulfoxide (130 mL) solution of 5-bromo-2-hydroxypyrimidine hydrobromide (7.0 g, 27.3 mmol), and stirred at 15° C. for 16 hours. Water was added to the reaction mixture, and extracted three times with ethyl acetate. The organic layer was washed with saturated brine, dried with anhydrous sodium sulfate and then concentrated under reduced pressure. The organic layer was washed with saturated brine, dried with anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified through silica gel column chromatography (C-300, hexane/ethyl acetate=1/1) to obtain the entitled compound (3.34 g, 60%) as a colorless solid.

Provenance & Evidence