Methyl iodide → 141807-86-5

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Reaction Steps

Compound 1 obtained in Example 1 (2.00 g, 5.90 mmol) was dissolved in 65 ml of N,N-dimethylformamide. To the solution were added 2.04 g (14.8 mmol) of potassium carbonate and then 0.74 ml (11.8 mmol) of methyl iodide, and the mixture was stirred at 50° C. for 30 minutes. After cooling, insoluble substances were removed by filtration, and 500 ml of water was added to the filtrate. The mixture was extracted three times with chloroform, and the combined organic layers were washed twice with water and twice with a saturated aqueous solution of sodium chloride, and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (eluent: 20% ethyl acetate/hexane), followed by recrystallization from ethanol/water to give 1.75 g (yield: 84%) of Compound 2 as white needles.

Provenance & Evidence