反应详情

To a mixture of 0.30 g of 2-(3-fluoropyridin-4-yl)-1-methyl-5-trifluoromethyl-1H-benzimidazole and 10 ml of DMF was added 0.16 g of sodium methoxide under ice cool, then, the mixture was heated up to room temperature and stirred for 1.5 hours. A saturated ammonium chloride aqueous solution was poured, and the mixture was extracted three times with ethyl acetate. The combined organic layers were dried over magnesium sulfate, then, concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to obtain 0.28 g of 2-(3-methoxypyridin-4-yl)-1-methyl-5-trifluoromethyl-1H-benzimidazole (hereinafter, referred to as present active compound 8).

1. temperaturecool
2. extractionthe mixture was extracted three times with ethyl acetate
3. dry with materialThe combined organic layers were dried over magnesium sulfate
4. concentrationconcentrated under reduced pressure