反应详情

To a mixture of 3-methyl-2-(2-methylsulfanylphenyl)-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (0.30 g) and chloroform (9 ml), 69% of 3-chloroperbenzoic acid (0.70 g) was added under ice-cooling, and then heated to room temperature, and stirred for 2 hours. Then, into the mixture, saturated aqueous sodium hydrogen carbonate solution and saturated aqueous sodium thiosulfate solution were poured, and extracted with chloroform 2 times. The combined organic layer was dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography to give 0.32 g of 2-(2-methylsulfonylphenyl)-3-methyl-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (hereinafter referred to as Present Compound 3).

1. additionwas added under ice-
2. temperaturecooling
3. extractionextracted with chloroform 2 times
4. dry with materialThe combined organic layer was dried over magnesium sulfate
5. concentrationconcentrated under reduced pressure