反应详情

To a mixture of 3-methyl-2-(2-methylsulfanylphenyl)-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (0.32 g), methanol (4 ml) and water (6 ml), sodium periodate (0.42 g) was added under ice-cooling. The mixture was heated to room temperature, and stirred for 1 hour, and then heated to 40° C., and stirred with heating for further 1 hour. Into the reaction mixture cooled to room temperature 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-methylsulfinylphenyl)-3-methyl-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (hereinafter referred to as Present Compound 2).

1. additionwas added under ice-
2. temperaturecooling
3. temperatureheated to 40° C.
4. stirringstirred
5. temperaturewith heating for further 1 hour
6. additionwere poured
7. extractionextracted with chloroform 2 times
8. dry with materialThe combined organic layer was dried over magnesium sulfate
9. concentrationconcentrated under reduced pressure