反应详情

The crude 5-hydroxy-1-methylpyrazol-4-yl 3-(2-methoxyethoxy)-2-methyl-4-(methylsulfonyl)phenyl ketone obtained in the same manner as the above step (3) was dissolved in anhydrous THF (10 mL), and triethylamine (190 mg) and 96% S-ethyl chlorothiolformate (151 mg) were added, followed by stirring for 1 hour at room temperature. Ethyl acetate (200 mL) was added to the reaction mixture, and the mixture was washed twice with a saturated brine. The organic layer was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1) to obtain the desired product (250 mg).

1. washthe mixture was washed twice with a saturated brine
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. distillationthe solvent was distilled off under reduced pressure
4. customThe residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1)