Water → HCID 88204903, compound

Participants

Reaction Steps

5 ml of dichloromethane, 5 ml of water and 0.10 g (0.72 mmol, 1 equivalent) of potassium carbonate were added to 0.26 g (0.75 mmol) of 5-methyl-6-(1-ethyl-5-hydroxypyrazol-4-yl)carbonylthiochroman-1,1-dioxide in a 30-ml eggplant type flask. While the mixture was stirred at room temperature, a solution of 0.16 g (0.82 mmol, 1.1 equivalents) of p-toluenesulfonyl chloride in 1 ml of dichloromethane was dropwise added at room temperature. 5 mg of benzyltriethyl-ammonium chloride (BTEAC) was added, and the mixture was allowed to react at the above temperature for 2 hours and then liquid-separated. An aqueous layer was extracted with dichloromethane. An organic layer was washed with a saturated sodium chloride aqueous solution and dried over sodium sulfate. The solvent was distilled off to give 0.24 g of a crude product, and the crude product was recrystallized from ethanol to give 0.14 g (yield 92%) of 5-methyl-6-(1-ethyl-p-toluenesulfonyloxypyrazol-4-yl)carbonylthiochroman-1,1-dioxide (Compound No. 59).

Provenance & Evidence