反应详情

1.4 g (12 mmol) of 30% strength aqueous hydrogen peroxide solution were added to 2.7 g (6 mmol) of ethyl 3-(2,4-dichloro-5-(4-chloro-5-difluoromethoxy-1-methyl-1H-pyrazol-3-yl)Phenyl)-2-cyanopropenoate in 30 ml of ethanol. After 12 hours the mixture was poured into water. The product was extracted from the aqueous phase using ethyl acetate, after which the organic phase was dried over magnesium sulfate and then concentrated. Purification of the crude product was carried out by means of column chromatography on silica gel (eluent: hexane/ethyl acetate=4:1). Yield: 1 g.

1. extractionThe product was extracted from the aqueous phase
2. dry with materialafter which the organic phase was dried over magnesium sulfate
3. concentrationconcentrated
4. customPurification of the crude product