反应详情

0.60 g of 2-ethoxy-4-(trifluoromethyl)benzaldehyde was dissolved in 5 ml dimethyl sulfoxide and an aqueous solution (1 ml) of 67 mg sodium dihydrogen phosphate, and an aqueous solution (3 ml) of 0.35 g sodium chlorite was added dropwise. After stirring at room temperature for 12 hours, water was added thereto, followed by extracting with ethyl acetate. The extract was washed with brine, dried over anhydrous magnesium sulfate and the solvent was evaporated. The residue was subjected to silica gel column chromatography, and from fractions eluted with hexane-ethyl acetate (2:1), 0.55 g of 2-ethoxy-4-(trifluoromethyl)benzoic acid was obtained.

1. extractionby extracting with ethyl acetate
2. washThe extract was washed with brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customthe solvent was evaporated
5. washfrom fractions eluted with hexane-ethyl acetate (2:1)