反应详情

A solution of (S)-3-((R)-2-(4-methoxyphenyl)propanoyl)-4-benzyloxazolidin-2-one (1.50 g, 4.42 mmol) in THF (20 ml) was added to a mixture of lithium hydroxide (750 mg, 17.6 mmol) and hydrogen peroxide (0.9 ml, 26.5 mmol, 30% in water). The reaction mixture was stirred at room temperature for 3 h. Then the solvent was evaporated, the residue was acidified with diluted HCl (10 ml) and extracted with DCM (3×50 ml). The combined organic layers was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude compound was purified by column chromatography over silica gel (60-120 mesh) using ethyl acetate (20%) in petroleum ether as eluent to afford 600 mg (76%) of (R)-2-(4-methoxyphenyl)propanoic acid as colorless liquid.

1. customThen the solvent was evaporated
2. extractionextracted with DCM (3×50 ml)
3. dry with materialThe combined organic layers was dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customThe crude compound was purified by column chromatography over silica gel (60-120 mesh)