反应详情

温度

90 °C

To a solution of ethyl 2-methyl-3-[(methylsulfonyl)oxy]benzoate (116b, 3.0 g, 12 mmol) in trifluoroacetic acid (35 mL) and trifluoroacetic anhydride (15 mL) was added potassium persulfate (3.5 g, 13 mmol) and dichloro(p-cymene)ruthenium(II) dimer (0.36 g, 0.59 mmol). The resulting mixture was stirred at 90° C. in a sealed tube for 22 hours. The reaction mixture was concentrated under vacuum then diluted with water (50 mL) and extracted with dichloromethane (2×75 mL). The combined organic layers were washed with brine (50 mL), dried over magnesium sulfate, concentrated under vacuum, and purified by column chromatography (40% EtOAc/Heptane) to give ethyl 6-hydroxy-2-methyl-3-[(methylsulfonyl)oxy]benzoate (116c, 1.3 g, 41% yield) as a white solid.

1. concentrationThe reaction mixture was concentrated under vacuum
2. additionthen diluted with water (50 mL)
3. extractionextracted with dichloromethane (2×75 mL)
4. washThe combined organic layers were washed with brine (50 mL)
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated under vacuum
7. custompurified by column chromatography (40% EtOAc/Heptane)