反应详情

温度

0 °C

To a cooled (0° C.) solution of ethyl 3-hydroxy-2-methylbenzoate (116a, 2.4 g, 13 mmol) and N,N-diisopropylethylamine (5.8 mL, 33 mmol) in dichloromethane (50 mL) was added drop wise methanesulfonyl chloride (1.4 mL, 17 mmol). The reaction mixture was stirred at 0° C. for 30 minutes then diluted with water (20 mL) and extracted with dichloromethane (2×25 mL). The combined organic extracts were dried over magnesium sulfate, concentrated under vacuum, and purified by column chromatography (30% EtOAc/Heptane) to give ethyl 2-methyl-3-[(methylsulfonyl)oxy]benzoate (116b, 3.0 g, 88% yield) as a yellow oil.

1. extractionextracted with dichloromethane (2×25 mL)
2. dry with materialThe combined organic extracts were dried over magnesium sulfate
3. concentrationconcentrated under vacuum
4. custompurified by column chromatography (30% EtOAc/Heptane)