反应详情

温度

0 °C

To a solution of methyl 3-hydroxy-4-methylbenzoate (3.0 g, 18.1 mmol) in pyridine (20 mL) was added methanesulfonyl chloride (2.80 mL, 36.1 mmol) under stirring at 0° C., and the mixture was stirred at room temperature for 3 hr. The solvent was evaporated under reduced pressure, and the residue was partitioned between ethyl acetate and 1 N hydrochloric acid. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=9/1-hexane/ethyl acetate=1/1) to give the title compound (4.11 g, yield 93%) as a yellow oil.

1. stirringthe mixture was stirred at room temperature for 3 hr
2. customThe solvent was evaporated under reduced pressure
3. customthe residue was partitioned between ethyl acetate and 1 N hydrochloric acid
4. washThe organic layer was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=9/1-hexane/ethyl acetate=1/1)