反应详情

温度

15 °C

At 15° C., methyl 4-acetylbenzoate (2.23 g) was dissolved in a hydrobromic acid acetic acid solution (30%, 10 ml). Bromine was gradually added dropwise to the reaction mixture to maintain its temperature at 15° C. After stirring for 10 minutes, the reaction mixture was cooled to 4° C. A mixed solvent of methanol (50 ml) and water (50 ml) was added to the reaction mixture for crystallization, followed by washing with hexane. By the collection through filtration, the title compound (2.29 g, 71%) was obtained as a colorless solid.

1. temperaturethe reaction mixture was cooled to 4° C
2. washby washing with hexane
3. customBy the collection
4. filtrationthrough filtration