反应详情

温度

100 °C

In 445 mL of propyl acetate, was dissolved the compound obtained in Example 11 (29.7 g, 167 mmol). The resulting solution was heated at 100° C. for 1 hour. The solution was then cooled with ice to keep the internal temperature of the reaction system at 10° C. To the cooled solution, was added 22.8 mL of a 48% hydrobromic acid. The obtained mixture was allowed to stand under cooling with ice for 1 hour and 30 minutes. The aqueous layer was separated, and the organic layer was washed with 50 mL of water, dried with magnesium sulfate, vacuum concentrated and dried to obtain 35.3 g of a brown transparent oil 3-(bromomethyl)-5-methylbenzo[b]thiophene. (yield=88%).

1. temperatureThe solution was then cooled with ice
2. customat 10° C
3. temperatureunder cooling with ice for 1 hour and 30 minutes
4. customThe aqueous layer was separated
5. washthe organic layer was washed with 50 mL of water
6. dry with materialdried with magnesium sulfate, vacuum
7. concentrationconcentrated
8. customdried