反应详情

35.3 g (0.212 mol) of cinnamic acid chloride and 100 mL of methyl ethyl ketone were placed in a reaction vessel and stirred under a nitrogen atmosphere. 28.2 g (0.225 mol) of 2-bromoethanol and 21 g of pyridine were dissolved in 100 mL of methyl ethyl ketone and added dropwise in the aforementioned reaction vessel. After completion of dropping, the solution was refluxed with stirring for 2 hours and cooled. Pyridine hydrochloride was precipitated, and then separated from the solution by filtration. The filtrate was concentrated and then dissolved in methylene chloride. The solution of methylene chloride was poured into a separating funnel and washed with water. Then the solution was dried with anhydrous sodium sulfate and concentrated. Thus 47 g of 2-bromoethyl cinnamate was obtained.

1. additionadded dropwise in the aforementioned reaction vessel
2. temperaturethe solution was refluxed
3. stirringwith stirring for 2 hours
4. temperaturecooled
5. customPyridine hydrochloride was precipitated
6. customseparated from the solution by filtration
7. concentrationThe filtrate was concentrated
8. dissolutiondissolved in methylene chloride
9. additionThe solution of methylene chloride was poured into a separating funnel
10. washwashed with water
11. dry with materialThen the solution was dried with anhydrous sodium sulfate
12. concentrationconcentrated