反应详情

Acetyl chloride (20 cc) was added dropwise over 10 minutes with stirring to methanol (400 cc); the resulting solution was added all at once to a magnetically stirred suspension of 3-(3,4-dimethoxyphenyl)propionic acid (500 g, 2.378 moles) in methanol (1.6 1) and 2,3-dimethoxypropane (250 cc). The reaction mixture was stirred overnight at room temperature and then at reflux for 1 hour. After cooling, the solution was evaporated in vacuo to a light yellow syrup; yield: 533 g (100%).

1. additionthe resulting solution was added all at
2. temperatureat reflux for 1 hour
3. temperatureAfter cooling
4. customthe solution was evaporated in vacuo to a light yellow syrup