反应详情

A solution of lithium aluminum hydride (0.1 mol) in THF (100 ml) was added dropwise to a stirred suspension of 3,4-dimethoxycinnamic acid (41.6 g, 0.2 mol) in THF (150 ml) at room temperature. After the addition, the mixture was stirred for 2 hous, and the solution was evaporated in vacuo to a residue, which was partitioned between dichloromethane and aqueous sodium hydroxide. The organic layer was washed three times with water, dried, and evaporated to an oil. Crystallization from ethyl acetate-hexane gave 3,4-dimethoxycinnamyl alcohol (24 g, 62%), m.p. 76°-77° C.

1. additionAfter the addition
2. customthe solution was evaporated in vacuo to a residue, which
3. customwas partitioned between dichloromethane and aqueous sodium hydroxide
4. washThe organic layer was washed three times with water
5. customdried
6. customevaporated to an oil
7. customCrystallization from ethyl acetate-hexane