反应详情

To a 250-mL round bottom flask were added, in turn, 5.57 g (33.9 mmol) of 2-hydroxycinnamic acid, 80 mL of methanol, and 6 drops of concentrated sulfuric acid. The resulting clear solution was heated to reflux for 6 hours and then allowed to cool to room temperature. The solvent was removed in vacuo to give a sticky white solid. The solid was dissolved in 80 mL of ethyl acetate, and washed with: 3 40-mL portions of 10% aqueous sodium bicarbonate; 1 40-mL portion of water; and 2 25 mL portions of brine. The organic layer was concentrated in vacuo to give 5.51 g (91.4%) of methyl 2-hydroxycinnamate as a white solid.

1. temperatureThe resulting clear solution was heated
2. temperatureto reflux for 6 hours
3. customThe solvent was removed in vacuo
4. customto give a sticky white solid
5. washwashed with: 3 40-mL portions of 10% aqueous sodium bicarbonate
6. concentrationThe organic layer was concentrated in vacuo