反应详情

A mixture of methyl-2-bromo-5-hydroxybenzoate (1.0 g, 4.33 mmol), benzyl bromide (0.62 mL, 5.19 mmol), and K2CO3 (780 mg, 5.63 mmol) in anhydrous DMF (8 mL) was stirred at room temperature for 21 h under nitrogen atmosphere. The mixture was poured into equal volumes of water and EtOAc (1:1, 20 mL), then the layers were separated. The aqueous layer was further extracted with equal volume of EtOAc before the organic layers were combined and dried over anhydrous Na2SO4 and filtered. The solvent was removed under reduced pressure. The residue was purified by silica gel column using Combiflash to give methyl 5-(benzyloxy)-2-bromobenzoate (1.39 g, 100%).

1. customthe layers were separated
2. extractionThe aqueous layer was further extracted with equal volume of EtOAc before the organic layers
3. dry with materialdried over anhydrous Na2SO4
4. filtrationfiltered
5. customThe solvent was removed under reduced pressure
6. customThe residue was purified by silica gel column