反应详情

To a stirred suspension of methyl 3-bromo-4-hydroxybenzoate (270 g, 1168 mmol) in DCM (1.5 L) was added pyridine (150 mL). Acetyl chloride (87 mL, 1227 mmol) was then added dropwise at room temperature and under nitrogen. The mixture was left to stir for 2 h at room temperature. Water (1 L) was then added followed by HCl 2N until pH 1. The organic layer was then washed with water, brine, dried over MgSO4, filtered and evaporated to dryness to afford methyl 4-acetoxy-3-bromobenzoate (300 g, 94%) as a white powder.

1. waitThe mixture was left
2. washThe organic layer was then washed with water, brine
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. customevaporated to dryness