反应详情

To a stirred solution of 4-bromo-2-fluorobenzaldehyde (3.38 g; 16 mmol) in 35 mL methanol at ambient temperature was added sodium methoxide solution (4.0 mL of 25% solution; 17.6 mmol), and the resulting solution was stirred and heated to reflux. After refluxing for 2 hours the solvent was evaporated. The residue was partitioned between 100 mL dichloromethane and 50 mL water. The organic layer was dried over sodium sulfate and evaporated. The residue was purified by silica gel chromatography to give 2.13 g of 4-bromo-2-methoxybenzaldehyde as a white solid. MS (apci, neg) m/z=199.

1. temperatureheated to reflux
2. temperatureAfter refluxing for 2 hours the solvent
3. customwas evaporated
4. customThe residue was partitioned between 100 mL dichloromethane and 50 mL water
5. dry with materialThe organic layer was dried over sodium sulfate
6. customevaporated
7. customThe residue was purified by silica gel chromatography