反应详情

温度

40 °C

To a solution of 4-hydroxy-3-methyl benzaldehyde (3 g, 22 mmol) and ethyl 2-bromo-2-methylpropionate (6.5 mL, 44 mmol) in DMF (100 mL) was added caesium carbonate (15.8 g, 48 mmol). The resulting mixture was heated at 40° C. for 42 h, then allowed to cool to room temperature. The reaction mixture was diluted with water (200 mL) and extracted with EtOAc (2×150 mL). The organic solution was dried (MgSO4), filtered and evaporated. Purification by Biotage™ chromatography (Silica, 90 g) eluting 9:1 cyclohexane:EtOAc afforded the title compound as a pale yellow oil (3.5 g).

1. temperatureto cool to room temperature
2. extractionextracted with EtOAc (2×150 mL)
3. dry with materialThe organic solution was dried (MgSO4)
4. filtrationfiltered
5. customevaporated
6. customPurification by Biotage™ chromatography (Silica, 90 g)
7. washeluting 9:1 cyclohexane