反应详情

To a solution of sodium hydride (60% in mineral oil, 0.471 g, 11.03 mmol) in THF (10 mL) at 0° C. was added trimethyl phosphonoacetate (1.1 mL, 7.58 mmol). Additional THF (15 mL) was added to facilitate stirring and the solution was warmed to room temperature over 15 minutes. After cooling to 0° C., 5-(4-bromo-phenyl)-3-methyl-isoxazole-4-carbaldehyde (1.834 g, 6.89 mmol) in THF (8 mL) was added and the reaction was stirred at room temperature for 10 minutes. The mixture was extracted with EtOAc and aqueous NH4Cl, dried over MgSO4, filtered and concentrated. The residue was purified by silica gel chromatography to give the title compound.

1. temperatureAfter cooling to 0° C.
2. stirringthe reaction was stirred at room temperature for 10 minutes
3. extractionThe mixture was extracted with EtOAc and aqueous NH4Cl
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by silica gel chromatography