反应详情

温度

80 °C

To a suspension of fresh sodium hydride (0.813 g, 33.9 mmol) in dry DMF (20 ml) under nitrogen atmosphere was added the solution of methyl-2-[(t-butoxycarbonyl)amino]-3-(4-hydroxyphenyl)propanoate (10 g, 33.9 mmol) in DMF (20 ml) slowly. The mixture was stirred for 15 minutes. 4-Fluorobenzaldehyde (4.20 g, 33.9 mmol) was added and the mixture was heated to 80° C. After completion of the reaction, the solvent was removed by high vacuum and the mixture was quenched with addition of saturated aqueous ammonium chloride. The mixture was extracted with ethyl acetate (3×50 ml). After washing with brine and dried on anhydrous sodium sulfate, the solvent was evaporated and the product was purified with flash column from eluent of hexanes: ethyl ether; 12/30 to 12/22 to afford the title compound as an oil (yield 11.5 g, 85.0%).

1. customAfter completion of the reaction
2. customthe solvent was removed by high vacuum
3. customthe mixture was quenched with addition of saturated aqueous ammonium chloride
4. extractionThe mixture was extracted with ethyl acetate (3×50 ml)
5. washAfter washing with brine
6. dry with materialdried on anhydrous sodium sulfate
7. customthe solvent was evaporated
8. customthe product was purified with flash column from eluent of hexanes