反应详情

温度

170 °C

A mixture of aldehyde 232 (500 mg, 2.53 mmol), 2-fluoro-4-nitrophenol (595 mg, 3.79 mmol), K2CO3 (700 mg, 5.06 mmol) and Ph2O (3.4 mL) was stirred in a sealed tube for 12 h at 170° C. The mixture was suspended in a water/EtOAc mixture, sonicated a few minutes and filtered, the solid residue was washed successively with water, EtOAc and ether, giving crude 233 (500 mg, 1.17 mmol, 46% yield) that was used in the next step without further purification. MS (m/z): (M+1) 319.0 (14%), (M+MeOH+1) 351.0 (100%).

1. customsonicated a few minutes
2. filtrationfiltered
3. washthe solid residue was washed successively with water, EtOAc and ether