反应详情

温度

80 °C

To solution of tert-butyl 2-(2-bromo-4-formylphenoxy)acetate (1) (120 g, 0.38 mol) in dioxane/H2O (4:1, 700 mL) was added 3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (20) (158 g in 60% purity, 0.38 mol), Na2CO3 (81 g, 0.76 mol) and Pd(PPh3)4 (22 g, 19 mmol) under N2. The mixture was stirred at 80° C. for 3 h. After cooling to room temperature, the mixture was concentrated in vacuo and purified by column chromatography (PE:EA=10:1 v/v) to give 90 g of t-butyl 2-(2-(3-cyano-5-fluorophenyl)-4-formylphenoxy)acetate (21) (90 g, 67%).

1. temperatureAfter cooling to room temperature
2. concentrationthe mixture was concentrated in vacuo
3. custompurified by column chromatography (PE:EA=10:1 v/v)