反应详情

A RBF was charged with 1-bromo-3-fluoro-5-methoxybenzene (2.104 g, 10.26 mmol), (3-chlorophenyl)boronic acid (1.765 g, 11.29 mmol), potassium carbonate (4.25 g, 30.8 mmol), and Pd(Ph3P)4 (0.593 g, 0.513 mmol). The flask was flushed with Ar (g), then 1,4-dioxane (25.7 ml) and water (8.55 ml) were added. A reflux condenser was attached, and the flask was lowered into a 90° C. heating bath for 45 min. The mixture was cooled to room temperature, diluted with water, and extracted with EtOAc (2×). The combined organic extracts were dried over sodium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica gel (50-g SNAP Ultra column, 25-g silica gel column, 0-5% EtOAc/Heptane) to give 3′-chloro-3-fluoro-5-methoxy-1,1′-biphenyl (2.47 g, 10.44 mmol, 102% yield) as a clear oil containing about 10 wt % impurities.

1. customThe flask was flushed with Ar (g)
2. addition1,4-dioxane (25.7 ml) and water (8.55 ml) were added
3. customA reflux condenser was attached
4. customwas lowered into a 90° C.
5. temperatureheating bath for 45 min
6. additiondiluted with water
7. extractionextracted with EtOAc (2×)
8. dry with materialThe combined organic extracts were dried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated
11. customThe residue was purified by chromatography on silica gel (50-g SNAP Ultra column, 25-g silica gel column, 0-5% EtOAc/Heptane)