反应详情

温度

100 °C

A mixture of 5-iodo-4′-methyl-biphenyl-3-carboxylic acid methyl ester (2.0 g, 5.7 mmol), 2-ethyl-imidazole (1.1 g, 11.4 mmol), (L)-proline (0.26 g, 2.28 mmol), CuI (0.22 g, 1.14 mmol) and K2CO3 (1.57 g, 11.4 mmol) in DMSO (30 mL) was flushed with N2, then heated to 100° C. overnight. After cooling to room temperature, the reaction mixture was extracted with EtOAc. The combined organic layers were separated, washed with water, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography to afford 5-(2-ethyl-imidazol-1-yl)-4′-methyl-biphenyl-3-carboxylic acid methyl ester as a white solid (750 mg, 41.1%).

1. customwas flushed with N2
2. temperatureAfter cooling to room temperature
3. extractionthe reaction mixture was extracted with EtOAc
4. customThe combined organic layers were separated
5. washwashed with water
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe residue was purified by flash chromatography