反应详情

温度

170 °C

Combined 4-bromo-2-fluoro-5-methylbenzonitrile (4 g, 18.69 mmol) and dimethyl malonate (29.9 mL, 262 mmol) and purged with nitrogen. Potassium carbonate (3.87 g, 28.0 mmol), potassium hydrogencarbonate (2.81 g, 28.0 mmol), tri-tert-butylphosphonium tetrafluoroborate (0.119 g, 0.411 mmol), and bis(dibenzylidineacetone)palladium(0) (0.118 g, 0.206 mmol) were added. The reaction mixture was then heated in an oil bath at 170° C. After 3 hours, the reaction mixture was cooled, diluted with ethyl acetate, and filtered through Celite®. The filtrate was concentrated and the residue dissolved in EtOAc. The organic solution was washed with 1N aqueous sodium hydroxide (2×), twice with 10% aqueous sodium chloride, and then brine. The organic phase was dried over sodium sulfate, filtered, and concentrated in vacuo to give a residue which was purified by flash chromatography to give the title compound (1.67 g, 43%) as a clear colorless oil. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.30 (s, 3H) 3.67 (s, 2H) 3.72 (s, 3H) 7.10 (d, J=9.60 Hz, 1H) 7.42 (d, J=6.32 Hz, 1H).

1. temperaturethe reaction mixture was cooled
2. filtrationfiltered through Celite®
3. concentrationThe filtrate was concentrated
4. dissolutionthe residue dissolved in EtOAc
5. washThe organic solution was washed with 1N aqueous sodium hydroxide (2×), twice with 10% aqueous sodium chloride
6. dry with materialThe organic phase was dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customto give a residue which
10. customwas purified by flash chromatography