反应详情

温度

110 °C

Methyl 3-amino-6-bromo-pyrazine-2-carboxylate (625.1 mg, 2.694 mmol), [4-(dimethylcarbamoyl)phenyl]boronic acid (520 mg, 2.694 mmol), sodium carbonate (571.1 mg, 5.388 mmol) and palladium; triphenylphosphane (311.3 mg, 0.2694 mmol) in a mixture of acetonitrile (3 mL) and water (3 mL) was heated at 110° C. in the microwave for 30 minutes. The reaction was diluted with EtOAc and water and the layers separated. The aqueous later was extracted further with EtOAc (2×) and the combined organics dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by column chromatography (ISCO Companion™, 40 g column, 0-100% EtOAc/Petroleum ether) to give the desired product as a yellow solid (375 mg, 46% Yield). 1H NMR (400.0 MHz, DMSO) d 3.02 (3H, s), 3.15 (3H, s), 4.04 (3H, s), 7.54 (2H, m), 7.97 (2H, m), 8.71 (1H, s) ppm; MS (ES+) 301.13

1. customthe layers separated
2. extractionThe aqueous later was extracted further with EtOAc (2×)
3. dry with materialthe combined organics dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified by column chromatography (ISCO Companion™, 40 g column, 0-100% EtOAc/Petroleum ether)