反应详情

温度

0 °C

To a solution of methyl 5,6-dichloro-3-methylpyrazine-2-carboxylate (6.17 g, 27.9 mmol) in anhydrous methanol (100 ml, 2.47 mol) at 0° C. was added potassium carbonate (4.30 g, 31.1 mmol) slowly. The suspension was stirred at 0° C. for 30 minutes and warmed to ambient temperature in 1 h. The solid was filtered and the filtrate was concentrated to give crude methyl 6-chloro-5-methoxy-3-methylpyrazine-2-carboxylate (6.2 g, 103% yield) which was used in next step without further purification.

1. temperaturewarmed to ambient temperature in 1 h
2. filtrationThe solid was filtered
3. concentrationthe filtrate was concentrated