反应详情

温度

100 °C

To a dark solution of 6-bromo-4-hydroxyquinolin-2(1H)-one (3.92 g, 16.31 mmol, Intermediate 45: step a) and pyrimidine-5-carbaldehyde (1.94 g, 17.95 mmol) in pyridine (29 mL) was added diethyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (4.13 g, 16.31 mol). The resulting mixture was warmed with stirring in a 100° C. oil bath for a period of 5 hours. After cooling to room temperature, the mixture was diluted with ethanol. The tan precipitate was isolated by filtration, rinsing further with EtOH then acetonitrile and dried to provide the title compound that was carried to the next step without further purification.

1. temperatureThe resulting mixture was warmed
2. temperatureAfter cooling to room temperature
3. customThe tan precipitate was isolated by filtration
4. washrinsing further with EtOH
5. dry with materialacetonitrile and dried