反应详情

A mixture of 4-(methylthio)benzaldehyde (3.00 g, 19.7 mmol), 6-bromo-4-hydroxyquinolin-2(1H)-one (4.72 g, 19.7 mmol, Intermediate 45: step a), diethyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (5.23 g, 20.7 mmol), and pyridine (100 mL) was stirred at 80° C. for 4 hours and then at room temperature overnight. The reaction was cooled and the formed precipitate was filtered, washed with Et2O (100 mL), and dried to afford the title compound as a white solid.

1. customat room temperature
2. customovernight
3. temperatureThe reaction was cooled
4. filtrationthe formed precipitate was filtered
5. washwashed with Et2O (100 mL)
6. customdried