反应详情

3-Bromo-4-hydroxy-5-methoxybenzylidene-malononitrile: To a mixture of 3-bromo-4-hydroxy-5-methoxybenzaldehyde (2.31 g, 10 mmol) and malononitrile (660, 10 mmol) in 20 mL of ethanol was added piperidine (0.5 mL, 0.5 mmol). The solution was stirred at room temperature overnight and precipitates were observed. The precipitates were collected by filtration and dried to yield 2.14 g (77%) of title compound as a red solid.

1. customprecipitates
2. filtrationThe precipitates were collected by filtration
3. customdried