反应详情

To 0.52 g (3.2 mmol) of the aldehyde from step (a) and 0.26 g (4 mmol) malononitrile in 30 ml ethanol was added 2 drops piperidine and the reaction mixture was refluxed for 40 minutes, cooled, filtered and washed with ethanol to yield 0.61 g (90% yield) of an orange solid, m.p. 160° C.

1. temperaturethe reaction mixture was refluxed for 40 minutes
2. temperaturecooled
3. filtrationfiltered
4. washwashed with ethanol