反应详情

A mixture of 2-amino-4,6-dimethylnicotinaldehyde (2.40 g., 16 mmole), ethyl nitroacetate (5.12 g., 32 mmole), piperidine (336 mg., 4 mmole) and ethanol (4 ml.) is heated under reflux with stirring for an hour. The mixture then is cooled, treated with petroleum ether, the solid removed by filtration and recrystallized from methanol yielding 1.55 g. (44%) of product, m.p. 270°-272° C. (dec.). Following recrystallization from the same solvent the product melts at 272°- 274° C. (dec.).

1. temperatureis heated
2. temperatureunder reflux
3. temperatureThe mixture then is cooled
4. customthe solid removed by filtration
5. customrecrystallized from methanol yielding 1.55 g
6. customrecrystallization from the same solvent the product melts at 272°- 274° C. (dec.)