反应详情

1.1 g of p-toluenesulphonic acid are added to 49.9 g (0.32 mol) of ethyl cyclopropylcarbonylacetate in 200 ml of dry toluene and the mixture is saturated with ammonia gas at room temperature with stirring. After allowing to stand overnight, the mixture is heated under reflux for 8 h in a water separator, ammonia gas being continuously introduced. The mixture is allowed to cool overnight and is filtered, and the toluene solution is concentrated in vacuo and distilled from unreacted starting material in a high vacuum up to 65° C. The substance is subsequently found in the residue.

1. temperaturethe mixture is heated
2. additioncontinuously introduced
3. temperatureto cool overnight
4. filtrationis filtered
5. concentrationthe toluene solution is concentrated in vacuo
6. distillationdistilled
7. customup to 65° C