反应详情

Added to 36.0 g of 3-carboethoxy-1-ethylpiperidine-2,4-dione (Referential Example 35) was 300 ml of a 10% aqueous solution of hydrochloric acid. The resultant mixture was refluxed for 40 minutes. After allowing the reaction mixture to cool down, it was extracted with chloroform. The chloroform layer was washed with water, dried and then concentrated, thereby obtaining 16.6 g of 1-ethylpiperidine-2,4-dione as a light yellowish oily substance (yield: 70%).

1. temperatureto cool down
2. extractionit was extracted with chloroform
3. washThe chloroform layer was washed with water
4. customdried
5. concentrationconcentrated