反应详情

Ethanolic sodium ethoxide, previously prepared from 2.9 g of metallic sodium and 100 ml of ethanol, was added to diethyl methyl-malonate, 50 g, and the mixture was refluxed for 30 min. then cooled to 5°. A solution of 2-methylenequinuclidin-3-one, 39.4 g, in ethanol, 50 ml, was then added dropwise and with stirring. After 16 hrs. at room temperature, the resulting solution was neutralized with acetic acid then subjected to evaporation at reduced pressure. Water, 100 ml was added and the mixture was extracted with chloroform. Evaporation of this solvent gave diethyl (3-oxo quinuclidin-2-yl)-methyl-methylmalonate, 72 g (81%), m.p., 58.4° (from petroleum ether).

1. temperaturethe mixture was refluxed for 30 min.
2. temperaturethen cooled to 5°
3. customat room temperature
4. customthen subjected to evaporation at reduced pressure
5. additionWater, 100 ml was added
6. extractionthe mixture was extracted with chloroform
7. customEvaporation of this solvent