反应详情

465 g of methyl acetoacetate and then 458 g of ethyl bromide were added under nitrogen to 720 g of 30% sodium methylate solution in 1200 ml of methanol. The reaction mixture was subsequently boiled at reflux. After distillation of the methanol the residue was poured on to ice-water. It was then extracted with n-hexane and water. The organic phases were combined and dried. After evaporation of the solvent and distillation there were obtained 328 g (56.9%) of methyl 2-acetylbutyrate, b.p. 77°-79°/15 Torr.

1. temperatureat reflux
2. distillationAfter distillation of the methanol the residue
3. additionwas poured on to ice-water
4. extractionIt was then extracted with n-hexane and water
5. customdried
6. customAfter evaporation of the solvent
7. distillationdistillation there