反应详情

To 540 ml of dimethyl sulfoxide were added 21.9 g of lithium chloride, 13.9 ml of pyridine and 9.3 ml of water, and the resulting mixture was gently heated under reflux. While refluxing the mixture, 100 ml of a solution of 54.0 g of 2,4,4-tricarbethoxy-cyclohexanone in dimethyl sulfoxide was dropwise added thereto over one hour. After a reaction at the same temperature as above for 2 hours, the mixture was cooled and poured into a mixture of ice water and ethyl acetate, and the organic layer was separated. The organic layer was washed with saturated aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. Purification of the residue by distillation under reduced pressure gave 13.5 g of 4-carbethoxycyclohexanone as a light yellow oily product.

1. temperaturethe resulting mixture was gently heated
2. temperatureunder reflux
3. additionwas dropwise added
4. customAfter a reaction at the same temperature as above for 2 hours
5. temperaturethe mixture was cooled
6. customthe organic layer was separated
7. washThe organic layer was washed with saturated aqueous solution of sodium chloride
8. dry with materialdried over anhydrous magnesium sulfate
9. distillationthe solvent was distilled off under reduced pressure
10. customPurification of the residue
11. distillationby distillation under reduced pressure