反应详情

In 35 ml of acetone is dissolved 1.0 ml of 4-methylvaleric acid, and 4.6 ml of 2N-NaOH and then 1.9 g of 16β-ethyl-17β-bromoacetoxy-4-estren-3-one are added to the above solution. The mixture is refluxed for 6 hours. The acetone is distilled off under reduced pressure and 10 ml of water is added to the residue, followed by extraction with 100 ml of ethyl acetate. The organic layer is separated, washed with water and saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate. The solvent is then distilled off and the residue is subjected to column chromatography, elution being carried out with 600 ml of diisopropyl ether-n-hexane (1:1). The eluate is evaporated under reduced pressure to remove the solvent, giving 1.3 g of the above-identified compound as a colorless viscous oil.

1. temperatureThe mixture is refluxed for 6 hours
2. distillationThe acetone is distilled off under reduced pressure and 10 ml of water
3. additionis added to the residue
4. extractionfollowed by extraction with 100 ml of ethyl acetate
5. customThe organic layer is separated
6. washwashed with water and saturated aqueous sodium chloride solution
7. dry with materialdried over anhydrous sodium sulfate
8. distillationThe solvent is then distilled off
9. washthe residue is subjected to column chromatography, elution
10. customThe eluate is evaporated under reduced pressure
11. customto remove the solvent