反应详情

To a solution of 0.17 g of 9-borabicyclo[3.3.1]nonane in 35 ml of dry tetrahydrofuran, 0.50 g of 3β-(prop-2-enoxy)-17β-(3-furyl)-5β-androstan-14β-ol in 10 ml of tetrahydrofuran were added under nitrogen atmosphere, at room temperature. The solution was stirred for 6 hrs then 0.75 ml of ethanol, 0.25 ml of sodium hydroxide 6N and 0.50 ml of hydrogen peroxide 30% were added. The mixture was stirred at 50° C. for an hr, quenched with a solution of 0.76 g of potassium carbonate in 20 ml of water and the organic solvent distilled under reduced pressure. The residue was extracted with methylene chloride, the organic solution was dried over anhydrous sodium sulfate and evaporated to dryness under reduced pressure. The residue was purified by flash-chromatography (SiO2) using n-hexane/ethyl acetate 70/30 as eluant to give 0.40 g of 3β-(3-hydroxypropoxy)-17β-(3-furyl)-5β-androstan-14β-ol as a white amorphous solid.

1. stirringThe mixture was stirred at 50° C. for an hr
2. customquenched with a solution of 0.76 g of potassium carbonate in 20 ml of water
3. distillationthe organic solvent distilled under reduced pressure
4. extractionThe residue was extracted with methylene chloride
5. dry with materialthe organic solution was dried over anhydrous sodium sulfate
6. customevaporated to dryness under reduced pressure
7. customThe residue was purified by flash-chromatography (SiO2)