Hydrochloric Acid → 11-[3,17beta-Dihydroxyestra-1,3,5(10)-trien-7alpha-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoic acid

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Reaction Conditions

Reaction Steps

Ethyl 11-[3,17β-dihydroxyestra-1,3,5(10)-trien-7α-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoate (660 mg, 1.03 mmol) was dissolved in a mixed solvent of ethanol (10 ml) and water (2.0 ml). To this solution, NaOH (820 mg, 20.5 mmol) was added, and the resulting mixture was heated for 4 hours at 60° C. After cooling, 2N aqueous hydrochloric acid was added to the reaction mixture, which was then extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and then filtered. After concentration under reduced pressure, the resulting residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=1/1) to give 11-[3,17β-dihydroxyestra-1,3,5(10)-trien-7α-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoic acid (613 mg, Yield 97%).

Provenance & Evidence