Sulfuric Acid → (3beta,5beta,15alpha,16alpha)-15,16-Dihydro-3,5-dihydroxy-3'H-cycloprop(15,16)androsta-6,15-dien-17-one

Beteiligte Stoffe

Reaktionsschritte

134 g of 5-hydroxy-15β,16β-methylene-3β-pivaloyloxy-5β-androst-6-en-17-one is dissolved in 1,340 ml of tetrahydrofuran and 670 ml of methanol and combined in succession with 40 g of pulverized potassium hyroxide and 13 g of sodium perchlorate. After 2.5 hours, the mixture is stirred into 8 l of water, neutralized with 20% sulfuric acid, and the thus-precipitated solid is filtered off. After dissolving the solid in methylene chloride and drying same with sodium sulfate, it is concentrated under vacuum. By trituration of the resultant solid with ethyl acetate, 99.8 g of 3β,5-dihydroxy-15β,16β-methylene-5β-androst-6-en-17-one is produced, mp 198° C.

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