Dimethylformamide → 16beta-Ethyl-17beta-(3,3-dimethylbutyryl)oxyacetoxy-4-estren-3-one

関与物質

反応手順

In 10 ml of acetone is dissolved 1.16 g of 3,3-dimethylbutyric acid, and 5.0 ml of 2N-NaOH is added, followed by addition of 1.15 g of 16β-ethyl-17β-bromoacetoxy-4-estren-3-one and 20 ml of DMF. The mixture is refluxed for 5 hours, and thereafter treated in the same manner as Example 26. The reaction mixture is chromatographed on a silica gel column. Following passage of 200 ml of n-hexanediisopropyl ether (3:7), elution is carried out with a 1:1 mixture of the same solvents. The eluate is evaporated under reduced pressure to remove the solvent, giving 0.76 g of the above-identified compound as a colorless viscous oil.

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