20-(1,3-Dioxolan-2-yl)-1alpha-acetoxy-3beta-(methoxymethyl)oxypregna-5,7-diene → 1alpha-Acetoxy-3beta-(methoxymethyl)oxypregna-5,7-diene-20carbaldehyde

Participants

Reaction Steps

In 10 ml of acetone was dissolved 100 mg of 20-(1,3-dioxolan-2-yl)-1α-acetoxy-3β-(methoxymethyl)oxypregna-5,7-diene, followed by addition of one drop of 70% perchloric acid, and the mixture was refluxed in an atmosphere of argon gas for 2 hours. The reaction mixture was then worked up in the same manner as Example 156 to give 40 mg of 1α-acetoxy-3β-(methoxymethyl)oxypregna-5,7-diene-20-carbaldehyde showing the following physical properties.

Provenance & Evidence