反应详情

In 10 ml of tetrahydrofuran was dissolved 350 mg of 3β-benzoyloxy-21,21-dimethoxy-20-methyl-1α-(N-methylcarbamoyl)oxypregn-6-en-5α-ol, followed by addition of 50 mg of dichloroacetic acid. The mixture was refluxed in an atmosphere of argon gas for 12 hours. The reaction mixture was then worked up in the same manner as Example 124 to give 120 mg of 3β-benzoyloxy-21,21-dimethoxy-20-methyl-1α-(N-methylcarbamoyl)oxypregna-5,7-diene showing the following physical properties.

1. temperatureThe mixture was refluxed in an atmosphere of argon gas for 12 hours