| 发明名称 |
PREPARATION PROCESS OF ( 22-R,S )-16ALPHA, 17ALPHA-BUTYLIDENDIOXY-11BETA-21-DIHYDOXY-1,4-PREGNADIENE-3,20- DIONE |
| 摘要 |
The present invention relates to a novel process for the manufacture of (22 R,S)-16 alpha , 17 alpha -butylidenedioxy-11 beta , 21-dihydroxypregna-1,4-diene-3,20 dione (I) by reacting 11 beta , 16 alpha , 17 alpha 21-tetrahydroxypregna-1,4-diene (II) with butanal, CH3-CH2-CH2-CHO, in acetonitrile in presence of p-toluenesulphonic acid as a catalyst. |
| 申请公布号 |
RO110947(B1) |
申请公布日期 |
1996.05.30 |
| 申请号 |
RO19460922004 |
申请日期 |
1990.09.27 |
| 申请人 |
AKTIEBOLAGET ASTRA, SODERTALJE |
发明人 |
HOFSTRAAT ROBERT GERRIT;RAIJMAKERS PETRUS HENDRICUS;VRIJHOF PIETER |
| 分类号 |
C07J5/00;C07J71/00;C07J75/00 |
主分类号 |
C07J5/00 |
| 代理机构 |
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