| 发明名称 |
Preparation process for 20-keto-21(S) hydroxy steroid compounds and intermediates |
| 摘要 |
An improved process for the preparation of 20-keto-21(S)-hydroxy steroids of the Formula <IMAGE> I wherein R1 is alkyl of 1 to 3 carbon atoms, R2 is alkyl of 1 to 12 carbon atoms, and R3 is alkyl of 1 to 4 carbon atoms and novel intermediates therefrom.
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| 申请公布号 |
US5384419(A) |
申请公布日期 |
1995.01.24 |
| 申请号 |
US19930071199 |
申请日期 |
1993.06.02 |
| 申请人 |
ROUSSEL-UCLAF |
发明人 |
BUENDIA, JEAN;GODARD, JEAN-YVES;MACKIEWICZ, PHILIPPE;RICHARD, CHRISTIAN |
| 分类号 |
C07J9/00;C07J31/00;C07J75/00;C12P41/00;(IPC1-7):C07J5/00 |
主分类号 |
C07J9/00 |
| 代理机构 |
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