发明授权
US06787533B1 Process for R-epimer enrichment of 16,17-acetal derivatives of 21-acyloxy pregna,4-dien-11.beta., 16.alpha., 17.alpha.-triol-3,20-dione derivatives
有权
21-酰氧基前体,4-二烯-11β,16α,17α-三醇-3,20-二酮衍生物的16,17-乙缩醛衍生物的R-差向异构体富集方法
- 专利标题: Process for R-epimer enrichment of 16,17-acetal derivatives of 21-acyloxy pregna,4-dien-11.beta., 16.alpha., 17.alpha.-triol-3,20-dione derivatives
- 专利标题(中): 21-酰氧基前体,4-二烯-11β,16α,17α-三醇-3,20-二酮衍生物的16,17-乙缩醛衍生物的R-差向异构体富集方法
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申请号: US09147675申请日: 1999-02-11
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公开(公告)号: US06787533B1公开(公告)日: 2004-09-07
- 发明人: Beate Gutterer
- 申请人: Beate Gutterer
- 优先权: DE19635498 19960903
- 主分类号: A61K3158
- IPC分类号: A61K3158
摘要:
R-epimer enrichment of 16,17-acetal derivatives of 21-acyloxy pregna-1,4-dien-11beta,16alpha,17alpha-triol-3,20-dione derivatives is effected by fractional crystallization.
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