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
  • 申请号: US09147675
    申请日: 1999-02-11
  • 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
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
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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