21―アシルオキシプレグナ―1,4―ジエン―11β,16α,17α―トリオール―3,20―ジオン誘導体の16,17―アセタール誘導体のR―エピマーの割合を増大させるための方法

Title:

Document Type and Number:

Japanese Patent JP3807509

Kind Code:

B2

Abstract:

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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JP4016070	Production of (11β, 16β) -21- (Acetyloxy) -11-Hydroxy-2'-Methyl-5'H-Pregna-1,4-dieno [17,16-D] Oxazole-3,20-dione
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Inventors:

Hermann Am Schler
Dieter Frocker Tsi
Beate Goodterer

Application Number:

JP51221398A

Publication Date:

August 09, 2006

Filing Date:

August 29, 1997

Export Citation:

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Assignee:

ALTANA Pharma AG

International Classes:

C07J71/00

Domestic Patent References:

JP63093795A
JP6505233A

Foreign References:

WO1995024416A1
WO1992011280A1

Attorney, Agent or Firm:

Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Reinhard Einsel

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