PREPARATION OF FLUMETHASONE AND ITS 17-CARBOXYL ANDROSTEN ANALOGUE
申请人:Hovione Limited .
公开号:EP1395603A1
公开(公告)日:2004-03-10
[EN] PREPARATION OF FLUMETHASONE AND ITS 17-CARBOXYL ANDROSTEN ANALOGUE<br/>[FR] PREPARATION DE FLUMETHASONE ET SON ANALOGUE 17-CARBOXYLE ANDROSTENE
申请人:HOVIONE LTD
公开号:WO2002100878A1
公开(公告)日:2002-12-19
A process for preparing flumethasone (6a,9a-diffluoro-11β,17a,21-trihydroxy-16a-methyl-pregna-1,4-diene-3,20-dione), fulmethasone 21-acetate or its 17-carboxyl androsten analogue which process comprises reacting a compound of formula (IIIa) with an electrophilic fluorination agent.