Method for preparing 4-[17beta-methoxy-17alpha-methoxymethyl-3-oxestra-4,9-dien-11beta-yl]benzaldehyde (E)-oxime (asoprisnil)
申请人:Grawe Detlef
公开号:US20090054387A1
公开(公告)日:2009-02-26
The present invention relates to a method for the reliable and reproducible preparation of 4-[17β-methoxy-17α-methoxymethyl-3-oxoestra-4,9-dien-11β-yl]benzaldehyde (E)-oxime (asoprisnil) on the pilot and manufacturing scale. Asoprisnil, which is prepared by this method, is distinguished by a very good physical stability and is therefore particularly suitable for the manufacture of solid pharmaceutical forms (tablets, coated tablets, etc.).