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.).
本发明涉及一种可靠且可重复制备4-[17β-甲氧基-17α-甲氧基甲基-3-氧代雌-4,9-二烯-11β-基]
苯甲醛(E)-
肟(asoprisnil)的中试和生产规模方法。通过该方法制备的asoprisnil具有非常好的物理稳定性,因此特别适用于制造固体制剂(片剂,包衣片剂等)。