申请人:Prochem Establishment
公开号:US04255331A1
公开(公告)日:1981-03-10
The invention relates to 3-acetoxy-9.beta.,11.beta.,-epoxy-pregna-1,3,5-trienes and the corresponding 3,5-dienes having the general formula 1, in which on the 1,2-position a double bond may be present and in which R.sub.3 is a hydrogen or halogen atom or a hyroxy-, acyloxy-, aroyloxy or sulphonyloxygroup; R.sub.1 and/or R.sub.2 are a hydrogen atom or a hydroxy-, aroyloxy-, acyloxy- or alkylgroup containing 1-6 carbon atoms, or in which R.sub.1 and R.sub.2 form together a 16,17-isopropylidene-dioxy group, a process for the preparation of this compounds by reacting the corresponding .DELTA..sup.1,4 -3-keto-pregnadienes or .DELTA..sup.4 -3-keto-pregnenes with isopropenylacetate and a process for their direct conversion into the corresponding 6.alpha.-halogen-substituted-pregna-1,4-diene-3-ones and pregn-4-ene-3-ones with the general formula 2 by reacting them with a positive-halogen producing agent.
本发明涉及具有一般式1的3-乙酰氧基-9β、11β-环氧孕-1,3,5-三烯和相应的3,5-二烯,其中1,2位上可能存在双键,R.sub.3是氢或卤素原子或羟基、酰氧基、芳酰氧基或磺酰氧基基团;R.sub.1和/或R.sub.2是含有1-6个碳原子的氢原子或羟基、芳酰氧基、酰氧基或烷基基团,或者R.sub.1和R.sub.2一起形成16,17-异丙基亚甲基二氧基基团。本发明还涉及将相应的Δ1,4-3-酮-孕二烯或Δ4-3-酮-孕烯与异丙醋酸异丙烯酯反应制备这些化合物的方法,以及将它们与正卤素产生剂反应直接转化为具有一般式2的相应的6α-卤代孕-1,4-二烯-3-酮和孕-4-烯-3-酮的方法。