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    • 1. 发明授权
    • PROCESS FOR THE PREPARATION OF RACEMIC CITALOPRAM AND/OR S- OR R-CITALOPRAM BY SEPARATION OF A MIXTURE OF R- AND S-CITALOPRAM
    • 通过分离R-和S-CITALOPRAM的混合物来制备RACEMIC CITALOPRAM和/或S-R或C-RING的方法
    • EP1412341B1
    • 2004-12-08
    • EP02742848.1
    • 2002-06-25
    • H. Lundbeck A/S
    • HUMBLE, Rikke, EvaCHRISTENSEN, Troels, VolsgaardROCK, Michael, HaroldNIELSEN, OlePETERSEN, HansDANCER, Robert
    • C07D307/87
    • C07D307/87
    • The invention relates to a process for the preparation of racemic citalopram free base or an acid addition salt thereof and/or R- or S-citalopram as the free base or an acid addition salt thereof by separation of a mixture of R- and S-citalopram with more than 50% of one of the enantiomers into a fraction consisting of racemic citalopram and/or a fraction of S-citalopram or R-citalopram characterized in that i) citalopram is precipitated from a solvent as the free base or as an acid addition salt thereof; ii) the precipitate formed is separated from the mother liquor; iia) if the precipitate is crystalline it is optionally recrystallised one or more times to form racemic citalopram, and then optionally converted into an acid addition salt thereof; iib) if the precipitate is not crystalline, steps i) and ii) are optionally repeated until a crystalline precipitate is obtained and the crystalline precipitate is recrystallised one or more times to form racemic citalopram, and then optionally converted into an acid addition salt thereof; iii) the mother liquor is optionally subjected to further purification and S-citalopram or R-citalopram is isolated from the mother liquor and optionally converted into an acid addition salt thereof.
    • 本发明涉及一种制备外消旋西酞普兰游离碱或其酸加成盐和/或作为游离碱或其酸加成盐的R-或S-西酞普兰的方法,其通过分离R-和S- 西酞普兰与超过50%的一种对映体进入由外消旋西酞普兰和/或一部分S-西酞普兰或R-西酞普兰组成的部分,其特征在于i)西酞普兰以游离碱或酸形式从溶剂中沉淀出来 其加成盐; ii)将形成的沉淀从母液中分离出来; 如果沉淀物是结晶的,则任选重结晶一次或多次以形成外消旋西酞普兰,然后任选转化为其酸加成盐; 如果沉淀物不是结晶的,则任选重复步骤i)和ii)直至获得结晶沉淀物,并将结晶沉淀物重结晶一次或多次以形成外消旋西酞普兰,然后任选转化成其酸加成盐; iii)任选地将母液进一步纯化,从母液中分离出S-西酞普兰或R-西酞普兰,并任选转化为其酸加成盐。