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    • 3. 发明申请
    • PROCESS FOR PRODUCING DERIVATIVES OF 4a,5,9,10,11,12,-HEXAHYDRO-6H-BENZOFURO[3a,3,2-ef][2]BENZAZEPINE
    • PRODUCING 4A的衍生物的方法,5,9,10,11,12,六氢-6H-苯并呋喃[3a中,3,2-EF] [2]苯并吖庚因
    • WO1996012692A1
    • 1996-05-02
    • PCT/AT1995000208
    • 1995-10-23
    • WALDHEIM PHARMAZEUTIKA GESELLSCHAFT M.B.H.CZOLLNER, LaszloFRÖHLICH, JohannesJORDIS, UlrichKÜENBURG, Bernhard
    • WALDHEIM PHARMAZEUTIKA GESELLSCHAFT M.B.H.
    • C07B53/00
    • C07D491/10
    • The proposal is for a process for producing derivatives of 4a,5,9,10,11,12,-hexahydro-6H-benzofuro[3,2-ef][2]benzazepine facilitating in particular the production of galanthamine (6) via the novel bromine-N-demethyl galanthamine (4) and the novel bromine galanthamine (5). In this process, the compound (2) is oxidatively cyclised into the compound (3). The compound (3) is diastereo-selectively reduced by L-selectrides to the novel bromine-N-demethyl galanthamine (4) without the formation of detectable quantities of epibromine-N-demethyl galanthamine. The novel bromine galanthamine (5) is obtained by methylation, from which by separation of bromine (+/-) galanthamine (6) is produced. Pure enantiomers can be demonstrated by precipitation as a salt of a chiral acid (especially a tartrate). The process shown in the reaction diagram below gives high yields and pure products at all stages and can thus be conducted on the industrial scale.
    • 一种方法,提出了一种用于经由制造4a中,5,9,10,11,12,六氢-6H-苯并呋喃并[3,2-EF] [2]苯并吖庚因,特别是,加兰他敏的制造(6)的衍生物的 新溴-N-脱甲基雪花胺(4)和新Bromgalanthamin(5)是允许的。 在该方法中,化合物(2)通过氧化化合物(3)的环化。 化合物(3)与新的与L-selectrides减少非对映选择性而没有可检测量的Epi溴-N-脱甲基雪花胺的形成溴-N-脱甲基雪花胺(4)。 新Bromgalanthamin(5)由甲基化获得,从其通过(6)制备的溴(+/-)雪花胺的切割。 通过沉淀手性酸的盐(特别是作为酒石酸盐),对映异构体可以以纯的形式制备。 的再现下面以高产率和纯产品的各个阶段的反应方案的结果,以便它可以在工业规模下进行的处理。