Process for the synthesis of diricinoleyphosphatidylcholine
    1.
    发明授权
    Process for the synthesis of diricinoleyphosphatidylcholine 失效
    合成二抗磷脂酰胆碱的方法

    公开(公告)号:US06297391B1

    公开(公告)日:2001-10-02

    申请号:US09366744

    申请日:1999-08-04

    CPC classification number: C12P7/6481 C07F9/10 Y02P20/55

    Abstract: Diricinoleylphosphatidylcholine (I) in an optically active form is obtained with good yields and a high purity by means of a process which comprises: a) esterifying the terminal carboxylic group of ricinoleic acid (III) with an alcohol having from 1 to 4 carbon atoms to give the corresponding ester having formula (IV); b) protecting the hydroxylic group of the ester of ricinoleic acid (IV) with a protecting group removable under bland operating conditions and isolating the ester of ricinoleic acid of which the hydroxylic group (V) is protected; c) hydrolyzing the ester of ricinoleic acid of which the hydroxylic group (V) is protected and isolating the ricinoleic acid of which the hydroxylic group (VI) is protected; d) acylating L-&agr;-glycerophosphatidylcholine (II) with an imidazolic or triazolic derivative of the compound having formula (VI) and isolating the diricinoleylphosphatidylcholine of which the hydroxylic group (VII) is protected; e) removing the protecting group from the hydroxylic group of the compound having formula (VII); and finally f) recovering and purifying the compound having formula (I) by means of chromatography.

    Abstract translation: 通过以下方法获得具有光学活性形式的二亚油酰基磷脂酰胆碱(I),具有良好的收率和高纯度,该方法包括:a)用具有1至4个碳原子的醇将蓖麻油酸(III)的末端羧基酯化至 得到具有式(IV)的相应酯; b)用温和的操作条件下可除去的保护基保护蓖麻油酸(IV)的酯的羟基,并将其中羟基(Ⅴ)的蓖麻油酸酯 保护; c)水解羟基(V)被保护的蓖麻油酸酯,并分离保护羟基(Ⅵ)的蓖麻油酸; d)用咪唑单体酰化L-α-甘油磷脂酰胆碱(II) 或具有式(Ⅵ)的化合物的三唑衍生物,并分离保护羟基(Ⅶ)的二亚油酰基磷脂酰胆碱; e)从羟基中除去保护基 具有式(VII)的化合物的式 最后通过色谱法回收和纯化具有式(I)的化合物。

    Method of preparation of transgenic plants resistant to viral infections
and so obtained plants
    5.
    发明授权
    Method of preparation of transgenic plants resistant to viral infections and so obtained plants 失效
    制备抗病毒感染的转基因植物和所得植物的方法

    公开(公告)号:US5959181A

    公开(公告)日:1999-09-28

    申请号:US854170

    申请日:1997-05-09

    CPC classification number: C12N15/8283

    Abstract: The present invention relates to a method of preparation of transgenic plants resistant to viral infections by introducing into the genoma of a host plant an antisense gene construct constituted by: the domain F of the subgenomic promoter of a viral RNA; a leader sequence of a viral ORF, downstream from said subgenomic promoter; the gene encoding a viral coat protein, downstream from said leader sequence; and the 3'-terminal region of a viral RNA, downstream from said gene. The present invention also relates to a recombinant vector comprising a promoter functional in a host plant, and, operably linked to this promoter, the antisense gene construct of the present invention.

    Abstract translation: 本发明涉及通过向宿主植物的基因体中引入由以下构成的反义基因构建体来制备对病毒感染有抗性的转基因植物的方法:由病毒RNA的亚基因组启动子的结构域F; 来自所述亚基因组启动子的病毒ORF的前导序列; 编码病毒外壳蛋白的基因,在所述前导序列的下游; 和病毒RNA的3'末端区域。 本发明还涉及包含在宿主植物中起作用的启动子,并且与该启动子可操作地连接的本发明的反义基因构建体的重组载体。

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