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    • 5. 发明授权
    • Process for the preparation of nucleosides
    • 制备核苷的方法
    • US5268464A
    • 1993-12-07
    • US31455
    • 1993-03-15
    • Wolfgang K. D. Brill
    • Wolfgang K. D. Brill
    • C07H1/00C07H19/04C07H19/073C07H19/173C07H21/00C07H19/056C07H21/02
    • C07H19/04C07H21/00Y02P20/55
    • A process for the preparation of natural or synthetic nucleosides, nucleoside analogs or oligonucleotides from at least two such nucleosides and/or nucleoside analogs whose basic molecule contains an unsubstituted or substituted radical of a nucleic base B and a protected hydroxyl group of formula R.sub.1 --O--, wherein R.sub.1 is a protective group, or which are linked to the oxygen atom of a hydroxyl group direct or to a solid support through a linking group, from nucleoside monomers or from oligonucleotides to the basic molecule of which, in addition to said radicals, a group of formula I, Ia or Ib ##STR1## is attached, by converting the group of formula I, Ia or Ib into a hydroxyl group --OH by reacting the nucleosides or oligonucleotides, in the absence or presence of an inert organic solvent, with an excess of an aliphatic, cycloaliphatic araliphatic or aromatic alcohol containing 1 to 30 carbon atoms, a polyol containing 2 to 50 carbon atoms or a polymeric polyol, in the presence of at least a catalytic amount of an inorganic base or of an organic nitrogen base, which base has a pK value of 4 to 10.
    • 从至少两种这样的核苷和/或核苷类似物制备天然或合成核苷,核苷类似物或寡核苷酸的方法,其碱基分子含有核酸B的未取代或取代的基团和式R1-O的被保护的羟基 - 其中R 1是保护基,或者通过连接基团直接连接到羟基的氧原子或连接到固体支持物上,从核苷单体或从寡核苷酸到除了所述基团之外的碱基分子 通过将式I,Ia或Ib的基团通过将式I,Ia或Ib的基团转化为羟基-OH而通过将式I,Ia或Ib的基团转化成羟基-OH 在不存在或存在惰性有机溶剂的条件下使过量的含有1至30个碳原子的脂肪族,脂环族芳脂族或芳族醇,含有2-50个碳原子的多元醇或聚合物聚 在至少一种催化量的无机碱或有机氮碱的存在下,该碱的pK值为4-10。