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    • 93. 发明授权
    • Synthons for oligonucleotide synthesis
    • 合成寡核苷酸合成
    • US6117993A
    • 2000-09-12
    • US15472
    • 1998-01-29
    • Radhakrishnan P. IyerDong YuMao-Jun GuoSudhir Agrawal
    • Radhakrishnan P. IyerDong YuMao-Jun GuoSudhir Agrawal
    • C07H19/11C07H19/10C07H19/16C07H19/20C07H19/213C07H21/00C07H19/04
    • C07H19/10C07H19/16C07H19/20C07H21/00
    • The invention provides new reagents and processes for synthesizing oligonucleotides, including stereoselective oligonucleotide synthesis. In a first aspect, the invention provides novel monomer synthons for the synthesis of oligonucleotides. Monomer synthons according to this aspect of the invention are useful in the synthesis of oligonucleotides and can be used in place of the well known beta-cyanoethyl phosphoramidite monomer synthon in the phosphoramidite synthesis procedure. Certain monomer synthons according to this aspect of the invention are useful in this procedure for producing oligonucleotides having defined stereochemistry.In a second aspect, the invention provides processes for synthesizing monomer synthons according to the invention, including diastereomerically enriched or purified monomer synthons. In the processes according to this aspect of the invention, the chemical reactions are stereoretentive so that the products of each reaction retain the same stereoconfiguration as their precursor reagent.In a third aspect, the invention provides processes for synthesizing oligonucleotides using the well known phosphoramidite approach. In the processes according to this aspect of the invention, any of the monomer synthons according to the invention is used in place of the conventional beta-cyanoethyl phosphoramidite.
    • 本发明提供用于合成寡核苷酸的新试剂和方法,包括立体选择性寡核苷酸合成。 在第一方面,本发明提供了用于合成寡核苷酸的新型单体合成子。 根据本发明该方面的单体合成子可用于寡核苷酸的合成,并可用于代替在亚磷酰胺合成方法中众所周知的β-氰乙基亚磷酰胺单体合成子。 根据本发明该方面的某些单体合成子可用于制备具有确定的立体化学的寡核苷酸的该方法中。 在第二方面,本发明提供了合成根据本发明的单体合成子的方法,包括非对映体富集或纯化的单体合成子。 在根据本发明的这个方面的方法中,化学反应是立体反应性的,使得每个反应的产物保持与其前体试剂相同的立体构型。 在第三方面,本发明提供使用公知的亚磷酰胺方法合成寡核苷酸的方法。 在根据本发明的这个方面的方法中,使用根据本发明的任何单体合成物代替常规的β-氰基乙基亚磷酰胺。
    • 98. 发明授权
    • Method of tritium labeling oligonucleotide
    • 氚标记寡核苷酸的方法
    • US5847104A
    • 1998-12-08
    • US447203
    • 1995-05-22
    • Weitan TanRadhakrishnan P. IyerZhiwei JiangDong YuSudhir Agrawal
    • Weitan TanRadhakrishnan P. IyerZhiwei JiangDong YuSudhir Agrawal
    • A61K51/04C07H21/00C07H21/02C07H21/04
    • A61K51/0491C07H21/00
    • The present invention comprises a novel method of incorporating a tritium label at one or more predetermined sites within an oligonucleotide. In particular, the method comprises contacting a nascent, support-bound oligonucleotide having a free 5' hydroxyl group with a suitable oxidizing agent to oxidize the alcohol to an aldehyde, followed by reducing the aldehyde thereby formed with a suitable tritium labeled reducing agent such as �.sup.3 H!NaBH.sub.4 to yield the 5' terminal alcohol with a 5' tritium label. Normal automated synthesis can then be continued to yield the oligonucleotide of desired length having the tritium label in the desired location. The oligonucleotides thereby produced have higher specific activity than those previously known in the art. According, in a second aspect, the present invention provides oligonucleotides having high specific acitivity. The oligonucleotides of the present invention are useful for determining the pharmacokinetics and biodistribution of their non-radiolabeled counterparts, both in vitro and in vivo.
    • 本发明包括在寡核苷酸内的一个或多个预定位点掺入氚标记的新方法。 特别地,该方法包括将具有游离的5'羟基的新生载体结合的寡核苷酸与合适的氧化剂接触以将醇氧化成醛,然后用合适的氚标记还原剂形成还原醛, [3H] NaBH 4,得到具有5'氚标记的5'末端醇。 然后可以继续进行正常的自动化合成,得到所需长度的寡核苷酸,其中所述氚标记具有所需位置。 由此产生的寡核苷酸比本领域已知的寡核苷酸具有更高的比活性。 根据第二方面,本发明提供具有高比活度的寡核苷酸。 本发明的寡核苷酸可用于在体外和体内测定其非放射性标记的对应物的药代动力学和生物分布。