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Solid-phase synthesis of 5'-phosphorylated oligodeoxynucleotides.

A Kondo, Y Uchimura, F Kimizuka

    Nucleic Acids Symposium Series
    |January 1, 1985
    PubMed
    Summary
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    Morpholino groups protect phosphate during oligodeoxynucleotide phosphorylation. These protecting groups can be selectively removed after phosphotriester and phosphoramidite intermediate formation.

    Area of Science:

    • Chemical Synthesis
    • Oligonucleotide Chemistry
    • Organic Chemistry

    Background:

    • Phosphorylation of 5'-terminal ends of oligodeoxynucleotides is crucial for various applications.
    • Protecting group strategies are essential to control reactivity during oligonucleotide synthesis.
    • Existing methods may face challenges in selectivity or efficiency.

    Purpose of the Study:

    • To develop a novel method for protecting phosphate groups during oligodeoxynucleotide phosphorylation.
    • To investigate the utility of morpholino groups as selective protecting agents.
    • To enable efficient synthesis of modified oligodeoxynucleotides.

    Main Methods:

    • Utilized morpholino groups to shield the phosphate moiety during phosphotriester and phosphoramidite coupling reactions.

    Related Experiment Videos

  • Performed phosphorylation of the 5'-terminal ends of oligodeoxynucleotides.
  • Investigated selective removal conditions for the morpholino protecting groups.

    • Main Results:

    • Morpholino groups effectively protected the phosphate during phosphorylation steps.
    • Selective deprotection of the morpholino groups was achieved without compromising the oligonucleotide structure.
    • The method facilitated controlled phosphorylation of oligodeoxynucleotide termini.

    Conclusions:

    • Morpholino groups represent a viable and selective protecting strategy for phosphate during oligodeoxynucleotide phosphorylation.
    • This approach offers enhanced control in the synthesis of complex oligonucleotide structures.
    • The selective removal of morpholino groups simplifies downstream processing and purification.