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Efficient process technologies for the preparation of oligonucleotides

W Pieken1

  • 1NeXstar Pharmaceuticals Inc., Boulder, CO 80301, USA.

Ciba Foundation Symposium
|January 1, 1997
PubMed
Summary

New methods efficiently prepare 2'-substituted nucleoside monomers and oligonucleotides. These advances utilize novel intramolecular reactions and scalable solution-phase synthesis for improved nucleic acid production.

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Area of Science:

  • Organic Chemistry
  • Nucleoside Chemistry
  • Oligonucleotide Synthesis

Background:

  • Efficient preparation of modified nucleosides and oligonucleotides is crucial for various biotechnological applications.
  • Existing methods for 2 -substitution of nucleosides can be complex and lack scalability.
  • Large-scale oligonucleotide synthesis requires robust and efficient coupling and purification strategies.

Purpose of the Study:

  • To introduce efficient process technologies for 2 -substituted nucleoside monomers.
  • To develop a novel method for the preparation of 2 -substituted uridines.
  • To present a new process for large-scale oligonucleotide synthesis.

Main Methods:

  • Utilized 2,2 -anhydrouridine with its 3 -hydroxyl group as a tether for intramolecular nucleophilic substitution at the 2 -position.
  • Introduced alcohol precursors for 2 -alkoxy substituents and nucleophiles for 2 -amino substituents, including novel O-substituted 2 -hydroxylaminouridines.
  • Developed a solution-phase coupling process for monomers to growing oligonucleotide chains, followed by resin-based isolation and release.

Main Results:

  • Successfully prepared 2 -substituted uridines with alkoxy and novel amino substituents.
  • Demonstrated facile intramolecular introduction of nucleophiles to the 2 -position of uridine.
  • Established a scalable process for oligonucleotide synthesis with selective isolation of coupling products.

Conclusions:

  • The novel tethering strategy provides efficient access to diverse 2 -substituted nucleoside monomers.
  • The developed process technologies enhance the preparation of modified nucleosides and oligonucleotides.
  • The scalable oligonucleotide synthesis method offers improved efficiency for producing nucleic acid chains.

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