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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
Solid-Phase Synthesis of Phosphorothioate/Phosphonothioate and Phosphoramidate/Phosphonamidate Oligonucleotides
Ondřej Kostov1, Radek Liboska2, Ondřej Páv3
1Institute of Organic Chemistry and Biochemistry AS CR, v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic. kostov@uochb.cas.cz.
This study introduces a new solid-phase method for creating diverse modified oligonucleotides, including novel O-methylphosphonate variants. This advancement enables the synthesis of complex nucleic acid structures with unique chemical linkages.
Area of Science:
- Oligonucleotide synthesis
- Medicinal Chemistry
- Biochemistry
Background:
- Oligonucleotides are crucial in therapeutics and diagnostics.
- Existing synthesis methods have limitations in creating diverse chemical modifications.
- Novel linkages are needed to enhance stability and functionality of nucleic acids.
Purpose of the Study:
- To develop a robust solid-phase protocol for synthesizing chimeric oligonucleotides.
- To introduce novel O-methylphosphonate modifications and their P-S and P-N variants.
- To combine H-phosphonate and phosphoramidite chemistries for versatile oligonucleotide synthesis.
Main Methods:
- Developed a solid-phase protocol using H-phosphonate chemistry.
- Introduced O-methyl-(H)-phosphinate internucleotide linkage using specific monomers.
- Utilized oxidation, sulfurization, and amidation for novel O-methylphosphonate modifications.
- Integrated H-phosphonate coupling with phosphoramidite chemistry via iterative oxidation.
Main Results:
- Successfully synthesized chimeric oligonucleotides with phosphodiester and O-methylphosphonate linkages.
- Generated P-S and P-N variants of O-methylphosphonate modifications.
- Demonstrated the ability to combine H-phosphonate and phosphoramidite chemistries in a single protocol.
- Produced diversely modified oligonucleotide strands with high fidelity.
Conclusions:
- The developed protocol is robust and versatile for synthesizing modified oligonucleotides.
- This method expands the toolkit for creating novel nucleic acid structures.
- The synthesized oligonucleotides hold potential for various applications in biotechnology and medicine.
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