Synthesis and Properties of 4'-ThioLNA/BNA
Rion Maeda1, Noriko Saito-Tarashima2, Hideaki Wakamatsu1
1Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Komatsushima 4-4-1, Aoba-ku, Sendai 981-8558, Japan.
Researchers developed a novel 4'-thio analogue of locked nucleic acid/bicyclic nucleic acid (LNA/BNA) monomers for oligonucleotide therapeutics. This new thio-LNA/BNA monomer was successfully synthesized and incorporated into oligonucleotides.
Area of Science:
- Medicinal Chemistry
- Nucleoside Chemistry
- Oligonucleotide Therapeutics
Background:
- Locked Nucleic Acid (LNA) and Bicyclic Nucleic Acid (BNA) are critical modifications for enhancing oligonucleotide stability and binding affinity.
- Developing novel nucleoside analogues is essential for advancing oligonucleotide-based therapeutics.
Purpose of the Study:
- To design and synthesize a novel 4 ahydrothio analogue of LNA/BNA monomers.
- To evaluate the applicability of the synthesized 4 ahydrothio-LNA/BNA monomers in oligonucleotide therapeutics.
Main Methods:
- Synthesis of 4 ahydroxymethyl-4 ahydrothioribonucleoside via tandem ring-contraction-aldol reaction and Pummerer-type thioglycosylation.
- Formation of 4 ahydrothio-LNA/BNA monomers using diphenyl carbonate and catalytic NaHCO3.
- Introduction of the synthesized monomers into oligonucleotide chains.
Main Results:
- Successful synthesis of the 4 ahydrothio analogue of LNA/BNA monomers.
- Demonstrated feasibility of incorporating these novel monomers into oligonucleotides.
Conclusions:
- The developed 4 ahydrothio-LNA/BNA monomers represent a promising new class of nucleoside analogues.
- These novel monomers hold potential for the development of next-generation oligonucleotide therapeutics with improved properties.
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