Azide-Modified Nucleosides as Versatile Tools for Bioorthogonal Labeling and Functionalization.

Area of Science:

• Synthetic organic chemistry
• Nucleoside chemistry
• Bioconjugation chemistry

Background:

• Azide-modified nucleosides are crucial for functionalizing nucleic acids.
• Click chemistry, specifically azide-alkyne cycloaddition, enables efficient bioconjugation.
• Demand for novel synthetic routes to these modified nucleosides is high.

Purpose of the Study:

• To review existing synthetic methodologies for azide-modified nucleosides.
• To discuss the incorporation of these modified nucleosides into oligonucleotides and cellular RNAs.
• To highlight their applications in azide-alkyne cycloaddition reactions for labeling and functionalization.

Main Methods:

• Literature review of synthetic approaches.
• Analysis of methods for nucleoside modification at sugar or base.
• Examination of incorporation strategies into nucleic acid structures.

Main Results:

• Comprehensive overview of diverse synthetic routes for azide-modified nucleosides.
• Demonstration of successful incorporation into DNA, RNA, and oligonucleotides.
• Examples of applications in labeling and functionalization via click chemistry.

Conclusions:

• Established synthetic methods provide access to a range of azide-modified nucleosides.
• These building blocks are versatile tools for nucleic acid functionalization.
• Azide-alkyne click chemistry offers powerful applications in chemical biology and beyond.