Practical and concise synthesis of nucleoside analogs

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Nucleoside analogs are vital for antisense oligonucleotides, antiviral, and anticancer treatments.
• Current synthesis methods often rely on chiral starting materials and lack efficiency and diversity.

Purpose of the Study:

• To develop a novel, flexible, and efficient synthetic protocol for nucleoside analogs.
• To enable access to diverse nucleoside analogs with variable substitutions and configurations.

Main Methods:

• A three-step protocol starting from achiral materials.
• Proline-catalyzed fluorination, enantioselective aldol reaction, reduction, and intramolecular fluoride displacement.
• Scalable synthesis demonstrated on research (2.8 g) and process (30 g) scales.

Main Results:

• Direct access to C3'/C5' protected nucleoside analogs.
• Successful synthesis of C3'/C5'-acetonide protected uridine.
• Protocol completed in ~5 days using standard laboratory techniques.

Conclusions:

• The developed protocol overcomes key challenges in nucleoside analog synthesis.
• Offers a versatile route to diverse nucleoside analogs for therapeutic development.
• Provides a scalable and efficient method for producing valuable nucleoside analogs.