Synthesis of a Nucleobase-Modified ProTide Library.

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Nucleoside Chemistry

Background:

• Nucleoside prodrugs, particularly ProTides, are crucial in antiviral and anticancer therapies.
• Existing synthetic methods for ProTides can be limited in scope and flexibility.
• Developing efficient and versatile synthetic routes is essential for drug discovery.

Purpose of the Study:

• To present a new, flexible method for synthesizing (aryloxy)phosphoramidate nucleoside prodrugs (ProTides).
• To demonstrate the utility of a key (aryloxy)phosphoramidate ribose derivative as a building block.
• To explore the structural diversity achievable, particularly in the nucleobase moiety.

Main Methods:

• Utilized a novel (aryloxy)phosphoramidate ribose derivative as a key intermediate.
• Employed Vorbrüggen reaction conditions for coupling with various nucleobases.
• Performed selective hydrolysis of acetoxy groups to yield the final ProTides.

Main Results:

• Achieved excellent yields in the coupling of the ribose derivative with multiple nucleobases.
• Successfully synthesized a series of protected ProTides.
• Demonstrated the selective deprotection to afford the desired ProTides.

Conclusions:

• The presented method offers a significant advantage over classical procedures for ProTide synthesis.
• This approach provides greater flexibility in modifying the nucleobase component of ProTides.
• The new synthetic strategy facilitates the generation of diverse ProTide analogues for further investigation.