Synthesis of 2'-O-substituted ribonucleosides

Area of Science:

• Organic Chemistry
• Nucleoside Chemistry
• Synthetic Chemistry

Background:

• 2"-O-substituted ribonucleosides are crucial building blocks in medicinal chemistry and molecular biology.
• Existing synthesis methods can be complex and yield-limited.
• Developing efficient and high-yielding routes is essential for broader applications.

Purpose of the Study:

• To develop an efficient and high-yielding synthetic route for 2"-O-substituted ribonucleosides.
• To explore the utility of a novel protection strategy employing a cyclic silyl group.
• To synthesize various 2"-O-substituted derivatives, including silyl ethers, methyl ethers, and allyl ethers.

Main Methods:

• Simultaneous protection of 3 ahydroxyl and 5 ahydroxyl groups using a di-t-butylsilylene moiety.
• Selective silylation or alkylation of the free 2 ahydroxyl group.
• Introduction of base protection followed by removal of the cyclic silyl protection.

Main Results:

• The developed method provides efficient synthesis of 2 ahydroxyl-O-substituted ribonucleosides.
• High yields were achieved for various derivatives, including 2 ahydroxyl-O-TBDMS, 2 ahydroxyl-O-TOM, 2 ahydroxyl-O-Me, and 2 ahydroxyl-O-allyl.
• The strategy allows for controlled introduction of diverse protecting groups.

Conclusions:

• A novel and efficient synthetic strategy for 2 ahydroxyl-O-substituted ribonucleosides has been established.
• The method offers a high-yielding and versatile approach for preparing important nucleoside derivatives.
• This work facilitates access to modified nucleosides for further research and development.