Si-Linked Glycomimetics through a Stereoselective Silicon Transfer and Anion Addition

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Carbohydrate Chemistry

Background:

• Glycomimetics are crucial for understanding biological processes but often lack metabolic stability.
• Existing synthetic methods for glycomimetics have limitations in scope and stereochemical control.
• Silicon-containing compounds offer unique properties, including enhanced stability.

Purpose of the Study:

• To develop a novel synthetic route for silicon-linked glycomimetics.
• To achieve stereoselective control over silicon chirality during synthesis.
• To explore the potential of these novel compounds in medicinal chemistry.

Main Methods:

• Stereoselective silicon transfer and anion addition reactions.
• Kinetic resolution for controlling silicon atom chirality.
• Manipulation of C2-protected silicon ethers and nucleophilic opening of glycal epoxides.
• Application to various saccharides and substituted silanes.

Main Results:

• Successful synthesis of silicon-linked glycomimetics with unique structural properties.
• Demonstrated control over silicon chirality via kinetic resolution.
• Selective generation of 1,2-cis and 1,2-trans isomers achieved.
• High selectivity at the anomeric carbon confirmed across diverse substrates.
• Intramolecular silicon transfer mechanism elucidated, influenced by counterion and reaction conditions.

Conclusions:

• The developed method provides a robust approach to synthesizing metabolically stable glycomimetics.
• Chiral silanes generated are promising candidates for medicinal chemistry.
• This work expands the utility of glycomimetics and opens avenues for bioactive silicon-based molecules.