gem-Difluorocarbadisaccharides: restoring the exo-anomeric effect

Area of Science:

• Chemical glycobiology
• Organic chemistry
• Computational chemistry

Background:

• Molecular mimicry is crucial for developing drugs and molecular probes.
• Glycomimetics are sugar analogues used in drug design.
• Failures in glycomimetic use are often attributed to the absence of the anomeric effect.

Purpose of the Study:

• To investigate the restoration of the anomeric effect in acetals.
• To explore the impact of replacing oxygen with a CF2 group on the anomeric effect.
• To provide new avenues for sugar-based drug design.

Main Methods:

• Chemical synthesis of CF2-containing acetals.
• Nuclear Magnetic Resonance (NMR) spectroscopy for structural analysis.
• Theoretical calculations to understand electronic properties.

Main Results:

• Successfully restored the anomeric effect in acetals by incorporating a CF2 group.
• Demonstrated the critical role of the stereoelectronic component in the anomeric effect.
• The CF2 analogue adopted a natural glycoside conformation.

Conclusions:

• The stereoelectronic component is key to the anomeric effect.
• CF2-modified acetals offer a promising strategy for designing novel sugar-based drugs.
• This work advances the understanding of fundamental chemical principles and their application in medicinal chemistry.