From l-Rhamnose to Rare 6-Deoxy-l-Hexoses

Area of Science:

• Carbohydrate Chemistry
• Organic Synthesis

Background:

• 6-deoxy-l-hexoses are rare sugars with limited synthetic accessibility.
• Efficient methods for their synthesis are crucial for applications in glycobiology and drug discovery.

Purpose of the Study:

• To develop a rapid and efficient method for synthesizing all isomeric 6-deoxy-l-hexoses.
• To provide access to these rare sugars as stable thioglycoside building blocks.

Main Methods:

• Regio- and stereoselective nucleophilic displacement of triflate groups.
• Regioselective protection strategies.
• One-pot double displacement reactions and cascade inversions.

Main Results:

• Efficient transformation of l-rhamnose into all isomeric 6-deoxy-l-hexoses.
• Successful synthesis of rare 6-deoxy-l-hexoses.
• Generation of stable thioglycoside building blocks.

Conclusions:

• The reported methodology offers a facile and rapid route to rare 6-deoxy-l-hexoses.
• This approach enables the production of valuable thioglycoside building blocks for further chemical applications.