Synthesis of carbohydrate derivatives using solid-phase work-up and scavenging techniques.

Area of Science:

• Carbohydrate Chemistry
• Organic Synthesis
• Glycoscience

Background:

• Conventional oligosaccharide preparation often involves challenging column chromatography and aqueous work-up procedures.
• These traditional methods can be time-consuming, difficult to automate, and unsuitable for parallel synthesis.
• There is a need for more efficient and streamlined methods for oligosaccharide synthesis.

Purpose of the Study:

• To develop a clean and efficient method for oligosaccharide preparation.
• To establish a route suitable for automation and parallel library formation.
• To investigate glycosidation reactions using specific donors and activators.

Main Methods:

• Investigated glycosidation reactions between various glycosyl acceptors and selenophenyl glycosyl donors.
• Utilized iodine as an activator in the presence of 2,6-di-tert-butyl-4-methylpyridine (DTBMP), a hindered organic base.
• Employed polymer-supported tosyl chloride to scavenge hydroxyl-containing contaminants, avoiding aqueous work-up and column chromatography.

Main Results:

• Successfully demonstrated a clean method for oligosaccharide preparation.
• The developed route allows for rapid synthesis of oligosaccharides.
• The method is amenable to automation and parallel library synthesis.

Conclusions:

• A novel, chromatography-free, and aqueous-workup-free method for oligosaccharide synthesis has been established.
• This approach facilitates rapid, automated, and parallel preparation of oligosaccharides.
• The findings offer a significant advancement in synthetic carbohydrate chemistry, enabling efficient access to complex carbohydrate structures.