Related Experiment Videos
A strategy for the solid-phase synthesis of oligosaccharides
S J Danishefsky1, K F McClure, J T Randolph
1Department of Chemistry, Yale University, New Haven, CT 06511.
Science (New York, N.Y.)
|May 28, 1993
Summary
A novel solid-phase synthesis method enables efficient production of oligosaccharides. This technique uses glycals attached to a polymer support, allowing for stereospecific glycosidic linkage formation and avoiding deletions.
Area of Science:
- Carbohydrate Chemistry
- Organic Synthesis
- Polymer Chemistry
Background:
- Oligosaccharides are complex carbohydrates with crucial biological roles.
- Traditional synthesis methods can be lengthy and inefficient, often resulting in deletions.
- Solid-phase synthesis offers advantages in purification and automation for complex molecule construction.
Purpose of the Study:
- To develop an efficient solid-phase method for synthesizing repeating glycosidic linkages in oligosaccharides.
- To enable stereospecific glycosidation reactions.
- To avoid common issues like interior deletions during synthesis.
Main Methods:
- Glycals were immobilized onto a polystyrene copolymer via a silyl ether linkage.
- Immobilized glycals were activated as glycosyl donors using 3,3-dimethyldioxirane.
- Solution-phase glycals served as acceptors in glycosidation reactions, followed by rinsing to remove excess reagents and purification via tetra-n-butylammonium fluoride cleavage.
Main Results:
- The solid-phase method successfully synthesized oligosaccharides with repeating glycosidic linkages.
- Glycosidation reactions proceeded with high stereospecificity.
- The method effectively prevented interior deletions, simplifying purification.
Conclusions:
- This solid-phase approach provides a robust and efficient strategy for oligosaccharide synthesis.
- The method's ability to ensure stereospecificity and avoid deletions makes it valuable for constructing complex carbohydrate structures.