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Solid-phase oligosaccharide synthesis: preparation of complex structures using a novel linker and different
R B Andrade1, O J Plante, L G Melean
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge 02139, USA.
Organic Letters
|June 3, 2000
Summary
Researchers synthesized a beta-(1-->4)-linked trisaccharide using glycosyl phosphates on a polymer support. This method efficiently produced the target oligosaccharide, paving the way for complex carbohydrate synthesis.
Area of Science:
- Carbohydrate Chemistry
- Organic Synthesis
- Polymer-Supported Synthesis
Background:
- Oligosaccharide synthesis is crucial for understanding biological processes.
- Developing efficient and scalable methods for complex carbohydrate assembly remains a challenge.
- Polymer-supported synthesis offers advantages in purification and automation.
Purpose of the Study:
- To develop a novel strategy for the synthesis of beta-(1-->4)-linked oligosaccharides.
- To utilize glycosyl phosphates and a polymer support for efficient carbohydrate assembly.
- To demonstrate the release of the synthesized oligosaccharide using a novel linker and cross-metathesis.
Main Methods:
- Synthesis of a beta-(1-->4)-linked trisaccharide on a polymer support.
- Employing glycosyl phosphates as glycosyl donors.
- Utilizing a novel linker for cleavage via cross-metathesis.
- Preparation of heptasaccharide 33 in 14 steps.
Main Results:
- A beta-(1-->4)-linked trisaccharide was prepared in 53% yield.
- The synthesized oligosaccharide was released as an anomeric n-pentenyl glycoside.
- Heptasaccharide 33 was successfully synthesized in 9% yield over 14 steps.
Conclusions:
- The developed polymer-supported strategy using glycosyl phosphates is effective for synthesizing beta-(1-->4)-linked oligosaccharides.
- Cross-metathesis of the novel linker provides a viable method for releasing the desired carbohydrate structures.
- This approach offers a promising route for the efficient construction of complex carbohydrates.