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Sulfide-mediated dehydrative glycosylation
H M Nguyen1, Y Chen, S G Duron
1Department of Chemistry, Roger Adams Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Journal of the American Chemical Society
|September 6, 2001
Summary
A novel glycosylation method uses dialkyl sulfonium reagents for efficient anomeric bond formation. This controlled dehydrative coupling method offers a new pathway for synthesizing complex carbohydrates.
Area of Science:
- Organic Chemistry
- Carbohydrate Chemistry
- Synthetic Chemistry
Background:
- Glycosylation is crucial for synthesizing biologically active carbohydrates.
- Existing glycosylation methods often face challenges with efficiency and stereoselectivity.
- Developing new, robust glycosylation strategies remains an active area of research.
Purpose of the Study:
- To describe a new method for glycosylation using 1-hydroxy glycosyl donors.
- To utilize dialkyl sulfonium reagents for controlled anomeric bond construction.
- To establish a facile and efficient glycosylation protocol.
Main Methods:
- Employing a combination of dialkyl sulfide and triflic anhydride.
- Utilizing 1-hydroxy glycosyl donors and nucleophilic acceptors.
- Characterizing the reaction mechanism involving sulfide-to-sulfoxide oxidation.
Main Results:
- Successful development of a novel glycosylation method.
- Demonstration of controlled dehydrative coupling for anomeric bond formation.
- Identification of triflic anhydride as the key oxidant in the process.
Conclusions:
- The new method provides an efficient route for glycosylation.
- Dialkyl sulfonium reagents offer a versatile tool for carbohydrate synthesis.
- This approach facilitates the construction of complex glycosidic linkages.
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