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One-pot oligosaccharide synthesis exploiting solvent reactivity effects.

M Lahmann¹, S Oscarson

¹Department of Organic Chemistry, Arrhenius Laboratory, Floor 6, Stockholm University, S-106 91 Stockholm, Sweden.

Organic Letters

|December 2, 2000

Summary

Efficient one-pot synthesis of trisaccharides was achieved by strategically altering solvent systems. This method leverages differing glycosylation rates for high-yield carbohydrate synthesis.

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Area of Science:

Carbohydrate Chemistry
Organic Synthesis
Glycosylation Reactions

Background:

Trisaccharide synthesis presents challenges in controlling reactivity and achieving high yields.
Sequential glycosylation often requires multiple steps and purification, impacting efficiency.

Purpose of the Study:

To develop a streamlined, one-pot method for trisaccharide synthesis.
To utilize solvent-dependent glycosylation rates for efficient carbohydrate assembly.

Main Methods:

One-pot sequential glycosylation reactions were performed.
Solvent systems were varied (Et(2)O, CH(2)Cl(2)/Et(2)O) to modulate glycosylation rates.
Reactivity of glycosyl donors and acceptors was tuned.

Main Results:

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Trisaccharides were synthesized in high yields ranging from 76% to 84%.
The method demonstrated successful control over sequential glycosylation through solvent manipulation.
A low glycosylation rate in Et(2)O followed by a higher rate in CH(2)Cl(2)/Et(2)O enabled efficient one-pot synthesis.

Conclusions:

Solvent system modulation is an effective strategy for controlling glycosylation rates in one-pot trisaccharide synthesis.
This approach offers a high-yield and efficient alternative to traditional multi-step methods.
The findings provide a valuable tool for carbohydrate chemists in synthesizing complex oligosaccharides.