Computational evidence of glycosyl cations

Glycosyl cations are key intermediates in the glycosylation reactions taking place through a S N 1-type mechanism. To obtain a reliable description of the glycosylation reaction mechanism a combination of computational studies and experimental data such as kinetic isotopic effects is needed. Computa...

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Bibliographic Details
Published in:Organic & biomolecular chemistry 2021-03, Vol.19 (11), p.235-2365
Main Authors: Merino, Pedro, Delso, Ignacio, Pereira, Sandra, Orta, Sara, Pedrón, Manuel, Tejero, Tomás
Format: Article
Language:English
Subjects:
Cations
Computational chemistry
Computer applications
Glycosylation
Intermediates
Ion pairs
Ion recombination
Reaction mechanisms
Recombination
Software
State-of-the-art reviews
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Summary:Glycosyl cations are key intermediates in the glycosylation reactions taking place through a S N 1-type mechanism. To obtain a reliable description of the glycosylation reaction mechanism a combination of computational studies and experimental data such as kinetic isotopic effects is needed. Computational studies have elucidated S N 2-type glycosylation reaction mechanisms, but elucidation of mechanisms in which ion pairs can be formed presents some difficulties because of the recombination of the ions. Recent topological and dynamic studies open the door to the ultimate confirmation of the presence of glycosyl cations in the form of intimate ion pairs during certain glycosylation reactions. This review covers the state-of-the-art tools and applications of computational chemistry mainly developed during the last ten years to understand glycosylation reactions in which an oxocarbenium ion could be involved. This review covers recent computational studies evidencing the presence of glycosyl cations as real intermediates in several glycosylation reactions.
ISSN:1477-0520
1477-0539
DOI:10.1039/d0ob02373f