Ghosh S, Andreana PR. Synthesis of an Aminooxy Derivative of the Trisaccharide Globotriose Gb3.
J Carbohydr Chem 2014;
33:381-394. [PMID:
25382930 DOI:
10.1080/07328303.2014.925913]
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Abstract
The synthesis of α-aminooxy trisaccharide moiety [α-d-Gal-(1,4)-β-d-Gal-(1,4)-β-d-Glc-α-aminooxy], related to the cell surface globotriaosylceramide (Gb3) receptor of the B subunit of the AB5 Shiga toxin of Shigella dysenteriae, has been synthesized for the first time in 11 steps with a 15% overall isolated yield. A highlight of this work entails utilizing chemically compatible synthetic transformations, including those related to glycosylation, incorporative of the succinimidyl moiety as a precursor to the aminooxy Gb3 derivative. The fully deprotected trisaccharide aminooxy compound was reacted with a carbonyl compound leading to oxime formation in quantitative yield underscoring the importance for future glyco-conjugations.
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