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DOI: 10.1055/a-2676-4785
Synthesis of 4-Acetamido-4-deoxy-β-d-quinovose Containing Branched Pentasaccharide Corresponding to the Cell Wall O-antigen of Acinetobacter baumannii Strain 9

Abstract
A convenient strategy has been developed for the synthesis of a branched pentasaccharide containing a rare sugar, 4-acetamido-4-deoxy-β-d-quinovose, corresponding to the cell wall O-antigen of Acinetobacter baumannii strain 9 in very good yield. The desired pentasaccharide has been achieved as a fully deprotected form enabling the scope for the conjugation with an appropriate aglycone or protein. The constructions of 1,2-cis glycosyl linkages between the d-galactosamine and d-glucose moieties in the molecule were achieved using thioglycosides as glycosyl donors under iodonium ion–promoted glycosylation conditions in an ether-based solvent.
Keywords
Carbohydrates - Glycosylation - Glycosides - Oligosaccharides - Total synthesis - Acinetobacter baumanniiPublication History
Received: 01 July 2025
Accepted after revision: 04 August 2025
Article published online:
19 August 2025
© 2025. Thieme. All rights reserved.
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