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• W2891989738 abstract "Glycosaminoglycans (GAGs) are among the most complex, biologically active polysaccharides in nature. The complexity of GAGs greatly impedes their synthesis, thus complicating the structure–property studies that are so necessary for us to understand the roles of GAGs in natural processes, in pathogen invasion, and to understand how to develop effective interventions, for example, to prevent undesired GAG hijacking by pathogens. Total synthesis of GAG oligomers from monosaccharide building blocks is useful, but incredibly labor-intensive, expensive, and inefficient. In this study, we report a regiospecific synthetic route to two types of designed GAG analogs by chemical modification of commercially available, inexpensive cellulose acetate. Cellulose acetate was first brominated, followed by azide displacement to introduce azides as the GAG amine precursors. The resulting 6-N3 cellulose acetate was then saponified to liberate 6-OH groups. Subsequent oxidation of the liberated primary hydroxyl groups to carboxyl groups was smoothly effected by a TEMPO-catalyzed process. Finally, the azides were reduced to amines using an aqueous process, new to polysaccharide chemistry, employing reduction by dithiothreitol (DTT). Alternatively, another process new to polysaccharide chemistry could be employed to convert most of the azides to acetamido groups (mimicking those present, for example, in native hyaluronic acid) by reduction with thioacetic acid. All the intermediates and products were characterized by 1H NMR, 13C NMR, and FT-IR spectroscopy. This synthetic route provides access to GAG analogs that will be of great interest for exploring structure–property relationships in various biomedical applications." @default.
• W2891989738 created "2018-09-27" @default.
• W2891989738 creator A5025806929 @default.
• W2891989738 creator A5042570256 @default.
• W2891989738 date "2018-09-10" @default.
• W2891989738 modified "2023-09-24" @default.
• W2891989738 title "Efficient Synthesis of Glycosaminoglycan Analogs" @default.
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• W2891989738 doi "https://doi.org/10.1021/acs.biomac.8b01150" @default.
• W2891989738 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30199235" @default.
• W2891989738 hasPublicationYear "2018" @default.
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