Field RA, Otter A, Fu W, Hindsgaul O. Synthesis and 1H NMR characterization of the six isomeric mono-O-sulfates of 8-methoxycarbonyloct-1-yl O-beta-D-galactopyranosyl-(1-->4)-2-acetamido-2-deoxy-beta-D-glucopyran oside.
Carbohydr Res 1995;
276:347-63. [PMID:
8542605 DOI:
10.1016/0008-6215(95)00235-l]
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Abstract
All six isomeric mono-O-sulfates of beta-D-Galp-(1-->4)-beta-D-GlcpNAc-O-(CH2)8COOMe (LacNAc-MC) have been chemically synthesized and characterized by high resolution 1H NMR spectroscopy. Sulfation causes characteristic substitution-site-specific downfield shifts of 1H NMR signals. The 4C1 chair conformation of both pyranose residues of LacNAc are unaffected by mono-O-sulfation, and, with the exception of the 3-O-sulfate derivative, glycosidic torsion angles are also unaffected.
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