Beilstein J. Org. Chem.2019,15, 2990–2999, doi:10.3762/bjoc.15.295
in the presence of acetic anhydride. Among the various Lewis acids tested, the desired acetolysisproducts were obtained in moderate yields under tin(IV) chloride catalysis. Our methodology could be extended to regioselective protecting group installations and manipulations towards a number of
thiosialoside and halide donors.
Keywords: acetolysis; acetolysisproducts; 2,7-anhydrosialic acid; SnCl4; Introduction
Sialic acids are the most prevalent monosaccharides that are found at the nonreducing ends of glycans, and they are involved in many biologically important ligand–receptor interactions [1
backbone of Neu5Ac. Thus, the aim of this study was to cleave the ring of the 2,7-anhydro derivatives with a choice of suitable Lewis acids as catalysts in order to utilize the acetolysisproducts as building blocks for the chemical synthesis of Neu5Ac-containing glycans.
Results and Discussion
It is known
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Graphical Abstract
Figure 1:
Representative structures of bacterial glycans containing sialic acid.