Synthesis ofN-acetyllactosamine-containing oligosaccharides, galectin ligands

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Abstract

Abstract—

The following spacered oligosaccharides were synthesized: GlcNAcβ1-3Galβ1-4GlcNAcβ-sp, GlcNAcβ1-6Galβ1-4GlcNAcβ-sp, GlcNAcβ1-3(GlcNAcβ1-6)Galβ1-4GlcNAcβ-sp, Galβ1-4GlcNAcβ1-3Galβ1-4GlcNAcβ-sp, Galβ1-4GlcNAcβ1-6Galβ1-4GlcNAcβ-sp, Galβ1-4GlcNAcβ1-3(Galβ1-4GlcNAcβ1-6)Galβ1-4GlcNAcβ-sp, GlcNAcβ1-3(Galβ1-4GlcNAcβ1-6)Galβ1-4GlcNAcβ-sp, and Galβ1-4GlcNAcβ1-3(GlcNAcβ1-6)Galβ1-4GlcNAcβ-sp (sp = O(CH2)2NH2). They represent N-acetyllactosamines substituted with N-acetylglycosamine or N-acetyllalctosamine residue at O3, O6, or at both positions of galactose. Glycosylation was achieved by coupling with N-trichloroethoxycarbonyl-protected glucosamine bromide in the presence of silver triflate.

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