Synthesis of GlcNAc-terminated oligosaccharides — fragments of glycoprotein O-chains

The trisaccharides GlcNAcβ1-6(GlcNAcβ1-3)GalNAcαOR and GlcNAcβ1-6(Galβ1-3)GalNAcαOR, and disaccharides GlcNAcβ1-3GalNAcαOR and GlcNAcβ1-6GalNAcαOR as spacered derivatives (R = CH₂CH₂CH₂NH₂) were synthesised using a Troc-protected glucosamine glycosyl donor at the key stage.