Abstract
Blood group A tetrasaccharides of different types have the same terminal trisaccharide fragment that allows using a block scheme in their synthesis. 3-Aminopropyl glycosides of tetrasaccharides GalNAcα1-3(Fucα1-2)Galβ1-3GlcNAcβ (A type 1), GalNAcα1-3(Fucα1-2)Galβ1-3GalNAcα (A type 3), and GalNAcα1-3(Fucα1-2)Galβ1-3GalNAcβ (A type 4) were synthesised using acetylated Galα1-3(Fucα1-2)Gal trichloroacetimidate as a glycosyl donor at the key stage.
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