Abstract
The partial α-fucosylation of spacered (sp = CH2CH2CH2NH2) N-acetyl β-lactosamine derivative having free hydroxy groups at C-3 and C-2′ gives rise to oligosaccharides H (type 2), Lex and Ley, the first one was further elongated giving rise to A (type 2) or B (type 2) tetrasaccharides; spacered trisaccharides Galα1-3Galβ1-4GlcNAc and Galα1-4Galβ1-4GlcNAc were synthesised by the partial α-galactosylation of N-acetyl β-lactosamine derivative, having free hydroxy groups at C-4′ and C-3′.
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