Synthetic Studies

Synthesis of N-Acetyllactosamine-Containing Oligosaccharides, Galectin Ligands

V. V. Severov1, I. M. Belyanchikov1, G. V. Pazynina1 and N. V. Bovin1#

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1Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia

Received: April 16, 2006; in final from: May 24, 2006

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.

Key words: oligo-N-acetyllactosamines, oligosaccharide synthesis

Russian Journal of Bioorganic Chemistry 2007, 33 (1): 122-138