Synthesis of mono- and di-α-l-fucosylated 2-acetamido-2-deoxy-N-glycyl-β-d-glucopyranosylamines, spacered fragments of glycans of N-glycoproteins
作者:L. M. Likhosherstov、O. S. Novikova、N. N. Malysheva、V. E. Piskarev
DOI:10.1007/s11172-015-0990-7
日期:2015.5
α-l-Fucp-(1→3)-d-GlcNAc, α-l-Fucp-(1→6)-[α-l-Fucp-(1→3)]-d-GlcNAc, and β-d-Galp-(1→3)-[α-l-Fucp-(1→4)]-d-GlcNAc were converted into corresponding β-glycopyranosylamines by action of ammonium carbamate in aqueous boric acid, or in aqueous methanol in case of α-l-Fucp-(1→6)-d-GlcNAc. N-Acylation of these fucooligosaccharides with N-Z-glycine N-hydroxysuccinimide ester (Z is benzyloxycarbonyl) followed by hydrogenolytic removal of Z-group afforded corresponding N-glycyl-β-glycopyranosylamines of these fucooligosaccharides; three of them model carbohydrate-peptide region of N-glycoproteins, and the forth is an amino-spacered Lea-antigen.