Multivalent glycomimetics: synthesis of nonavalent mannoside clusters with variation of spacer properties
摘要:
Oligosaccharide mimetics are important tools in the glycosciences. In this work, we have employed spaced glycodendrons for the synthesis of oligomannoside mimetics. Starting from a number of trivalent, branched molecular wedges, the preparation of nonavalent cluster mannosides was accomplished, which were varied with regard to the chemical characteristics of their spacer moieties and spacer lengths. For ligation of the various trivalent dendrons to the nonavalent target molecules peptide coupling was employed. (c) 2006 Elsevier Ltd. All rights reserved.
Multivalent glycomimetics: synthesis of nonavalent mannoside clusters with variation of spacer properties
作者:Anupama Patel、Thisbe K. Lindhorst
DOI:10.1016/j.carres.2006.01.024
日期:2006.7
Oligosaccharide mimetics are important tools in the glycosciences. In this work, we have employed spaced glycodendrons for the synthesis of oligomannoside mimetics. Starting from a number of trivalent, branched molecular wedges, the preparation of nonavalent cluster mannosides was accomplished, which were varied with regard to the chemical characteristics of their spacer moieties and spacer lengths. For ligation of the various trivalent dendrons to the nonavalent target molecules peptide coupling was employed. (c) 2006 Elsevier Ltd. All rights reserved.
Multivalent ligands for the mannose-specific lectin on type 1 fimbriae of Escherichia coli : syntheses and testing of trivalent α-D-mannoside clusters
作者:Sven Kötter、Ulrike Krallmann-Wenzel、Stefan Ehlers、Thisbe K. Lindhorst
DOI:10.1039/a801985a
日期:——
The syntheses of the triantennary cluster α-D-mannosides 16, 19, 23 and 24 and their capacities to inhibit mannose-dependent binding of E. coli HB 101 (pPKl4) are described. The cluster glycosides are formed by glycosylation of tris-(3-hydroxypropyl)nitromethane 13, and by linking of suitable mannoside derivatives via amide and thiourea bonds to tris-(2-carboxyethyl)nitromethane 17 and tris-(2-aminoethyl)amine 20. Functionalized mannosides are attached to the core molecules at the 6-position of the sugar ring to allow variation of the introduced aglycone moieties in order to compare their effects on the inhibitory potencies of the derived mannoside clusters. The 6-peptide-bridged cluster mannoside 19 displays the highest binding potency towards the type 1 fimbrial lectin of E. coli as tested by inhibition agglutination tests and ELISA.