Synthesis of glycopeptide dendrimers, dimerization and affinity for Concanavalin A

We described herein the synthesis of second generation glycopeptide dendrimers G2a-g presenting variable amino acids placed internally into the multivalent scaffold. The effect of such structural modulation on recognition processes by Concanavalin A (Con A), was then estimated by enhanced-sensitivity Enzyme-Linked Lectin Assay (ELLA). In a complementary study, glycopeptide dendrons of different valencies and including a L-cysteine residue before the dendritic core (G0SH, G1SH and G2SH), were also synthesized and homodimerized. Then, the disulfide-containing glycopeptide dendrimers generated by such a convergent approach (G02S2, G12S2 and G22S2) were used as Con A inhibitors and assaied by ELLA.