Abstract
Dextran fractions with a narrow molecular weight distribution were modified using the 4-nitrophenyl chloroformate activation method. The activated polymers were subsequently reacted with a small amount of L- tyrosinamide and a number of selected peracetylated ω-amino glycosides of D- mannose, D-galactose, L-fucose and L-rhamnose and including some cluster de rivatives. All monosaccharides were linked to the polymer chain via a carbon C-6 spacer.
The number of L-tyrosinamide units introduced could be accurately deter mined by UV absorption spectroscopy. On the other hand, the degree of substi tution by a glycoside ligand was calculated from 1H NMR data.
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