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Synthesis and preliminary characterisation of new esters of the bacterial polysaccharide gellan

✍ Scribed by Vittorio Crescenzi; Mariella Dentini; Maurizio Segatori; Cinzia Tiblandi; Lanfranco Callegaro; Luca Benedetti

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
500 KB
Volume
231
Category
Article
ISSN
0008-6215

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✦ Synopsis

Under the appropriate experimental conditions, ethyl, propyl, and methylprednisolon-21-yl esters of gellan can be obtained without significant degradation. At low degrees of esterification (de), depending on the ester moiety, the products are water-soluble, which allows the influence of hydrophilicity and charge density on their ability to assume an ordered conformation in dilute aqueous solution to be studied. With high de, the products were soluble only in organic solvents (e.g., methyl sulphoxide) with good film-forming capacity. The methylprednisolon-21-yl esters have been characterised in a preliminary manner in terms of drug-release kinetics.

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