ChemInform Abstract: Synthesis of Monosaccharides of Unsaturated Esters.

Abstract

Synthesis of Monosaccharides of Unsaturated Esters.-Methacryloyl-O-glycosides are prepared starting from D-glucosides or Dmannosides via diboronate glycosides, selective hydrolysis to give diboronates, acylation with methacryloyl anhydride, and final removal of boronate groups by methanolysis to give esters like (VI). Acryloyl ester (X), 3-acryloyl-D-glucose, and 1-acryloyl-L-sorbose are obtained by another route involving the acylation of diisopropylidene protected sugars with acryloyl chloride and subsequent removal of the isopropylidene groups by treatment with formic acid or in the presence of KU-2-8 catalyst.-(SLIVKIN, A. I.; LAPENKO, V. L.; Izv.

Structure and stability of anionic liposomes complexes with PEG-chitosan branched copolymer

“…Chitosan is a bio compatible and biodegradable polycationic polysac charide widely used in cosmetic and pharmaceutical industry as a drug carrier [6][7][8][9][10][11][12][13]. Physicochemical properties of chitosan based copolymers can be varied in a wide range depending on the polysaccharide molecular weight and degree of deacetylation of its amino groups [14,15]. The presence of amino groups, in turn, provides for a wide spectrum of possible chemical modifications of chitosan [15][16][17][18][19].…”