title: Synthesis of starch derivatives with labile cationic groups.
abstract: A new route to starch derivatives bearing hydrolyzable cationic groups was developed. This was based on reacting starch compounds with betaine derivatives in the presence of diisopropylcarbodiimide and 4-dimethylaminopyridine as coupling reagents in an aprotic polar solvent. Water-soluble starches with a perfectly controlled degree of substitution were thus obtained which were fully characterized by infrared, 1H and 13C spectroscopy and viscosity measurements. The cationic groups grafted on the polysaccharides are shown to hydrolyze slowly upon storage at room temperature.
authors.affiliation: Centre de Recherches sur les Macromolécules Végétales (CNRS), Université Joseph Fourier de Grenoble, BP 53, 38041 Grenoble Cedex, France. rachel.auzely@cermav.cnrs.fr
authors.forename: Rachel
authors.initials: R
authors.lastname: Auzély-Velty
authors.forename: Marguerite
authors.initials: M
authors.lastname: Rinaudo
mesh_terms: D015761:4-Aminopyridine / Q000031:analogs & derivatives* / Q000737:chemistry; D001622:Betaine / Q000737:chemistry; D002234:Carbodiimides / Q000737:chemistry; D002412:Cations; D003505:Cyclodextrins / Q000737:chemistry; D004952:Esters; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D011134:Polysaccharides / Q000737:chemistry; D011522:Protons; D013053:Spectrophotometry; D013213:Starch / Q000138:chemical synthesis* / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D002234:Carbodiimides; D002412:Cations; D003505:Cyclodextrins; D004952:Esters; D011134:Polysaccharides; D011522:Protons; D014867:Water; D001622:Betaine; C081611:1,3-diisopropylcarbodiimide; C008315:maltodextrin; D013213:Starch; D015761:4-Aminopyridine; C003885:4-dimethylaminopyridine