| abstract |
R C₁₋₁₈-Alkyl, C₆₋₁₂-Aryl, C₇₋₁₂-Aralkyl, jeweils substituiert mit Olefin-, Alkin-, Amino-, Ether-, Thioether-, Carboxy-, Carbalkoxy-, Urethan-, quartären Ammoniumgruppen oder Halogenatomen, X O oder S, gegebenenfalls als Anion oder NR¹ mit R¹ H, C₁₋₆-Alkyl, Phenyl, C₇₋₈-Aralkyl und M H, ein Alkalikation oder ein Ammoniumion, wenn X = O ⊖ oder S ⊖ darstellt. Process for the preparation of carbonic acid derivatives of polysaccharides by reaction with reactive carbonic acid derivatives, characterized in that polysaccharides are initially treated with phosgene and optionally further with protic nucleophilic substances and / or their salts of the general formula (I) RXM (I) implements what R C₁₋₁₈ alkyl, C₆₋₁₂ aryl, C₇₋₁₂ aralkyl, each substituted with olefin, alkyne, amino, ether, thioether, carboxy, carbalkoxy, urethane, quaternary ammonium groups or halogen atoms, X O or S, optionally as an anion or NR¹ with R¹ H, C₁₋₆-alkyl, phenyl, C₇₋₈-aralkyl and M H, an alkaline ion or an ammonium ion when X = O ⊖ or S ⊖ . |