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Novel Bulky Esters of Biopolymers: Dendritic Cellulose
Author(s) -
Pohl Matthias,
Schaller Jens,
Meister Frank,
Heinze Thomas
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200850212
Subject(s) - cellulose , chemistry , biopolymer , aryl , polymer chemistry , dendrimer , acetamide , fluoride , polyester , chloride , organic chemistry , dimethyl sulfoxide , carboxylic acid , chemical modification , sulfoxide , solvent , polymer , inorganic chemistry , alkyl
Dendronized cellulose derivatives are discussed. Regarding our own studies, novel bulky esters of cellulose were synthesized homogeneously in N , N ‐ dimethyl acetamide/LiCl or dimethyl sulfoxide in combination with fluoride ions by conversion of the biopolymer with 3,5‐dihydroxybenzoic acid based aryl polyester dendrons. The carboxylic acid moieties were efficiently activated in situ with N , N ′‐carbonyldiimidazole or the acid chloride was applied. Cellulose esters with values of the degree of substitution of up to 0.7 were obtained. The functionalization analyzed by NMR spectroscopy occurs not only at position 6 (primary hydroxyl group) but also the secondary one at position 2.