Novel bulky esters of cellulose.
Novel bulky esters of cellulose were synthesized homogeneously, applying the solvent systems DMA/LiCl or DMSO/TBAF, by conversion of the biopolymer with aryl polyester dendrons. The carboxylic acid moieties were efficiently activated in situ with CDI or the acid chloride was applied. Cellulose esters with DS values of up to 0.7 were obtained. The functionalization pattern was analyzed by different NMR spectroscopic techniques indicating that not only position 6 (primary hydroxyl group) but also the secondary one at position 2 was included in the reaction.
Heinze
Thomas
T
Center of Excellence for Polysaccharide Research at the Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany. Thomas.Heinze@uni-jena.de
Pohl
Matthias
M
Schaller
Jens
J
Meister
Frank
F
D000081:Acetamides / Q000737:chemistry; D002236:Carbohydrate Conformation; D002482:Cellulose / Q000138:chemical synthesis / Q000737:chemistry; D050091:Dendrimers / Q000737:chemistry*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004952:Esters / Q000138:chemical synthesis / Q000737:chemistry; D007093:Imidazoles / Q000737:chemistry; D018021:Lithium Chloride / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008954:Models, Biological; D008968:Molecular Conformation; D015394:Molecular Structure; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D000081:Acetamides; D050091:Dendrimers; D004952:Esters; D007093:Imidazoles; D000644:Quaternary Ammonium Compounds; D012997:Solvents; D014867:Water; C006900:N,N-carbonyldiimidazole; D002482:Cellulose; C009405:tetrabutylammonium; D018021:Lithium Chloride; C013959:dimethylacetamide; D004121:Dimethyl Sulfoxide