Über die synthese unverzweigter polysaccharide

✍ Scribed by Husemann, Von E. ;Müller, G. J. M.

• Book ID: 102937677
• Publisher: Wiley (John Wiley & Sons)
• Year: 1966
• Weight: 827 KB
• Volume: 91
• Category: Article
• ISSN: 0025-116X
• DOI: 10.1002/macp.1966.020910114

✦ Synopsis

2,3,6-Glucose-tricarbanilate prepared by degradation of cellulosetricarbanilate in 1-hydroxy-2-methoxy-ethane in presence of p-toluenesulfonic acid was condensed with phosphor pentoxide in a mixture of chloroform-dimethyl sulfoxide. Light scattering measurements gave degrees of polymerization up to 640. Contrarily to cellulose-and amylosetricarbanilates there was no definite relation between the STAUDINGER-Indices and molecular weights. Also no angular dependence of the scattered light was found. The products therefore are branched. The side chains are bound to the carbanilate groups, for after alkaline saponification of the polyglucosans the degrees of polymerization decrease to about 60. Degradation experiments with a-amylase and cellulase, optical rotation in tetraethylammoniumhydroxide and viscosity measurements of polyglucosans compared with those of different cellodextrins showed clearly that only 1,4+glucosidic linkages are present in the synthetic polysaccharides and that the products are not branched.