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Xylan derivatives: Benzyl ethers, synthesis, and characterization

✍ Scribed by Marc Vincendon

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
137 KB
Volume
67
Category
Article
ISSN
0021-8995

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✦ Synopsis

The -2,3-bis(benzyl ether) of xylan, a natural polysaccharide, has been prepared by using a new benzylation method. This method was first tested on methylb-D-xylopyranoside, the monomer model of xylan. It implies the use of potassium hydroxyde, a crown ether as a catalyst, and benzyl bromide as a benzylating agent. Perbenzylated xylan is obtained with a good yield (80%) in a one-step reaction. It is soluble in most organic solvents. The 13 C-and 1 H-NMR spectra of this polymer were assigned and are typical of a regular linear polymer. Differential thermal analysis and thermogravimetry indicate the temperature range at which this polymer can be processed at high temperature.

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