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Microwave promoted methylation of plant polysaccharides

โœ Scribed by Vandana Singh; Ashutosh Tiwari; Devendra Narayan Tripathi; Tulika Malviya

Publisher
Elsevier Science
Year
2003
Tongue
French
Weight
118 KB
Volume
44
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

O-Methylation is of outstanding importance in structural polysaccharide chemistry. A novel method for the methylation of polysaccharides using microwave (MW) irradiation is described. Seed gum from Cyamopsis tetragonolobus (Guar) was fully methylated with dimethyl sulphate and sodium hydroxide using 100% microwave power for 4 min in 68% yield. The completely methylated seed gum thus obtained was hydrolyzed by 70% formic acid followed by 0.5N H 2 SO 4 under full microwave power for 1.16 and 1.66 min, respectively. The partially methylated monosaccharides were separated and identified.

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