Title of article
Microwave promoted methylation of plant polysaccharides
Author/Authors
Singh، نويسنده , , Vandana and Tiwari، نويسنده , , Ashutosh and Tripathi، نويسنده , , Devendra Narayan and Malviya، نويسنده , , Tulika، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2003
Pages
3
From page
7295
To page
7297
Abstract
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 H2SO4 under full microwave power for 1.16 and 1.66 min, respectively. The partially methylated monosaccharides were separated and identified.
Keywords
Guar gum , Methylation , microwave irradiation , methylated monosaccharides , Hydrolysis
Journal title
Tetrahedron Letters
Serial Year
2003
Journal title
Tetrahedron Letters
Record number
1654733
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