Thiocarbamide and microwave-accelerated green methylation of cassava starch with dimethyl carbonate

Chengmin Hou; Yufang Chen; Wei Li

doi:10.1016/j.carres.2012.04.017

Thiocarbamide and microwave-accelerated green methylation of cassava starch with dimethyl carbonate

Carbohydr Res. 2012 Jul 1:355:87-91. doi: 10.1016/j.carres.2012.04.017. Epub 2012 May 4.

Authors

Chengmin Hou¹, Yufang Chen, Wei Li

Affiliation

¹ Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China. sxhmilyweiwei@163.com

PMID: 22632768
DOI: 10.1016/j.carres.2012.04.017

Abstract

By combining the acceleration strategies of using thiocarbamide as a active catalyst, incorporating dimethyl carbonate (DMC) as a solvent and methylating reagent and applying microwave irradiation as energy resource, methylation of cassava starch can be performed efficiently to a high degree of substitution (DS=0.6) within 4 min. The structures of native cassava starch and methylated starch were characterized by (13)C NMR spectroscopy. Their thermal property and crystal structure were studied by thermogravimetric analysis (TG and DTG) and powder X-ray diffractometry.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Formates / chemistry*
Manihot / chemistry*
Methylation
Microwaves*
Starch / chemistry*
Urea / analogs & derivatives
Urea / chemistry*

Substances

Formates
Urea
Starch
methyl carbonate