Topochemical effects in the methylation of starch
article
The patterns of substitution in methylated starches, prepared in granular suspension, in the semi-dry state, and in solution, have been determined. There is evidence that the methyl groups are distributed uniformly throughout the interior of the starch granules. Methylation probably occurs exclusively in the amorphous domains. Consequently, the amylose fraction of granular starch is etherified preferentially, in contrast to methylation in solution. The physical state of the starch has no influence on the distribution of substituents amongst HO-2,3,6. The patterns of substitution are influenced markedly by the integrity of the granular structure. © 1991.
TNO Identifier
231476
ISSN
00086215
Source
Carbohydrate Research, 209(C), pp. 239-249.
Pages
239-249
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