Cereal Chem 46:304 - 309.  |  VIEW ARTICLE
Distribution of Hydroxyethyl Groups in Hydroxyethyl Starch.

G. N. Bollenback, R. S. Golik, and F. W. Parrish. Copyright 1969 by the American Association of Cereal Chemists, Inc. 

By isolation of the products of acidic hydrolysis of hydroxyethyl starch (0.6 molar substitution), the distribution of hydroxyethyl groups on the C-2, C-3, and C-6 hydroxyl groups of the anhydroglucose units is established as k2:k6:k3 = 5.6:1.0:0.2. There is little polysubstitution (e.g. 2,6-, 2,3-, etc.) and little polyoxyethylene substituent. A minor product, cis-1,2-O-ethylene-D-glucofuranose, formed by dehydration of 2-O-hydroxyethyl-D-glucose, has been fully characterized.