Glucose octaacetate

Definite proof that the interchain linkage is 6 —> 1-a-D has been obtained by Wolfrom and coworkers,91 who have isolated crystalline /3-isomaltose [6-0-(/3-D-glucopyranosyl)-D-glucose] octaacetate (in 1 % yield) from the mild acetolysis of waxy maize starch and have presented evidence that... 

Although the above condensations definitely failed to yield sucrose octaacetate, Irvine and his collaborators showed that they did produce, in addition to uncrystallized products, some D-glucose pentaacetate, some... 

Cellobiose Octaacetate and Glucose Pentaacetate. Eastman White Label materials were purified by recrystallization from a methylene chloride-methanol mixture. 

Mass Spectrometric Analysis of Volatiles during Photolysis. Samples investigated were cellulose triacetate, cellobiose octaacetate, glucose pentaacetate, cellobiose, and glucose. 

Cellobiose Octaacetate and Glucose Pentaacetate. In both cases the major component observed at 2 to 5 minutes was CH2=C=0, with lesser amounts of CO, C02, CH3COOH, and H20. H2 was not observed. 

Cellobiose Octaacetate and Glucose Pentaacetate. The results on both compounds were similar. Samples irradiated at 253.7 and 313 mfi, both in the presence of oxygen and in vacuum, were saponified. Infrared analysis of the saponified residues showed that all samples had carbonyl absorption at 5.76 to 5.78 microns, owing to lactones, ketones,... 

Glucose pentaacetate and cellobiose octaacetate also yielded a fraction which was insoluble in methylene chloride and which appeared polymeric and amorphous. 

Comparative investigations with related monomeric compounds, glucose pentaacetate, and cellobiose octaacetate indicate that, on a qualitative basis, these materials undergo photolytic changes in a manner similar to cellulose triacetate. These materials may serve as model compounds for future quantitative investigations of cellulose triacetate. 

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