Complexes of carbohydrates with aluminate ion. Aldose-ketose interconversion on anion-exchange resin (aluminate and hydroxide forms)
1979
Rendleman, J.A. Jr | Hodge, J.E.
Kinetic parameters for aldose and ketose transformations in the d-glucose-d-mannose-d-fructose system at 27° on aluminate resin and hydroxide resin were obtained. On both resins, hydroxide ion functions as the catalyst for isomerization. By forming a complex with d-fructose, resin-bound aluminate ion stabilizes the ketose and permits high yields (up to 72%) of d-fructose from d-glucose. The effect of temperature on d-glucose-to-d-fructose conversion was studied; lower temperatures give the higher maximum yields. Maltose is converted into maltulose in moderately high yield (63%) at 24° on aluminate resin; higher yields are not possible at this temperature because of a marked tendency for maltulose to undergo elimination of d-glucose at C-4.
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