Katalytische Oxidation von Isomaltulose

Catalytic Oxidation of Isomaltulose. In carbohydrate chemistry the noble metal catalyzed oxidation is known as a “clean” reaction with high selectivity. Applied to the disaccharide ketose isomaltulose, the reaction gives two monooxidized and one dioxidized products contrary to the selectivity rules, which were earned for monosaccharides by Heyns in fundamental investigations. However, the kinetic studies of this reaction show that the dioxidation is a two step reaction in which the second step is inhibited by high isomaltulose concentrations. This could be used for the development of a process of technical interest for preparing the monooxidized products because the continous removal of the ionic reaction products with an electrodialysis allowed the realization of optimal reaction conditions. Klein et al. show that these monooxidized products are important intermediates for semisynthetic polymers.