Indirect Electrooxidation by Using Ruthenium Tetraoxide and Chloride Ion as Recycling Mediators. Optimization for the Oxidation of Diisopropylidene-D-glucose to the Ulose

Article abstract of DOI:10.1246/bcsj.62.2108

Various Various factors related to the yield and selectivity for the indirect electrooxidation of diidopropylidene-glucose (1) to the ulose 2 with ruthenium tetraoxide (RuO4) and chloride ion are investigated.The following is found to be optimum conditions: pH, ca. 10:solvent system, carbon tetrachloride and t-butyl alcohol (ca.9:1); current density, 10-40 mAcm^2-; temperature, 20-40 deg C; catalyst amount, 2 molpercent of RuO2.2H2O (based on 1).The optimized electrolysis affords the desired 2 in 90 percent yield along with a trace of the cleavaged product 3 (0.2percent) by an overoxidation.