Catalytic oxidations of alcohols - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 131

atmosphere always resulted in the formation of TEMPH is consistent with
this hypothesis.

Based on the results discussed above the detailed catalytic cycle
depicted in Figure 5 is proposed for the Ru/TEMPO catalyzed aerobic
oxidation of alcohols.

According to a recent report by Ishii and coworkers 34
supported on active charcoal is able to catalyze the oxidative cleavage of
vic-diols to aldehydes, using dioxygen as the oxidant, in at 60°C

(Reaction 7).

The alcohol oxidations discussed above involve as a key step the
oxidative dehydrogenation of the alcohol to form low-valent
hydridoruthenium intermediates. On the other hand, high-valent

oxoruthenium species are also able to dehydrogenate alcohols via an