Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 296

under fluorous biphase conditions in the presence of 2-methylpropanal
(Table 2). Advantages of this approach include higher substrate to catalyst
ratios (1000:1), facile product separation and recycling of the expensive
fluorous solvent.
and its fluorinated analog catalyze the oxidation
of ethane, propane and cyclohexane by (100 psi, 85°C, 20-24 hours) to
the corresponding alcohols in the presence of CO, in a mixture of
trifluoroacetic acid and water. Further oxidation to aldehydes and acids also
takes place 108 . It is proposed that CO converts the known superoxo species
to an oxocobalt(IV) complex, which is capable of abstracting
an H-atom from the alkanes (eq. 23). This possibility has been suggested
earlier for cobaloxime(II)-catalyzed oxidations 60,61 .