Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 282

dehydrogenation to 2,2-disubstituted 2H-benzimidazoles (2HB) (Figure 21).
Acetaldehyde affords 2-methylbenzimidazole in a similar way 62 (Figure 22).
4.2 Oxidation of 2-aminophenol
Cobaloxime(II) derivatives where
and catalyze the oxidative
dehydrogenation of 2-aminophenol (ap) at room temperature and 1 bar in
The reaction product is 2-aminophenoxazine-3-one (apx) formed
in quantitative yield according to the stoichiometric equation of Figure 23.
This system can be regarded as a functional model of Phenoxazinone
synthase, which is involved in the biosynthesis of Actinomycin D (AD), a