Copper-dioxygen complexes and their roles in biomimetic oxidation reactions - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 106

with prior to exposure to dioxygen resulted in oxygenation

products.

Kodera and co-workers 113 have also reported on copper-mediated C-H
bond oxygenation in two tris-pyridyl methane ligands at the methine position
when the corresponding Cu(II) complexes are exposed to Labeling

experiments with confirm that the oxygen atom comes from dioxygen.