Manganese and iron 2,6-disubstituted meso-tetraphenylporphyrins, bearing halogen atoms on the β-positions, have been used as catalysts for the oxidation of a cardanol derivative (hydrogenated tert-butylcardanol), using iodosilbenzene or hydrogen peroxide as oxygen atom donors. The reaction products can be correlated to the catalyst structure and to the nature of the oxidants.
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Tagliatesta et al. (2002) studied this question.