A new catalytic oxidation method for the preparation of aromatic carboxylic acids from methyl aryl ketones is reported.The method is an alternative to the haloform reaction;it is benign and affords the desired product without production of any harmful side products.The catalytic cycle is based on the use of an electron-deficient nitroarene as catalyst with either of the two chetlp and green oxidants sodium percarbonate or sodium perborate.The method gives a good yield (87%) and shows excellent selectivity when the model substrate (acetophenone) is oxidized.A series of benzoic acids of industrial interest were prepared by means of this method.
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