In the oxidation of 2-methylnaphthalene with ozone in acetic acid, the oxidant reacts mainly at the double bonds of the substituted aromatic ring to give peroxy compounds. In the presence of cobalt diacetate and sodium bromide, oxidation of the 2-methyl group occurs with formation of 2-naphthoic acid. The major product in the oxidation of 2-methylnaphthalene with ozonated transition metal compounds is 2-methyl-1,4-naphthoquinone.

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Oxidation O 0212Oxidation of 2-Methylnaphthalene with Ozone. -The cobalt-catalyzed oxidation of 2-methylnaphthalene (I) with ozone affords 2-naphthoic acid (II), while the non-catalytic oxidation leads to a mixture of hydroperoxides as main products [structures not defined]. -(MAMCHUR, A. V.; GALSTYAN, G. A.; Russ.