| abstract |
PROBLEM TO BE SOLVED: To produce a desired aromatic and heteroaromatic carboxylic acid in a higher yield while keeping the amount of by-products extremely low under simple process conditions. To provide a way to make it possible. The method comprises catalytically oxidizing an alkylaromatic compound to a corresponding aromatic or heteroaromatic carboxylic acid, comprising a C 1 -C 6 mono- or dicarboxylic acid, Ester, water, a solvent selected halogenated hydrocarbons, acetonitrile, C 1 -C 6 alcohols, silicones, from the group consisting of high-boiling solvent or a mixture of two or more of these silicone oils or chemically inert In the presence of a transition metal catalyst and optionally an acid, A process as described above comprising oxidizing an alkylaromatic compound with ozone at a temperature of 70 ° C to 110 ° C to the corresponding carboxylic acid, which is then isolated from the reaction mixture. |