| 摘要 |
PURPOSE:To obtain the titled substance useful as an intermediate for organic syntheses with a small amount of a solvent efficiently in high yield, by oxidizing 2,3-dimethylnaphthalene in a high concentration in a liquid phase with molecular oxygen in the presence of a specific catalyst containing essential elements such as cobalt, manganese, etc. CONSTITUTION:2,3-Dimethylnaphthalene as a raw material is oxidized with molecular oxygen in the presence of a catalyst containing cobalt, manganese, zirconium, and bromine as essential components in a solvent, preferably acetic acid preferably <=30wt% 2,3-dimethylnaphthalene of the raw material in the reaction solvent at 60-250 deg.C, preferably 100-180 deg.C at normal pressure - about 300kg/cm<2>, to give the aimed compound. The concentration of the catalyst is preferably about 100-10,000ppm each essential element as the concentration in the solvent. An atomic ratio of bromine to cobalt is importantly kept <=3, preferably <=2. |
