| abstract |
PURPOSE: To obtain the titled substance useful as a raw material of agricultural chemicals, etc., in high conversion and yield, without precipitating the insoluble solid chromium salt, by the liquid-phase oxidation of tetraline with molecular oxygen in the presence of a catalyst composed of a soluble chromium salt and a 2-pyrrolidone compound under mild condition. n CONSTITUTION: The titled compound is produced by reacting tetraline with molecular oxygen or an oxygen-containing gas at 30W160°C, preferably 60W130°C in the presence of a catalyst composed of (A) a soluble chromium salt and (B) a 2- pyrrolidone compound of formula (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are H or alkyl) or its mixture. The volume ratio of the 2-pyrrolidone compound used as the catalyst to tetraline is preferably 1:20W5:1, and the amount of the soluble chromium salt is preferably 0.001W0.05mol/l. The partial pressure of oxygen is preferably ≥0.1atm. n COPYRIGHT: (C)1985,JPO&Japio |