CC1C=CC(C(O)=O)=CC=1.C(ON1C(=O)C2=CC=CC=C2C1=O)(=O)C1C=CC=CC=1.O=O.[C:33](O)(=[O:43])[C:34]1[CH:42]=[CH:41][C:37]([C:38]([OH:40])=[O:39])=[CH:36][CH:35]=1>[Ti].O.O.O.O.C([O-])(=O)C.[Co+2].C([O-])(=O)C.O.O.O.O.C([O-])(=O)C.[Mn+2].C([O-])(=O)C.C(O)(=O)C>[C:38]([C:37]1[CH:41]=[CH:42][C:34]([CH:33]=[O:43])=[CH:35][CH:36]=1)([OH:40])=[O:39]
In a 500-ml titanium autoclave, 15.36 g (0.113 mol) of p-toluic acid, 0.301 g (1.13 mmol) of N-benzoyloxyphthalimide, 0.112 g (0.45 mmol) of cobalt(II) acetate tetrahydrate, 0. 277 g (1.13 mmol) of manganese(II) acetate tetrahydrate and 104 g of acetic acid were placed, the resulting mixture was stirred at 190° C. in an atmosphere of a mixture of oxygen and nitrogen gases (1:1) [4 MPa (gauge pressure)] for 1 hour and thereby yielded terephthalic acid in a yield of 63.2% with a conversion from p-toluic acid of 67.4%. A small amount of 4-carboxybenzaldehyde was by-produced.
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