| abstract |
The invention relates to the field of production of chemical products, and specifically discloses a preparation method of a substituted benzoic acid compound of general formula (II), which uses a corresponding substituted alkylbenzene general formula (I) as a raw material, dilute nitric acid as a reaction medium, and oxygen as a reaction medium. It is an oxidant, and the selected structure is an imide compound shown in formula (III) or formula (IV) as a catalyst, and substituted benzoic acid is obtained through catalytic oxidation in an autoclave, wherein R 1 is a C 1 -C 4 alkyl group ; R 2 is halogen, nitro, C 1 -C 4 alkyl, methoxy, trifluoromethyl. The invention provides a method for preparing a green substituted benzoic acid compound with high production purity, simple preparation, mild reaction conditions, convenient post-treatment, low cost and no pollution. |