Preparation method of methyl 4-acetamido-5-chloro-2-methoxybenzoate

The invention relates to the technical field of chemical synthesis, and concretely relates to a preparation method of methyl 4-acetamido-5-chloro-2-methoxybenzoate. The method comprises the following steps: dissolving methyl 4-acetamido-2-methoxybenzoate in N,N-dimethyl formamide, adding N-chlorosuccimide, carrying out a heat insulation reaction to obtain crude methyl 4-acetamido-5-chloro-2-methoxybenzoate, separating out the crude methyl 4-acetamido-5-chloro-2-methoxybenzoate to obtain an N,N-dimethyl formamide mother liquor, and directly using the N,N-dimethyl formamide mother liquor as a solvent for preparing methyl 4-acetamido-5-chloro-2-methoxybenzoate without treatment. The preparation method has the advantages of high mole yield, low cost, safety and environmental protection.