Method for synthesizing AE active ester by ester exchange method

The invention discloses a method for synthesizing AE active ester by an ester exchange method. According to the method, ethyl 2-2-methoxyiminoacetate and 2-mercaptobenzothiazole are used as raw materials for preparing the AE active ester under the existence condition of organic solvents through the organic alkali catalysis ester exchange. The ethyl 2-2-methoxyiminoacetate compounds used in the reaction are methyl ester, ethyl ester, isopropyl ester or tert-butyl ester and the like; the used catalysts are organic amine compounds; the reaction solvents are aromatic hydrocarbon solvents such as methylbenzene, o-xylene and nitrobenzene. The method for synthesizing AE active ester has the advantages that the process is simple; the yield is good, and is about 83 to 88 percent; the organic phosphorus condensation reagent used in a conventional process is avoided; the phosphorus sewage discharge avoidance is reached; the environment-friendly pressure is greatly reduced; enterprises can realizethe sustainable developm