Synthesis method of N-phenyl-N-trichloromethylthio benzenesulfonamide

The invention relates to the technical field of organic synthesis, and particularly discloses a synthesis method of N-phenyl-N-trichloromethylthio benzenesulfonamide. The synthesis method comprises the following steps: uniformly mixing aniline, 4-dimethylaminopyridine and water to obtain an emulsion; under the condition of 10-25 DEG C, dropwise adding benzene sulfonyl chloride into the emulsion, carrying out heat preservation reaction for 10-20 hours, and filtering to obtain an intermediate; and uniformly mixing the intermediate, 4-dimethylaminopyridine and caustic soda liquid at the temperature of-5 DEG C to 0 DEG C, dropwise adding perchloromethyl mercaptan at the temperature of-5 DEG C to 5 DEG C, carrying out hydrolysis reaction for 1-2 hours after dropwise adding, centrifuging, collecting a filter cake, cleaning and drying to obtain the N-phenyl-N-trichloromethylthio benzenesulfonamide. According to the present invention, the reaction system of the specific catalyst 4-dimethylaminopyridine and the aqueou