Method for synthesizing high-purity azoxystrobin

The invention relates to a method for synthesizing high-purity azoxystrobin. The azoxystrobin is obtained through reaction of pyrimidine chloride and o-cyanobenzyl phenol under the action of alkali. The method comprises the following steps of: in a reaction vessel, adding reaction solvent, dehydrating agent and the o-cyanobenzyl phenol through inert gas shielding; stirring at room temperature, adding the pyrimidine chloride and phase transfer catalyst, and reacting for 3 hours after heating up to 50-110 DEG C; and filtering, decompressing and concentrating the filtrate to recover methylbenzene, adding methyl alcohol to dissolve, cooling to be 4 DEG C for crystallizing, and filtering to obtain the azoxystrobin. The method has the characteristic of high synthesis total recovery, and an easy-to-get and safe chemical reagent is used, so that the synthesizing process is more environmental-friendly and is safe to operate.