o-Fluorobenzoyl chloride

Preparation method of o-fluorobenzoyl chloride, including the following steps: (1) the synthesis of o-fluorobenzotrichlorobian: o-fluorotoluene and triethanol are mixed, heated, adding azodiisobutyronitrile, and starting to pass chlorine, to obtain the intermediate o-fluorobenzotrichlorobian; (2) the synthesis of o-fluorobenzoyl chloride: the o-fluorobenzotrichlorobian obtained in step (1) is obtained in a stirring condition, elevating the temperature and maintaining a micro-negative pressure, and starting to slowly drop 0.5% zinc chloride Aqueous solution of 0.5% zinc chloride, 3 hours; if the o-fluorobenzoyl chloride is not completely transformed, then make up drops of aqueous zinc chloride until the o-fluorobenzoyl chloride is completely transformed, purified by means of decompression distillation, collected 100 ~ 105 ℃ fractions, to obtain the o-fluorobenzoyl chloride. The preparation method of o-fluorobenzoyl chloride has the advantages of fewer steps, higher yield and higher purity.