Oxime ether acetate compound, preparation method therefor and weeding application thereof

Abstract

The present invention discloses an oxime ether acetate compound containing a phenylpyridine moiety of formula (I), whose preparation method is as follows: (1) mixing a compound of formula (IV), a compound of formula (V), an alkaline substance A, a palladium catalyst and a solvent A; subjecting the mixture to a reaction at the temperature ranging from −10° C. to the reflux temperature for 0.5-20 hours to obtain a reaction solution A; post-treating the solution A to obtain a compound of formula (II); (2) mixing the compound of formula (II), an alkaline substance B, a phase transfer catalyst and a solvent B; subjecting the mixture to a reaction at the temperature ranging from −10° C. to the reflux temperature for 0.1-2 hours; then adding a compound of formula (III), continuing to react at the temperature ranging from −10° C. to the reflux temperature for 0.5-20 hours to obtain a reaction solution B; and post-treating the solution B to obtain the compound of formula (I). The oxime ether acetate compound containing a phenylpyridine moiety of formula (I) can be used for weeding in crops.