5-ARYLMETHOXY PHENYL PYRAZOLE COMPOUNDS AND PREPARATION METHODS THEREOF

摘要

5-Arylmethoxy phenyl pyrazole compounds and their preparation methods are disclosed, which belong to the fields of herbicide technology and the preparation methods thereof. 5-Arylmethoxy phenyl pyrazole compounds which have herbicidal activities have the following chemical molecular structural formula (I): wherein X is chlorine or bromine atom; R is substituted dihydroisoxazolyl, substituted phenyl or anthryl. The said 5-arylmethoxy phenyl pyrazole compounds are prepared by the following steps: using substituted acetophenone as a raw material; synthesizing 3-(4-chloro-2-fluoro-5-methoxyl phenyl)-1-methyl-5-trifluoromethyl-1H-pyrazole as an intermediate by the steps of condensation, cyclization, alkylation and the like; and obtaining the serial compounds of 5-arylmethoxy phenyl pyrazole from the above-mentioned intermediate by the steps of halogenation, demethylation, etherification and the like. The herbicides No. 1, 2, 3, 7 and 12 etc. have high inhibition rates on Piemarker at a dose of 9.375, 37.5 or 150 g/hm2. Especially, The inhibition rate of the herbicide No. 7 reaches 95 percent at a dose of 9.375 g/hm2.