Synthesis and Fungicidal Activity of Methyl N-methoxy-N- [2-(3-trifluoromethyl-1-substituted pyrazol-5-yloxymethylene)] phenylcarbamates

A series of novel methyl N-methoxy-N-[2-(3-trifluoromethyl)-1-substituted pyrazol-5-yloxylmethylene]phenylcarbamates were synthesized from 3-trifluoromethyl-1-substituted(pyrazolin)-5-one and methyl N-methoxy-N-(2-bromomethylphenyl)carbamates. All novel (compounds) were confirmed by ()~1H NMR,IR and LC/MS.The preliminary bioassays showed that some compounds had fungicidal activities to Pyricularia oryzae, Botrytis cinerea, and Erysiphe graminis under 50 mg/L,for example,the inhibitory ratio of compound IV_(13) to P. oryzae was 94%.