| 摘要 |
NEW MATERIAL:A compound shown by formula I [R is H, alkyl or (substituted) phenyl; R<1>-R<5> are H, halogen, (substituted)alkyl, alkoxy, alkylthio, OH, NO2, etc.,; R<6> is H, (substituted)alkyl or (substituted)phenyl; n is O or positive integer)]. EXAMPLE:alpha-( 3, 5, 6-Trichloro-2-pyridyloxy )acetic acid-N-(1',3'-dimethyl-5'-pyrazo lyl)amide. USE:A herbicide showing improved selective herbicidal activity and fungicide. PREPARATION:For example, a pyrazole derivative shown by formula II is reacted with a carboxylic acid halide shown by formula III (X is halogen) in an organic solvent in the presence of a hydrogen halide scavenger (e.g., trimethylamine or sodium carbonate) at -20-150 deg.C to give a compound shown by formula I. |
