4-BENZOYL ISOXAZOLES AND THEIR USE AS HERBICIDES

摘要

The invention relates to novel 4-benzoylisoxazole derivatives of formula (I), wherein: R represents hydrogen or -CO2R<5>; R<1> represents alkyl; cyclopropyl or 1-methylcyclopropyl; R<2> represents chlorine, bromine, optionally substituted alkyl, alkoxy, haloalkoxy, -S(O)pR<61>, nitro or cyano; R<3> represents -S(O)nR<6>; R<4> represents hydrogen, fluorine, chlorine, bromine, optionally substituted alkyl, alkoxy, haloalkoxy, -S(O)qR<61>, nitro, cyano or -CO2R<52>; R<5> and R<61>, which may be the same or different, each represents alkyl or haloalkyl; R<51> represents alkyl or haloalkyl; R<52> represents alkyl; R<6> represents alkyl, alkenyl or alkynyl optionally substituted by one or more halogens; n, p and q, which may be the same or different, each represents zero, one or two; and their use as herbicides.