4-Benzoyl isoxazoles and their use as herbicides.

摘要

The invention relates to 4-benzoylisoxazole derivatives of formula (I): <CHEM> wherein: R represents the hydrogen atom or a group -CO2R<4>; R<1> represents alkyl, haloalkyl or optionally substituted cycloalkyl; R<2> represents halogen, optionally halogenated alkyl, alkenyl or alkynyl, alkyl substituted by one or more groups -OR<5>; or a group selected from nitro, cyano, -CO2R<5>, -S(O)pR<6>, -O(CH2)mOR<5>, -COR<5>, -NR<6><1>R<6><2>, -N(R<8>)SO2R<7>, -OR<5>, -OSO2R<7> and -(CR<9>R<1><0>)t-S(O)qR<7>; R<3> represents -S(O)qR<7>; X represents -(CR<9>R<1><0>)t-; n represents zero or an integer from one to four; R<4> represents alkyl or haloalkyl R<5> represents optionally halogenated alkyl, alkenyl or alkynyl; R<6>, R<6><1> and R<6><2>, which may be the same or different, each represents alkyl, haloalkyl or optionally substituted phenyl; R<7> represents optionally halogenated alkyl, alkenyl or alkynyl, or optionally subtituted phenyl or benzyl; R<8> represents hydrogen or optionally halogenated alkyl, alkenyl or alkynyl; R<9> and R<1><0>, which may be the same or different, each represents hydrogen, alkyl, haloalkyl or optionally substituted phenyl p represents zero, one or two; q represents zero, one or two; m represents 1, 2 or 3; t represents an integer from one to four; or an agriculturally acceptable salt thereof; and to their use as herbicides.