| 摘要 |
4-Benzoylisoxazole derivatives of formula (I): (I) wherein: R represents hydrogen or -CO2R4; R1 represents alkyl, haloalkyl or optionally substituted cycloalkyl; R2 represents halogen, alkyl, haloalkyl or alkyl substituted by -OR5, or a group selected from nitro, cyano, -COR4, -S(O)pR6, -O(CH2)rOR5 and -OR5; R3 represents optionally substituted phenyl; X represents oxygen or -S(O)q-; n represents zero or an integer from one to four; R4 and R5 independently represent alkyl or haloalkyl; R6 represents alkyl, haloalkyl or optionally substituted phenyl; R7 represents halogen, alkyl or haloalkyl or a group selected from nitro, cyano, -OR5 and -S(O)pR6; p represents 0, 1 or 2; q represents 0, 1 or 2; r represents 1, 2 or 3; the herbicidal properties of these derivatives and their application to crop protection is described.
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