4-BENZOYL ISOXAZOLES DERIVATIVES AND THEIR USE AS HERBICIDES

摘要

4 Benzoylisoxazole derivatives of formula(I), wherein R represents hydrogen or ester; R1 , alkyl, haloalkyl or optionally substituted cycloalkyl; R2 represents halogen, optionally halogenated alkyl, alkenyl or alkynyl; alkyl substituted by one or more groups -OR5; nitro, cyano, -CO2R5,-S(O)pR6,-O(CH2)mOR5, -COR5,-NR5R6,-N(R8)SOqR7,-CONR9R10 or -OR51; optionally substituted phenyl; R3 represents -S(O)qR7; X represents -N(R8)-; n represents zero or an integer from one to four, R5, R51 and R6 independently represent hydrogen, optionally halogenate alkyl, alkenyl or alkynyl; optionally substituted phenyl; or cycloalky; R7 represents alkyl, alkenyl or alkynyl optionally substituted by halogens; cycloalkyl; optionally substituted phenyl; or amino; R8 hydrogen; alkyl, alkenyl or alkynyl optionally substituted by halogens; cycloalkyl; optionally substituted phenyl; or alkoxy; m is 1, 2 or 3; p is 0, 1 or 2; and q is zero or two; and their use as herbicides is describe.