Heterocyclic herbicides.

摘要

Compound of the general formula (I) <CHEM> wherein X, Y and Z, which may be the same or different, each represents hydrogen, halogen, alkyl, haloalkyl, hydroxy, alkoxyalkyl, alkoxy, haloalkoxy, cycloalkyl, optionally substituted aryl, alkylthio, arylthio, optionally substituted amino or a group -CO2R<7>, wherein R<7> is hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted aryl or optionally substituted aralkyl, or X and Y together or Y and Z together represent a divalent group forming, together with the carbon atoms to which they are attached, a ring structure; R<1> represents a group -A-CH=CHCH3,-A-C IDENTICAL CCH3 , -A-CH2CH=CH2, -A-CH2C IDENTICAL CH, -A(CH2)nBR, -A(CH2)nB(CH2)mBR, <CHEM> or -A(CH2)nR<8>, optionally substituted at any chain or ring carbon atom, wherein A and B independently represent -0-, -S- or -NR, B<1> represents a direct bond, -O-, -S- or -NR n and m are integers from 1 to 3, p is 0, 1 or 2, R is hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted aryl or optionally substituted aralkyl and R<8> is optionally substituted aryl; R<2> to R<4>, which may be the same or different, each represent hydrogen, halogen, alkyl, alkoxy or -CO2R<7>, wherein R<7> is as herein defined; R<5> is hydrogen, halogen, alkyl, haloalkyl, optionally substituted cycloalkyl, optionally substituted aryl, nitro, cyano, hydroxy, optionally substituted alkoxy, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted amino optionally substituted alkylthio, optionally substituted alkylsulphinyl, optionally substituted alkylsulphonyl, optionally substituted arylthio, optionally substituted arylsulphinyl, optionally substituted arylsulphonyl, oximino, oxime, oxime ether, -CO2R<7>, -CONR7_2, -SO3R<7>, -SO2NR7_2, optionally substituted acyl, optionally substituted arylcarbonyl, <CHEM> or has the same meaning as R, wherein R<7> is as herein defined and R<9> is hydrogen, alkyl, acyl, arylcarbonyl or aralkyl; and R<6> is hydrogen, acyl, arylcarbonyl, alkylsulphonyl, arylsulphonyl or alkyl, subject to the proviso that R<1> does not represent -SCH2CH=CH2 when Y and R<2> to R<5> are hydrogen and X and Z are methyl, or a salt thereof, and their use in preventing or combating undesired plant growth at a locus.