| abstract |
Novel pyridine and pyrimidine derivatives of general formula (1):n n n n n n n n Wherein A represents an optionally substituted aryl group or an optionally substituted heteroaromatic group or difluorobenzodioxylyl group containing 5- or 6-membered nitrogen;n n n m represents an integer of 0-5;n n n n represents an integer of 0-2;n n n R 1 (or each R 1 ) is independently a hydrogen atom, a halogen atom, optionally substituted alkyl, alkenyl, alkynyl, alkoxy, alkoxyalkyl, dialkoxyalkyl, alkoxyalkoxy, alkylthio, amino, alkylamino, di An alkylamino, alkoxyamino or formamidino group;n n n R 2 (or each R 2 ) is independently a hydrogen atom, a halogen atom, optionally substituted alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylsulfonyl or alkylsulfinyl group or nitro, cyano, haloalkyl, Haloalkoxy or haloalkylthio groups;n n n X represents an oxygen or sulfur atom; Andn n n Z represents a nitrogen atom or a CH group;n n n If A represents a 1-methyl-3-trifluoromethyl-pyrazol-5-yl group, n is 0, X represents an oxygen atom and Z represents a CH group, where R 2 represents hydrogen or 3-trifluoro Methyl or 2,4-dichloro or 2,4-dimethyl) may be prepared by conventional methods and are particularly useful as herbicides. |