| abstract |
Carboxylic derivatives of benzoheterocyclylpyridines and benzoheterocyclylpyrimidines of the general formula (1) and their use as herbicides are described. Claim 1: Compounds of the formula (1), their N-oxides or their salts, A means a remainder of the group which composes of the compounds of formula (A1) to (A20); R1 means hydrogen or C1-4 alkyl; R2 means chlorine; R3 means hydrogen; R4 means hydrogen; R5 means hydrogen, halogen, OH, NH2, CN, C1-3 alkyl, C1-3 alkoxy, C1-3 alkylamino or cyclopropyl; R6 means hydrogen, halogen, OH, NH2, CN, C1-3 alkyl, C1-3 alkoxy, cyclopropyl or vinyl; R7 means hydrogen, halogen, C1-3 alkyl, C1-3 alkoxy, C1-3 alkylthio, cyclopropyl, C1-3 alkylamino or phenyl; R8 means hydrogen, C1-3 alkyl, phenyl or C1-3 alkylcarbonyl; X means N, CH, CCI, CF or CBr; n means 0, 1 or 2. |