Compounds of the formula
wherein X1, X2 and X3 each independently represents hydrogen, halogen or alkyl; n is 0 or 1; Z represents hydrogen or halogen or an amino, alkyl, haloalkyl, alkylthio or alkoxy group or a phenoxy group optionally substituted by haloalkyl; A represents CH or N; Y1 and Y2 each independently represents hydrogen, halogen, alkyl, haloalkyl, alkoxy or haloalkoxy; and W represents hydrogen or, or when A is CH and at least one of Y1 and Y2 is not hydrogen or when A is N, hydrogen or halogen; with the proviso that when A represents N, then each of Y1 and Y2 represents hydrogen, have herbicidal properties. The invention also provides a process for their preparation and their use as herbicides.
式中的化合物
其中 X1、X2 和 X3 各自独立地代表氢、卤素或烷基;n 为 0 或 1;Z 代表氢或卤素或
氨基、烷基、卤代烷基、烷
硫基或烷氧基或任选被卤代烷基取代的苯氧基;A 代表 CH 或 N;Y1和Y2各自独立地代表氢、卤素、烷基、卤代烷基、烷氧基或卤代烷氧基;W代表氢或,或当A为CH且Y1和Y2中至少有一个不是氢时,或当A为N时,代表氢或卤素;但当A代表N时,则Y1和Y2各自代表氢,具有除草特性。本发明还提供了制备它们和将它们用作
除草剂的工艺。