A series of diarylpyrazolecarboxylates and carboxamides were prepared, and their herbicidal activities were investigated. Some of these compounds showed noticeable pre-emergent herbicidal activities against various kinds of weeds. Among the synthesized compounds, methyl 4-chloro-1-(2, 5-difluorophenyl)-5-(4-flurophenyl)-pyzazole-3-carboxylate 19t exhibited good activity. Diarylimidazolecarboxylates and carboxamides were also synthesized, but they did not show any herbicidal activities.
制备了一系列二芳基
吡唑羧酸盐和羧酰胺,并研究了它们的除草活性。其中一些化合物对各种杂草具有明显的萌前除草活性。在合成的化合物中,4-
氯-1-(2, 5-二
氟苯基)-5-(4-
氟苯基)-哒唑-3-
羧酸甲酯 19t 表现出良好的活性。还合成了二
咪唑羧酸盐和羧酰胺,但它们没有显示出任何除草活性。