Synthesis and Herbicidal Activity of 1,5-Diarylpyrazole Derivatives.

Abstract

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.