申请人:DowElanco
公开号:US05250532A1
公开(公告)日:1993-10-05
3,4,N-triaryl-4,5-dihydro-1H-pyrazole-1-carboxamide compounds having an aryl moiety in the 4-position that is an optionally substituted pyridinyl, pyrimidinyl, pyridazinyl, pyrazinyl, or quinolinyl moiety and aryl moieties in the 3-position and the N-position that are optionally substituted phenyl, pyridinyl, pyrimidinyl, pyridazinyl, pyrazinyl, or quinolinyl moieties, such as N-(4-chlorophenyl)-4,5- -dihydro-3-(4-fluorophenyl)-4-(5-trifluoromethyl-2- -pyridinyl)-1H-pyrazole-1-carboxamide, were prepared and found to possess insecticidal utility. 1,2-Diarylethanone compounds were converted to 1,2-diaryl-2-propen-1-one compounds by treatment with bis(dimethylamino)methane, the 1,2-diaryl-2-propen-1-one compounds were converted to 3,4-diaryl-4,5-dihydro-1H-pyrazole compounds by treatment with hydrazine, and the 3,4-diaryl-4,5-dihydro-1H-pyrazole compounds were converted to the insecticidal subject compounds by treatment with an aryl isocyanate.
制备了一种在4位上具有取代的吡啶基、嘧啶基、吡嗪基、吡咯嗪基或喹啉基芳基部分,以及在3位和N位上具有取代的苯基、吡啶基、嘧啶基、吡嗪基、吡咯嗪基或喹啉基芳基部分的3,4,N-三芳基-4,5-二氢-1H-吡唑-1-羧酰胺化合物,例如N-(4-氯苯基)-4,5-二氢-3-(4-氟苯基)-4-(5-三氟甲基-2-吡啶基)-1H-吡唑-1-羧酰胺,并发现具有杀虫效用。将1,2-二芳基乙酮化合物通过与双(二甲氨基)甲烷反应转化为1,2-二芳基-2-丙烯-1-酮化合物,再通过与肼反应转化为3,4-二芳基-4,5-二氢-1H-吡唑化合物,最后通过与芳基异氰酸酯反应转化为所述杀虫活性化合物。