3,4,N-Trisubstituted-4,5-dihydro-1H-pyrazole-1-carboxamides and their use as insecticides
申请人:DOWELANCO
公开号:EP0508469A1
公开(公告)日:1992-10-14
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.
3,4,N-三芳基-4,5-二氢-1H-吡唑-1-甲酰胺化合物,其 4 位上的芳基是任选取代的吡啶基、嘧啶基、哒嗪基、吡嗪基或喹啉基,3 位和 N 位上的芳基是任选取代的苯基、制备了 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-甲酰胺等具有杀虫功效的化合物。1,2-Diarylethanone 化合物经双(二甲基氨基)甲烷处理后转化为 1,2-diaryl-2-propen-1-one 化合物,1,2-diaryl-2-propen-1-one 化合物经肼处理后转化为 3,4-diaryl-4,5-dihydro-1H-pyrazole 化合物,3,4-diaryl-4,5-dihydro-1H-pyrazole 化合物经芳基异氰酸酯处理后转化为杀虫主题化合物。