Synthesis,Crystal Structure and Insecticidal Activity of N-(pyridin-2-ylmethyl)-1-phenyl-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazole-3-carboxamide

The title compound N-(pyridin-2-ylmethyl)-1-phenyl-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazole-3-carboxamide 5(C_(21)H_(22)N_4O, Mr = 346.42) has been synthesized and structurally characterized by IR, ~1H NMR, ~(13)C NMR, H RMS and single-crystal X-ray diffraction. The crystal crystallizes in monoclinic system, space group P21/n with a = 8.668(2), b = 22.236(4), c = 9.539(2) ?, β = 108.68(3)°, V = 1786.4(7) ?3, Z = 4, Dx = 1.288 g/cm~(-3), F(000) = 736, μ(Mo Ka) = 0.649 mm~(-1), the final R = 0.0354 and w R = 0.0933 with 3234 observed reflections with I 2σ(I). The benzene and pyrazole rings are nearly coplanar with a dihedral angle of 50.977(46)°. The dihedral angle between the central pyrazole and pyridine rings is 11.688(46)°. No classical hydrogen bonds were found in the molecules. Two adjacent molecules in crystal packing of compound 5 were linked by two intramolecular hydrogen-bonding interactions C(15)–H(15)···O(1) to generate a stable structure. Compound 5 had weak insecticidal activity against the diamondback moth(Plutella xylostella), but exhibited good activity against cotton bollworm(Helicoverpa armigera).     

含肟酯基L-香芹酮衍生物的设计、合成、晶体结构及杀菌活性

L-香芹酮是一种具有杀菌活性的天然产物,可用作新型杀菌剂的先导化合物.因此,以L-香芹酮为先导化合物,采用活性亚结构拼接法合成了一系列含肟酯的L-香芹酮衍生物.化合物的结构经过红外,1H NMR,13C NMR和高分辨质谱确认.本研究还测定了这些化合物对油菜菌核真菌、小麦赤霉真菌、水稻稻瘟真菌、西瓜枯萎真菌和水稻纹枯真...