Synthesis, Crystal Structure and Fungicidal Activity of Novel 1,5-Diaryl-3-benzoyloxy-1H-pyrazoles
作者:Yuan-Yuan Liu、Yi Li、Hong-Jun Zhu、Kai Chen、Bin Huang、Ya-Ping Yang
DOI:10.14233/ajchem.2014.16460
日期:——
Seven novel 1,5-diaryl-3-benzoyloxy-1H-pyrazoles (2a-2g) were prepared by the DCC condensation of 1,5-diaryl-1H-pyrazol-3-ols (1a-1g) with benzoic acid. Their structures were characterized by elemental analysis, IR, 1H NMR and mass spectral data. The structure of 5-(3,4-dimethoxyphenyl)-1-phenyl-3-benzoyloxy-1H-pyrazole (2d) was also determined by single crystal X-ray diffraction analysis. Bioassay results indicated that the compounds 5-(4-fluorophenyl)-1-phenyl-3-benzoyloxy-1H-pyrazole (2f) and 1,5-diphenyl-3-benzoyloxy-1H-pyrazole (2a) exhibited excellent-to-medium fungicidal activity against Sclerotinia sclerotiorum at a dosage of 10 μg/mL. The structure-activity relationships (SAR) were also discussed
通过 1,5-二芳基-1H-吡唑-3-醇(1a-1g)与苯甲酸的 DCC 缩合反应,制备了七种新型 1,5-二芳基-3-苯甲酰氧基-1H-吡唑(2a-2g)。通过元素分析、红外光谱、1H NMR 和质谱数据对它们的结构进行了表征。此外,还通过单晶 X 射线衍射分析确定了 5-(3,4-二甲氧基苯基)-1-苯基-3-苯甲酰氧基-1H-吡唑(2d)的结构。生物测定结果表明,5-(4-氟苯基)-1-苯基-3-苯甲酰氧基-1H-吡唑(2f)和 1,5-二苯基-3-苯甲酰氧基-1H-吡唑(2a)化合物在 10 μg/mL 的剂量下对硬菌具有极佳至中等的杀菌活性。还讨论了结构-活性关系(SAR)