Developing novel fungicide candidates are intensively promoted by the rapid emergences of resistant fungi that outbreak on agricultural production. Aiming to discoverynovelantifungalleads, a series of 1,3,4-oxadiazole derivatives bearing a quinazolin-4(3H)-one fragment were constructed for evaluating their inhibition effects against phytopathogenic fungi in vitro and in vivo. Systematically structural
农业生产中爆发的抗性真菌的迅速出现,极大地促进了新型杀菌剂候选物的开发。为了发现新的抗真菌先导物,构建了一系列带有 quinazolin-4(3 H )-one 片段的 1,3,4-恶二唑衍生物,用于评估它们在体外和体内对植物病原真菌的抑制作用。生成系统的结构的优化的生物活性分子余32所识别作为对有希望的抑制剂纹枯病与体内200 μg/mL 时的预防效果为 58.63%。扫描电镜和透射电镜观察表明,生物活性分子I 32可以诱导菌丝的蔓延生长、菌丝表面的局部收缩和破裂、液泡的极度膨胀、细胞壁的显着变形、以及线粒体数量的减少。上述结果为发现带有喹唑啉-4(3 H )-one 和1,3,4-恶二唑片段的抗真菌先导物提供了不可或缺的补充。
Synthesis and Biological Activity of 1-(Substituted phenoxyacetoxy)-1-(pyridin-2-yl or thien-2-yl)methylphosphonates
作者:Tao Wang、Wei Wang、Hao Peng、Hongwu He
DOI:10.1002/jhet.1944
日期:2015.1
A series of novel O,O‐dimethyl 1‐(substituted phenoxyacetoxy)‐1‐(pyridin‐2‐yl or thien‐2‐yl)methylphosphonates 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j, 6k, 6l, 6m, 6n and 7a, 7b, 7c, 7d were synthesized. Their structures were confirmed by IR, 1H NMR, mass spectroscopy, and elemental analyses. The results of preliminary bioassays show that some of the title compounds exhibit moderate to good herbicidal
一系列新颖的O,O-二甲基1-(取代的苯氧基乙酰氧基)-1-(吡啶-2-基或噻吩-2-基)甲基膦酸酯6a,6b,6c,6d,6e,6f,6g,6h,6i,合成了6j,6k,6l,6m,6n和7a,7b,7c,7d。其结构已通过IR确认11 H NMR,质谱和元素分析。初步生物测定的结果表明,某些标题化合物具有中等至良好的除草和杀真菌活性。例如,标题化合物6a,6c,6l,6m和7d在1500 g ai / ha的剂量下对大多数受试植物具有90-100%的抑制作用,而标题化合物6b,6g,6h和6n具有抑制作用针对92-100%抑制尖镰孢,Phyricularia菌,葡萄孢属cinereapers,玉蜀黍赤霉,浓度为50 mg / L的核盘菌菌核病菌(Sclerotinia sclerotiorum)和锥尾核孢菌(Cercospora beticola)。
Synthesis and Biological Activity of α -Oxo-2-Pyridyl Methyl Phosphinates
作者:Tao Wang、Hong Wu He
DOI:10.1080/10426500701792974
日期:2008.7.4
In an attempt to discover novel compounds with high activity and low toxicity, a series of new O,O-dimethyl-alpha-(substituted phenoxyacetoxy)-2-pyridyl methyl phosphinates, 5a-5h, have been designed and synthesized by the reaction of substituted phenoxyacetic chloride with 1-hydroxy-2-pyridyl methyl phosphinate, The structures of all new compounds were characterized by elementary analysis, IR, (1)H NMR, and MS spectroscopies. The results of preliminary bioassay indicate that most of the target compounds have excellent inhibitory activities on barnyard grass and rape.
The synthesis and evaluation of phenoxyacylhydroxamic acids as potential agents for Helicobacter pylori infections
Two series of omega-phenoxy contained acylhydroxamic acids as novel urease inhibitors were designed and synthesized. Biological activity evaluations revealed that co-phenoxypropinoylhydroxamic acids were more active than phenoxyacetohydroxamic acids. Out of these compounds, 3-(3,4-dichlorophenoxy)propionylhydroxamic acid c24 showed significant potency against urease in both cell free extract (IC50 = 0.061 +/- 0.003 mu M) and intact cell (IC50 = 0.89 +/- 0.05 mu M), being over 450- and 120-fold more potent than the clinically prescribed urease inhibitor AHA, repectively. Non-linear fitting of experimental data (V-[S]) suggested a mixed-type inhibition mechanism and a dual site binding mode of these compounds.