The synthesis and biological evaluation of novel gardenamide A derivatives as multifunctional neuroprotective agents
作者:Zuzhi Zhang、Yujun Wang、Yanchun Zhang、Jiaming Li、Weijun Huang、Lei Wang
DOI:10.1039/c9md00211a
日期:——
novel series of gardenamide A derivatives was synthesized as potential anti-Alzheimer's disease agents. The neuroprotective effects of these multifunctional agentsagainst oxygen-glucose deprivation (OGD)-induced neurotoxicity in rat cortical neurons, and hydrogen peroxide (H2O2)- and amyloid-β1-42 (Aβ1-42)-induced neurotoxicity in rat hippocampal neurons were evaluated. In vitro studies revealed that
Biomimetic Synthesis of Iridoid Alkaloids as Novel Leads for Fungicidal and Insecticidal Agents
作者:Qing Xia、Hao Tian、Yufei Li、Xiang Yu、Weihua Zhang、Qingmin Wang
DOI:10.1021/acs.jafc.0c04885
日期:2020.11.11
solani (18 μg/mL, 15.7–20.8 μg/mL), and Botrytis cinerea (26 μg/mL, 22.4–30.4 μg/mL), thereby emerging as a potential new fungicidal lead. The structure–activity relationship research has shown that the electrical property and steric hindrance sizes of iridoid alkaloids apparently influence fungicidal activity. Moreover, compound 3n exhibited good insecticidal activity against diamondback moth with an LC50
单萜类生物碱以其广泛而优异的生物活性而闻名,但其含量极低且化学结构复杂,限制了它们的实际应用。这项研究使用生物合成的前体Genipin作为基本材料进行仿生生物体类环烯生物碱的合成。通过1 H和13 C NMR光谱和高分辨质谱法表征了类虹吸生物碱的结构,并评估了其杀真菌和杀虫活性。生物测定结果表明,鸢尾碱生物碱对植物病原真菌,小菜蛾,豆蚜和红蜘蛛具有良好至优异的活性。化合物3s对三种重要的植物病原真菌具有最有希望的活性禾谷镰刀菌(LC 50 34.5微克/毫升的值与33.4-35.5微克/毫升的95%置信区间),水稻纹枯病菌(18微克/毫升,15.7-20.8微克/毫升),和灰葡萄孢(26微克/毫升,22.4–30.4μg/ mL),从而成为潜在的新型杀菌剂。结构-活性关系研究表明,类环烷生物碱的电学性质和空间位阻大小显然影响杀真菌活性。此外,化合物3n的LC 50对小菜蛾显示出良好的杀虫活性。(35
Synthesis of Stable Genipin Derivatives and Studies of Their Neuroprotective Activity in PC12 Cells
C8, and C10 of genipin were conducted, and the neurotrophic effects of all derivatives were studied. Genipinderivatives 1–4 were obtained in mild to high yield. Compounds 1 and 4 are more stable than genipin if exposed to nucleophiles. All the derivatives display higher neurotrophic activities than genipin. Compound 4 is the most active, with the least optimal dose. Both genipin and 4 up‐regulated