Synthesis of Novel Oxime Sulfonate Derivatives of 2′(2′,6′)-(Di)chloropicropodophyllotoxins as Insecticidal Agents
作者:Rong Wang、Xiaoyan Zhi、Jie Li、Hui Xu
DOI:10.1021/acs.jafc.5b02036
日期:2015.8.5
of the chlorine atom at the C-2′ or C-2′,6′ position on the E ring of picropodophyllotoxin or oxime sulfonate derivatives of picropodophyllotoxin was important for the insecticidal activity and introduction of a halogen (e.g., fluorine, chlorine, or bromine) atom-substituted phenylsulfonyl group on the oxime fragment of 2′(2′,6′)-(di)chloropicropodophyllones could lead to more promising compounds.
为了发现新型的基于天然产物的农药,我们通过鬼臼毒素的结构修饰制备了一系列2'(2',6')-(Di)chloropicropodophyllotoxins肟肟衍生物。它们的结构通过质子核磁共振(1 H NMR),高分辨率质谱(HRMS),旋光度和熔点得到很好的表征。此外,通过单晶X射线衍射明确地确定了化合物5f的关键空间结构。此外,针对典型的鳞翅目害虫东方粘虫(Mythimna separata Walker)的三龄前幼虫,其杀虫活性被评估为1 mg / mL 。在所有衍生物中,化合物4c,5c和与前体鬼臼毒素和阳性对照太生丹宁相比,5d表现出更有希望的杀虫活性,最终死亡率大于60%。结果表明,在鬼臼毒素的E环的C-2'或C-2',6'位置引入氯原子或鬼臼毒素的肟磺酸酯衍生物对杀虫活性和卤素(例如氟)的引入都很重要。 2'(2',6')-(di)chloropicropodophyllon