Semi-synthesis and insecticidal activity of spinetoram J and its D-forosamine replacement analogues
作者:Kai Zhang、Jiarong Li、Honglin Liu、Haiyou Wang、Lamusi A
DOI:10.3762/bjoc.14.207
日期:——
D-forosamine replacement analogues of spinetoram J were synthesized based on the improved semi-synthesis, and their insecticidal activities were evaluated against third-instar larvae of Plutella xylostella. Although none of the analogues were as potent as spinetoram, a few of the analogues have only a 20-40 times lower activity than spinetoram. In particular, one of these analogues was approximately as
多杀菌素是多杀菌素J(XDE-175-J,主要成分)和多杀菌素L(XDE-175-L)的混合物,是一种新型发酵源杀虫剂,对多种害虫特别是Cydia具有广泛的作用苹果属、潜叶蝇和蓟马。与多杀菌素类似,乙基多杀菌素对环境友好,对动物和人类无毒。因此,乙基多杀菌素在害虫防治和粮食储藏方面得到了广泛的应用。在之前的研究中,我们报道了乙基多杀菌素J的半合成,但该合成实验步骤较多,操作麻烦。因此,设计并讨论了一种基于自我保护策略的改进合成方法。在这项工作中,3-O-乙基-2,4-二-O-甲基鼠李糖既用作C9-OH的反应底物,又用作C17-OH的保护基。合成步骤数和成本显着减少。此外,在改进的半合成方法的基础上,合成了多种乙基多杀菌素J的D-forosamine替代类似物,并对其对小菜蛾三龄幼虫的杀虫活性进行了评价。尽管没有一种类似物的功效与乙基多杀菌素一样强,但少数类似物的活性仅比乙基多杀菌素低 20-40