Stereoselective Synthesis of 2α-Chloropicropodophyllotoxins and Insecticidal Activity of Their Esters against Oriental Armyworm, <i>Mythimna separata</i> Walker
作者:Lingling Fan、Yong Guo、Xiaoyan Zhi、Xiang Yu、Hui Xu
DOI:10.1021/jf405316w
日期:2014.4.30
the stereoselective α-chlorination at the C-2 position of 2′(2′,6′)-(di)halogenopodophyllotoxin derivatives was first developed. Subsequently, a series of novel esters of 2α-chloro-2′(2′,6′)-(di)halogenopicropodophyllotoxin with modified C, D, and E rings of podophyllotoxin were smoothly obtained. Finally, all of the title compounds were tested against the pre-third-instar larvae of oriental armyworm
作为发现新的基于天然产物的杀虫剂的持续努力的一部分,在本研究中,一种在2'(2',6')-(di)的C-2位置进行立体选择性α-氯化的有效方法首次开发了卤代鬼臼毒素衍生物。随后,平稳地获得了一系列具有鬼臼毒素C,D和E环修饰的2α-氯-2'(2',6')-(二)卤代鬼臼毒素的新型酯。最后,对所有标题化合物进行了抗东方粘虫(Mythimna separata)三龄前幼虫的测试。沃克(Walker)的浓度为1 mg / mL。发现除了2'-卤素取代的E环外,在2'(2',6')-(二)卤代鬼臼毒素的C-2位的立体选择性α-氯化也与氯化试剂有关。特别是2α-氯-4α-(苯甲酰基)氧基-2'-氯鬼臼毒素(6e)和2α-氯-4α-(2-氯苯基酰基)氧基2'-溴鬼臼毒素(8f)显示出最有效的杀虫活性,最终死亡率> 60%。对于2α-氯-2'(2',6')-(二)卤代鬼臼鬼臼毒素的4α-(烷酰基)氧基衍