Synthesis and stereostructure–activity relationship of three asymmetric center pyrethroids: 2-methyl-3-phenylcyclopropyl-methyl 3-phenoxybenzyl ether and cyanohydrin ester
作者:Yoshinori Nishii、Nobuo Maruyama、Kazunori Wakasugi、Yoo Tanabe
DOI:10.1016/s0968-0896(00)00217-0
日期:2001.1
2-Methyl-3-phenylcyclopropylmethyl 3-phenoxybenzyl ether 2 and cyanohydrin ester 3, a couple of pyrethroids with three asymmetric centers, were synthesized. Of each of the four diastereomers of 2 and 3, only the (1R*,2R*,3R*)-2a and 3a showed significant insecticidal activities. Dual sets of enantiomers [(1R,2R,3R)-(-)-2a and (1S,2S,3S)-(+)-2a] and [(1R,2R,3R)-(-)-3a and (1S,2S,3S)-(+)-3a] were synthesized
合成了2-甲基-3-苯基环丙基甲基3-苯氧基苄基醚2和氰醇酯3,这是一对具有三个不对称中心的拟除虫菊酯。在2和3的四个非对映异构体中,只有(1R *,2R *,3R *)-2a和3a表现出显着的杀虫活性。两组对映异构体[(1R,2R,3R)-(-)-2a和(1S,2S,3S)-(+)-2a]和[(1R,2R,3R)-(-)-3a和(使用Aratani催化剂通过不对称环丙烷化合成1S,2S,3S)-(+)-3a]。在对烟草鳞茎(Spodoptera litura)和普通蚊子(Culex pipiens pallens)的对映异构体之间均观察到明显的杀虫活性分离。(1S,2S,3S)-(+)-2a和(+)-3a的活性高于对映体(1R,2R,3R)(-)-2a和(-)-3a。