新拟除虫菊酯２－甲基－２－戊烯基－２，２－二甲基－３－（２＇，２＇－二氯乙烯基）－环丙烷羧酸酯的合成工艺周廷森，周有骏，王元正，唐赟天然除虫菊酯的应用历史悠久，其特点是击倒力强，速效，广谱，易降解，对高等动物及鸟类毒性低，使用安全，不污染环境；但由于... Synthesis of Novel Pyrethroid 2-Methyl-2-pentenyl 2,2-dimethyl-3- (2 ’, 2’-dichloroethenyl) -cyclopropanecarboxylate ZHOU Tingsen, Wang Yuanzheng, Tang Yun natural pyrethrins have a long history of application, which is characterized by strong knockdown, quick-acting, broad-spectrum, easy degradation, high toxicity to animals and birds low, safe to use, does not pollute the environment;