氯氟氰菊酯

氯氟氰菊酯

CAS号:68085-85-8
英文名:cyhalothrin
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化合物简介
Cyhalothrin is an organic compound that is used as a pesticide. It is a pyrethroid, a class of man-made insecticides that mimic the structure and insecticidal properties of the naturally-occurring insecticide pyrethrum which comes from the flowers of chrysanthemums. Synthetic pyrethroids, like lambda-cyhalothrin, are often preferred as an active ingredient in insecticides because they remain effective for longer periods of time. It is a colorless solid, although samples can appear beige, with a mild odor. It has a low water solubility and is nonvolatile. It is used to control insects in cotton crops.
基本信息
编号系统
物化性质
安全信息
生产方法及用途
生产方法
先以二甲基戊烯酸甲酯为原料,与三氯三氟乙烷、过氧苯甲酸在催化剂存在下反应,反应产物与特丁醇钠在四氢呋喃溶剂中环合,再经皂化等处理得到1,2-二氯-3,3,3,3-三氟丙烯基-2,'2'-二甲基环丙羧酸。另在液碱、甲醇存在下,由间苯氧基苯甲醛与甲醛反应,得到间苯氧基苯甲醇,再与氰化钠溶液在酸性条件下反应制得α-氰基-间苯氧基苯甲醇。最后以氯化亚砜为氯化剂,使环丙羧酸形成环丙酰氯,然后在吡啶存在下,与α-氰基-间苯氧基苯甲醇制成氯氟氰菊酯。
用途
对多种鳞翅目幼虫有很好的杀灭效果,亦可有效地防治某些地下害虫,并对某些成虫有拒避作用