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氯氰菊酯是一种高效广谱安全的除虫菊酯类杀虫剂,主要用于防治棉花、果树、蔬菜等经济作物害虫,也可用作卫生杀虫剂。氯氰菊酯包含四个异构体对,即顺式α体、顺式β体、反式α体、反式β体。α体为高杀虫活性成份,β体为低效体,杀虫活性来自其α体。中国从国外进口的氯氰菊酯含45%α体和55%β体,每年花费数百万美元。1987年南开大学元素有机化学研究所发明一种新的差向异构化方法转化氯氰菊酯中的β体为α体,使α体含量由占原药的45%提高到93%,使药效提高一倍。1988年本发明技术在天津农药厂开发应用获得成功,开始生产高效
Cypermethrin is a highly effective and broad-spectrum safe pyrethroid insecticide, which is mainly used to control economic crop pests such as cotton, fruit trees and vegetables, and can also be used as a health insecticide. Cypermethrin contains four isomer pairs, namely cis-alpha, cis beta, trans alpha, trans beta. The α-body is a highly insecticidal active ingredient, the β-body is an inefficient body and the insecticidal activity is derived from its α-body. Cypermethrin imported from China contains 45% alpha and 55% beta and spends millions of dollars annually. 1987 年 Nankai University Institute of Element Organic Chemistry invented a new epimerization method cypermethrin transposon β body α body, so that α-body content from 45% of the original drug to 93%, so that the efficacy increased Double In 1988, the technology of the present invention was successfully developed and applied in Tianjin Pesticide Factory and started to produce highly efficient