1前言吡啶类农药作为全球第四代新型农药,优势明显。含吡啶环农药不仅高效、低毒、持效期长,而且对人及生物有良好的环境相容性,符合农药的发展要求和趋势,且吡啶及其衍生物是合成农药、医药的重要中间体。由于吡啶替代苯环而得到的新化合物往往具有更高的生物活性或更低的毒性,近几年来,人们用各种杂环特别是用吡啶基团替代已有品种分子结构中的苯环或是在已知的含吡啶 1 Introduction Pyridine pesticides as the fourth generation of new pesticides worldwide, obvious advantages. Pyridine ring containing pesticides is not only efficient, low toxicity, long duration, but also to humans and organisms have good environmental compatibility, in line with the requirements and trends of the development of pesticides, and pyridine and its derivatives are synthetic pesticides, medicine, an important intermediate body. In recent years, many heterocyclic compounds, especially pyridine, have been used to replace the benzene rings in the molecular structure of the existing varieties or the new compounds obtained from the substitution of pyridine for the benzene ring have the higher biological activity or lower toxicity Is known to contain pyridine