其中以加成反应最为关键，它不仅是最慢的过程，其收率的多少也决定了目的产品三氯吡啶醇钠含量的高低，是整个过程的关键步骤。
Among the three steps, Addition reaction is the crucial step in that it is not only the slowest process but also how much its yield decides stand or fall of content of trichloropyridinol sodium.
综述了毒死蜱及其中间体3，5，6 三氯吡啶2 酚（I）合成方法，重点介绍了吡啶氯化法生产I，分析了各种路线的利弊及工业化的前景。
Several preparation ways of chlorpyrifos and its key intermidate 3,5,6trichloro2pyridinone(I) have been summarized. Its emphasis on introduce the chlorination of pyridine to producing I.
2,3-二氯-5-三氟甲基吡啶是杀虫剂氯氟脲类合成农药的关键中间体。
2,3-Dichloro-5-trifluoromethylpridine is a key intermediate of synthesis pesticides of insecticide chlorfluazuron.
前言：2，3-二氯-5-三氟甲基吡啶是合成农药杀虫剂定虫隆、除草剂吡氟氯禾灵和杀菌剂氟啶胺的关键中间体。
Abstrat:2,3-Dichloro-5-trifluoromethylpridine is a key intermediate of synthesis pesticides of insecticide chlorfluazuron , herbicide haloxyfop and bactericide fluazinam .
研究了一种直接环合的方法，用2-氯-2氯甲基- 4-氰基丁醛与三氯氧磷反应来制备2-氯-5-氯甲基吡啶。
A synthetic method of direct cyclization was researched that 2-chloro-2-chloromethyl-4-cyanobutyraldehyde was reacted with phosphorus oxychloride to get 2-chloro-5-chloromethylpyridine.
快速检测3，5，6-三氯二吡啶醇残留的胶体金试纸。
Gel gold test paper for quick inspecting remained 3,5,6-trichlorodipyridine-one.
快速检测3，5，6-三氯二吡啶醇残留的胶体金试纸。
Gel gold test paper for quick inspecting remained 3,5,6-trichlorodipyridine-one.
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