丁醚脲-脲的制备工艺

范文编号:ZY040    范文字数:7564,页数:29

 摘 要：丁醚脲是一种新型硫脲杀虫，杀螨剂。丁醚脲对菜青虫、小绿叶蝉等多种害虫、害螨均有较好的防治效果。丁醚脲-脲是杀虫剂丁醚脲中的一种杂质。为了更好的的检测出丁醚脲中的丁醚脲-脲，制备高纯度的丁醚脲-脲作为参照物。本范文以2,6-二异丙基苯胺为原料，与溴反应制备4-溴-2,6-二异丙基苯胺；在氢氧化钾和氯化亚铜的作用下4-溴-2,6-二异丙基苯胺再与苯氧基置换得到4-苯氧基-2,6-二异丙基苯胺，利用减压蒸馏提纯4-苯氧基-2,6-二异丙基苯胺；将提纯的4-苯氧基-2,6-二异丙基苯胺依次与固体光气和叔丁胺反应生成N-叔丁基-N’-(2,6-二异丙基苯基-4’-苯氧基)尿素，即丁醚脲-脲，纯度为99.43%。

关键词：丁醚脲；丁醚脲-脲；2,6-二异丙基苯胺；固体光气

Abstract: Diafenthiuron was one new thiourea insecticide and miticide. Diafenthiuron can control and kill Pieris rapae, leafhopper and other pests, mites. Diafenthiuron-urea was an impurity in the preparation of Diafenthiuron. In order to detect Diafenthiuronur-ea in Diafenthiuron better. Prepared high-purity Diafenthiuron-urea as a reference. In this article, Diafenthiuron-urea was synthesized from 2,6–Diisopropylaniline. Prepared 4-bromo-2,6-Diisopropylaniline with bromine; 4-bromo-2,6-Diisopropylaniline was converted to 4-phenol-2,6–Diisopropylaniline by treatment with phenol, cuprous chloride and potassium hydroxide in xylene, and got the pure 4-phenol-2,6–Diisopropylaniline through vacuum distillation; Under the action of triphosgene and tert-butylamine, the pure 4-phenol-2,6–Diisopropylaniline can converted to N-tert-butyl-N’-(2,6-diisopropylphenyl- 4'-phenoxy) urea, also called Diafenthiuron–urea，a purity of 99.4%.

Keywords：Diafenthiuron; Diafenthiuron - urea; 2,6 - Diisopropylaniline; triphosgene

目  录
中文摘要 I
英文摘要 II
目录 III
1. 绪论 1
 1.1  丁醚脲的简介 1
 1.2  丁醚脲-脲的简介 5
2. 实验部分 7
 2.1  试剂和仪器 7
 2.2  实验合成 8
3. 结果与讨论 12
 3.1  2,6-二异丙基苯胺的气相色谱分析 12
 3.2  4-溴-2,6-二异丙基苯胺的气相色谱分析 14
 3.3  4-苯氧基-2,6-二异丙基苯胺的气相色谱分析 15
 3.4  丁醚脲-脲的液相色谱分析 17
 3.5  丁醚脲-脲的红外光谱分析 19
 3.6  实验探讨 21
4．总结与展望 22
 4.1  总结 22
 4.2  展望 22
致谢 23
参考文献 24

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