第 38 卷第 5 期 |  | Vol. 38 No. 5 | 2008 年 10 月 | Oct 2008 |
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所屬欄目:農藥及中間體
一鍋法合成2,3-二氯吡啶 |
馮 忖1,2,李 惠2,3,毛春暉2,楊 彬2,陳 明2
(1. 華中師范大學(xué) 化學(xué)學(xué)院,湖北 武漢 430079;2. 湖南化工研究院 國家農藥創(chuàng )制工程技術(shù)研究中心,湖南 長(cháng)沙 410007;3. 湖南師范大學(xué) 化學(xué)化工學(xué)院,湖南 長(cháng)沙 410081) |
摘 要:2,3-二氯吡啶是新型殺蟲(chóng)劑氯蟲(chóng)苯甲酰胺的關(guān)鍵中間體。比較了2,3-二氯吡啶的各種合成方法,探索了一條以3-氨基吡啶為原料,經(jīng)過(guò)氯化、重氮化和sandmeyer反應,中間體不分離,一鍋法合成2,3-二氯吡啶的經(jīng)濟合理的路線(xiàn),收率66.9%,含量98%以上。對反應的機理進(jìn)行了探討,對副產(chǎn)物進(jìn)行了分離與表征。 |
關(guān)鍵詞:2,3-二氯吡啶;氯蟲(chóng)苯甲酰胺;一鍋法;合成機理 |
中圖分類(lèi)號:TQ253.2 文獻標識碼:A 文章編號:1009-9212(2008)05- 0019-03 |
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One-pot Synthesis of 2,3-Dichloropyridine |
FENG Cun1,2,LI Hui2,3,MAO Chun-hui2,YANG Bing2,CHEN Ming2
(1.Department of Chemistry,Central China Normal University,Wuhan 430079,China;2. Hunan Research Institute of Chemical Industry (Hunan Research Institute of Pesticide),Changsha 410007,China;3.College of Chemistry and Chemical Engineering Hunan Normal University,Changsha 410081,China) |
Abstract:2,3-Dichloropyridine is a key intermediate of a new insecticide chlorantraniliprole. Several synthesis routes of 2,3-dichloropyridine were evaluated in this paper,and therefore an economic and reasonable one-pot synthesis of 2,3-dichloropyridine was explored through chlorination,diazotization and sandmeyer reaction starting with 3-aminopyridine yield and purity of the product was 66.9% and 98% respectively. In additions of the mechanisms of reactions were studied and the by-products were separated and characterized. |
Key words:2,3-dichloropyridine;chlorantraniliprole;one-pot synthesis;mechanism of synthesis |
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作者簡(jiǎn)介:馮 忖(1983-),男,陜西延安人,碩士研究生,從事有機合成方面的研究。(E-mail:fengcun1983@163.com)
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聯(lián) 系 人:毛春暉(1966-),男,副研究員,博士,主要從事農藥及其中間體合成工藝研究。(E-mail:chmaocn@yahoo.com.cn)
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收稿日期:2008-09-20
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