第 51 卷第 2 期 |  | Vol. 51 No. 2 | 2021 年 4 月 | Apr 2021 |
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所屬欄目:農藥及中間體
三氟咪啶酰胺關(guān)鍵中間體的合成工藝研究 |
陳羽陽(yáng),蔣倩茜,羅晶玲,黃朋勉*
(長(cháng)沙理工大學(xué) 化學(xué)與食品工程學(xué)院,湖南 長(cháng)沙 410000) |
摘 要:以丙酮酸乙酯為原料,經(jīng)過(guò)取代反應得到溴代丙酮酸乙酯(F1),優(yōu)化條件下收率達到94.06%。2,3-二氯-5-(三氟甲基)吡啶經(jīng)過(guò)取代反應得到2-氨基-3-氯-5-(三氟甲基)吡啶(F2),優(yōu)化條件下收率達到87.12%。F1和F2 經(jīng)過(guò)縮合反應得到8-氯-6-(三氟甲基)咪唑并[1,2-A]吡啶-2-羧酸乙酯(F3)。F2和F3 經(jīng)1H NMR確證結構。該制備方法三廢少、污染小、收率高,具有工業(yè)化應用前景。
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關(guān)鍵詞:三氟咪啶酰胺;溴代丙酮酸乙酯;2-氨基-3-氯-5-(三氟甲基)吡啶;8-氯-6-(三氟甲基)咪唑并[1,2-A]吡啶-2-羧酸乙酯 |
中圖分類(lèi)號:S482.5+1 文獻標識碼:A 文章編號:1009-9212(2021)02-0023-04 |
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Synthesis of the Key Intermediates of Triflumidin Amide |
CHEN Yu-yang, JIANG Qian-qian, LUO Jing-ling, HUANG Peng-mian*
(Changsha University of Science and Technology, College of Chemical and Food Engineering, Changsha 410000, China) |
Abstract:Ethyl bromopyruvate(F1) was synthesized from ethyl pyruvate through a substitution reactionwith a yield of 94.06% under the optimum conditions. 3-Chloro-5-(trifluoromethyl)pyridin-2-amine(F2) was obtained through a substitution reaction of 2,3-dichloro-5-(trifluoromethyl)pyridine in a yield of 87.12%. F1 and F2 were reacted to give 8-chloro-6-(trifluoromethyl)imidazo[1,2-A]pyridine-2-carboxylate (F3). The structures of F2 and F3 were confirmed by 1H NMR. This preparation method had the advantages including less waste, less pollution and high yield with a prospect of industrial application. |
Key words:fluazaindolizine; ethyl bromopyruvate; 3-chloro-5-(trifluoromethyl)pyridin-2-amine; ethyl 8-chloro-6-(trifluoromethyl)imidazo[1,2-A]pyridine-2-carboxylate |
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基金項目:湖南省教育廳科學(xué)研究項目資助(20A019)。
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作者簡(jiǎn)介:陳羽陽(yáng)(2000—),女,湖南茶陵人,研究方向:有機合成(E-mail:c1203532887@126.com)。
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聯(lián) 系 人:黃朋勉,副教授,研究方向:藥物與醫藥中間體(E-mail:280897806@qq.com)。
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收稿日期:2021-04-12
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