第 51 卷第 2 期Vol. 51 No. 2
2021 年 4 月Apr 2021

所属栏目:农药及中间体

三氟咪啶酰胺关键中间体的合成工艺研究
陈羽阳,蒋倩茜,罗晶玲,黄朋勉* (长沙理工大学 化学与食品工程学院,湖南 长沙 410000)
摘 要:以丙酮酸乙酯为原料,经过取代反应得到溴代丙酮酸乙酯(F1),优化条件下收率达到94.06%。2,3-二氯-5-(三氟甲基)吡啶经过取代反应得到2-氨基-3-氯-5-(三氟甲基)吡啶(F2),优化条件下收率达到87.12%。F1和F2 经过缩合反应得到8-氯-6-(三氟甲基)咪唑并[1,2-A]吡啶-2-羧酸乙酯(F3)。F2和F3 经1H NMR确证结构。该制备方法三废少、污染小、收率高,具有工业化应用前景。
关键词: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
中图分类号:S482.5+1  文献标识码:A  文章编号:1009-9212(2021)02-0023-04
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
基金项目:湖南省教育厅科学研究项目资助(20A019)。
作者简介:陈羽阳(2000—),女,湖南茶陵人,研究方向:有机合成(E-mail:c1203532887@126.com)。
联 系 人:黄朋勉,副教授,研究方向:药物与医药中间体(E-mail:280897806@qq.com)。
收稿日期:2021-04-12