第 43 卷第 2 期Vol. 43 No. 2
2013 年 4 月Apr 2013

所属栏目:医药及中间体

一锅法合成2-(3-乙氧基-4-正癸氧基苯胺基)亚甲基丙二酸二乙酯
李志华 (湖南中医药高等专科学校 药学系,湖南 株洲 412012)
摘 要:以4-羟基-3-乙氧基苯胺为原料,先与乙氧亚甲叉丙二酸二酯缩合、再与溴癸烷成醚得到2-(3-乙氧基-4-正癸氧基苯胺基)亚甲基丙二酸二乙酯,总收率为89.2%。缩合反应在无溶剂条件下进行;癸烷基化反应通过加水催化,严格控制反应体系的含水量在2.0%~5.0%,不仅可以加快反应速率,而且提高了转化率,避免了催化剂使用,是一条适合生产的新合成工艺路线。
关键词:2-(3-乙氧基-4-正癸氧基苯胺基)亚甲基丙二酸二乙酯;4-羟基-3-乙氧基苯;合成
中图分类号:S859  文献标识码:A  文章编号:1009-9212(2013)02-0055-03
One-pot Synthesis of 3-Ethoxy-4-n-decyloxy-anilionmethylene-malonic Acid Diethyl Ester
LI Zhi-hua (Hunan Traditional Chinese Medical College,Zhuzhou 412012,China)
Abstract:3-Ethoxy-4-n-decyloxy-anilionmethylene-malonic was prepared from 4-hydroxy-5-ethoxyaniline via condensation and etherification in an overall yield of 89.2%. The condensation was conducted in solvent-free solution and the etherification was catalyzed by 2.0%~5.0% of water,which accelerated the reaction speed and increased the conversion. Furthermore,it avoided using the expensive catalyst such as NaI and KI. This novel synthesis route was suitable for large-scale production as it resulted in a simple work-up process and less usage of organic solvent.
Key words:3-Ethoxy-4-n-decyloxy-anilionmethylene-malonic acid diethyl ester;4-Hydroxy-5-ethoxyaniline;Synthesis
作者简介:李志华(1981-),女,湖南岳阳人,讲师,硕士,从事药物合成以及药品、食品分析工作。(E-mail:Lzh14084@tom.com)
收稿日期:2013-03-28