第 38 卷第 6 期Vol. 38 No. 6
2008 年 12 月Dec 2008

所属栏目:医药及中间体

2-(4-溴甲基苯基)丙酸合成
刘志雄1,程清蓉2,章爱华1 (1. 吉首大学 化工学院,湖南 吉首 416000;2. 武汉工程大学 化学与制药学院,湖北 武汉 430074)
摘 要:以甲苯为原料,经Friedel-Crafts、Willgerodt-Kindler-水解“一锅法”,单甲基化和溴代反应合成了洛索洛芬的关键中间体2-(4-溴甲基苯基)丙酸。结果表明:超声波能促进Friedel-Crafts、Willgerodt-Kindler水解反应,使用复合相转移催化剂可得高收率的单基化产物。该合成路线操作简便、原料易得,总收率55.1%。
关键词:2-(4-溴甲基苯基)丙酸;傅克反应;Willgerodt-Kindler法;单甲基化;溴代
中图分类号:O623.76  文献标识码:A  文章编号:1009-9212(2008)06- 0032-03
Synthesis of 2-(4-Bromomethylphenyl)propionic Acid
LIU Zhi-xiong1,CHENG Qing-rong2, ZHANG Ai-hua1 (1. College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China;2. School of Chemical Engneering and Pharmacy,Wuhan Institute of Chemical Technology,Wuhan 430073,China)
Abstract:2-(4-Bromomethylphenyl)propionic acid which was a key intermediate of loxoprofen was synthesized from toluene through four reaction steps including Friedel-Crafts reaction,Willgerodt-Kindler-hydrolysis,monomethylation and bromination. The results showed that the reaction process of Friedel-Crafts and Willgerodt-Kindler-hydrolysis was promoted via ultrasonic,high-yield of ɑ-monomethylation product was obtained by complex phase transfer catalysisis,and overall yield was 55.1%,indicating that this was an efficient synthetic route with convenient operations and available reagents.
Key words:2-(4-bromomethylphenyl)propionic acid;Friedel-Crafts;Willgerodt-Kindler;ɑ-monomethylation;bromination
作者简介:刘志雄(1973-),男,湖南新化人,讲师,从事化学工程和工艺的教学与研究。(E-mail:liuzhxi@sina.com)
收稿日期:2008-11-12