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

所屬欄目:醫藥及中間體

2-(4-溴甲基苯基)丙酸合成
劉志雄1,程清蓉2,章愛(ài)華1 (1. 吉首大學(xué) 化工學(xué)院,湖南 吉首 416000;2. 武漢工程大學(xué) 化學(xué)與制藥學(xué)院,湖北 武漢 430074)
摘 要:以甲苯為原料,經(jīng)Friedel-Crafts、Willgerodt-Kindler-水解“一鍋法”,單甲基化和溴代反應合成了洛索洛芬的關(guān)鍵中間體2-(4-溴甲基苯基)丙酸。結果表明:超聲波能促進(jìn)Friedel-Crafts、Willgerodt-Kindler水解反應,使用復合相轉移催化劑可得高收率的單基化產(chǎn)物。該合成路線(xiàn)操作簡(jiǎn)便、原料易得,總收率55.1%。
關(guān)鍵詞:2-(4-溴甲基苯基)丙酸;傅克反應;Willgerodt-Kindler法;單甲基化;溴代
中圖分類(lèi)號:O623.76  文獻標識碼:A  文章編號: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
作者簡(jiǎn)介:劉志雄(1973-),男,湖南新化人,講師,從事化學(xué)工程和工藝的教學(xué)與研究。(E-mail:liuzhxi@sina.com)
收稿日期:2008-11-12
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