第 37 卷第 4 期Vol. 37 No. 4
2007 年 8 月Aug 2007

所属栏目:医药及中间体

5-乙酰基-2,3-二氢苯并呋喃的合成
郑 静,方 霞 (湖北师范学院 化学与环境工程系,湖北 黄石 435002)
摘 要:采用邻溴苯酚为初始原料,在相转移催化剂作用下经烷基化合成2-(2-氯乙氧基)-1-溴苯(1),通过生成格氏试剂合成2,3-二氢苯并呋喃(2),由傅-克酰基化反应合成5-乙酰基-2,3-二氢苯并呋喃(3)。反应过程以薄层色谱法监控,并通过元素分析、1H NMR对各中间体的组成和结构进行了确证和表征。
关键词:5-乙酰基-2,3-二氢苯并呋喃;薄层色谱;合成
中图分类号:TQ251.1  文献标识码:A  文章编号:1009-9212(2007)04- 0034-02
Synthesis of 5-Acetyl-2,3-dihydrobenzofuran
ZHENG Jing,FANG Xia (Department of Chemistry and Environmental Engineering,Hubei Normal University,Huangshi 435002,China)
Abstract:Reaction of 2-bromophenol with 1,2-dichloroethane via alkylation in the presence of the phase transfer catalysis and sodium hydroxide afforded 1-bromo-2-(2-chloroethoxy)benzene(1),and then reacted with magnesium and 1,2-dibromoethane in anhydrous tetrahydrofuran to produce 2,3-dihydrobenzofuran(2) followed by Friedel-crafts acetylation with acetyl chloride by using aluminum chloride as catalysis in dichloromethane to give 5-acetyl-2,3-dihydrobenzofuran(3). The reaction process was monitored by TLC,and the compositions and structures of the intermediates were confirmed by means of elemental analysis and 1H NMR.
Key words:5-acetyl-2,3-dihydrobenzofuran;TLC;synthesis
作者简介:郑 静(1966-),女,湖南临湘人,实验师,研究方向:有机合成及应用。(E-mail:zhengjing9903@yahoo.com.cn)
收稿日期:2007-05-28
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