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37 4 Vol. 37 No. 4
2007 8 Aug 2007

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5--23-䱽߻૵ĺϳ
o ϼ W(xu)Ժ W(xu)ch(hun)ϵ Sʯ 435002
ժҪ屽ӞʼԭDƴ߻½(jng)ϳ2-2--1-屽1ͨ^(gu)ɸԇϳ23-䱽߻ૣ2ɸ-ϳ5--23-䱽߻ૣ3^(gu)ԱɫVOͨ^(gu)Ԫط1H NMRgwĽMɺͽYM(jn)˴_Cͱ
P(gun)I~5--23-䱽߻ɫVϳ
ЈD(li)̖TQ251.1īIRaA¾̖1009-9212200704- 0034-02
Synthesis of 5-Acetyl-23-dihydrobenzofuran
ZHENG JingFANG Xia Department of Chemistry and Environmental EngineeringHubei Normal UniversityHuangshi 435002China
AbstractReaction 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-chloroethoxybenzene1and then reacted with magnesium and 12-dibromoethane in anhydrous tetrahydrofuran to produce 23-dihydrobenzofuran2 followed by Friedel-crafts acetylation with acetyl chloride by using aluminum chloride as catalysis in dichloromethane to give 5-acetyl-23-dihydrobenzofuran3. The reaction process was monitored by TLCand the compositions and structures of the intermediates were confirmed by means of elemental analysis and 1H NMR.
Key words5-acetyl-23-dihydrobenzofuranTLCsynthesis
ߺ(jin)飺 o1966-ŮR(sh)򞎟оЙCϳɼE-mailzhengjing9903@yahoo.com.cn
ոڣ2007-05-28
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