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43 2 Vol. 43 No. 2
2013 4 Apr 2013

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ժҪ4-׻߻۞ʼԭ(jng)N-NBS廯SommeletƵ4-߻c(din)廯l(f)廯Լԭضr(sh)gȌSommelet^(gu)̵Ӱ(yu)šl飺NBS廯^(gu)BPOcl(f)ضȞ62r(sh)g5 h4-׻߻ʞ86.8%n4-׻߻ۣnƷ=11.2߻܄}60淴2 h80淴4 ha(chn)Ʒ_78.4%
P(gun)I~4-߻ϳɹˇ廯Sommelet
ЈD(li)̖R972+.4īIRaA¾̖1009-9212201302-0051-04
Synthesis of 4-Aldehydebenzofurazan
YU San-xi12HE Yong2GAO Yong-hao2WU Zong-hao2YAO Ri-sheng1* 1. School of Medical EngineeringHefei University of TechnologyHefei 230009China2. Hefei Huafang Pharmaceutical Science & Technology Co.Ltd.Hefei 230088China
Abstract4-Aldehydebenzofurazan was synthesized from 4-methylbenzofurazan via bromination and Sommelet reaction. The effects of the brominating agent and the initiator on the bromination and the reactants ratiothe temperature and the reaction time on the Sommelet reaction were investigated. The optimal reaction conditions for the first step were as followsbromosuccinimide as brominating agentbenzoyl peroxide as the initiator62 for 5 hand for the second step were as followsthe molar ratio of 4-bromomethylbenzofurazan to hexamethylenetetramine of 1 to 1.2acetic acid as the catalyst and the solventthe salt-forming reaction at 60 for 2 hthe acidolysis reaction at 80 for 4 h. The final product was obtained in overall yield of 68%.
Key words4-aldehydebenzofurazansynthesis processbrominationSommelet reaction
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ոڣ2013-03-01
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