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Chemcial Industry and Engineering 2008, Vol. 25 Issue (5) :419-423    DOI:
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Synthesis of 2-Phenylbenzimidazole Catalyzed by the Prepared Aminosulfamic Acid
YU Chao-sheng,LIN Wei,ZHENG Xiao-feng,LI De-jun,ZHENG Chuan-zhi,XIE Jin,LI Bin(Department of Chemistry and Chemical Engineering,College of Science,Northeast Forestry University,Heilongjiang Key Laboratory of Flame Retarded Polymeric Materials,Education Department of Heilongjiang Province,Harbin 150040,Heilongjiang Province,China)
(Department of Chemistry and Chemical Engineering,College of Science,Northeast Forestry University,Heilongjiang Key Laboratory of Flame Retarded Polymeric Materials,Education Department of Heilongjiang Province,Harbin 150040,Heilongjiang Province,China

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Abstract 2-phenylbenzimidazole was prepared by reaction of o-phenylenediamine and benzaldehyde in anhydrous ethanol,catalyzed by the prepared aminosulfamic acid.The product was characterized by UV-visible spectroscopy,Fourier transform infrared spectroscopy and(()~1HNMR). The effects of catalyst dosage,reactant ratio,reaction temperature,reaction time on the yield of product were investigated.The optimal condition is that the highest yield of 2-phenylbenzimidazole is 71.8% when the reaction is carricd out with ratio of amminosulfamic acid mass to o-phenylenediamine mole of 4.0 g/mol,the ratio of o-phenylenediamine to benzaldehyde of 2.5,at(85 ��) for 3.0 h.
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Received 2008-09-15; published 2008-09-15
Cite this article:   
YU Chao-sheng,LIN Wei,ZHENG Xiao-feng,LI De-jun,ZHENG Chuan-zhi,XIE Jin,LI Bin.Synthesis of 2-Phenylbenzimidazole Catalyzed by the Prepared Aminosulfamic Acid[J]  Chemcial Industry and Engineering, 2008,V25(5): 419-423
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