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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

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�ڳ��;��|;֣��;��¾�;֣��־;л��;��;.��ư��߻��ϳ�2-��[J]. ��ѧ��ҵ�빤��, 2008,25(5): 419-423

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, 2008,25(5): 419-423

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