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邻硝基苯胺还原关环一步法合成苯并咪唑类化合物 被引量:6

Synthesis of Benzimidazoles from o-Nitroanilines in a One-Step Reductive Cyclization Process
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摘要 邻硝基苯胺(1,4)与芳香醛(2a-c)在连二亚硫酸钠存在下共热,发生还原关环反应,一步即可合成苯并咪唑类化合物(3a-c,5a-c).当起始物中含有不止一个硝基时,连二亚硫酸钠对硝基的还原有选择性.反应以乙醇-水为溶剂,水可加速反应进程. Benzimidazoles (3a-c, 5a-c) were synthesized in a one step reduetive eyelization reaction of o-nitroanilines (1, 4) and aryl aldehydes (2a-c). Sodium dithionite was used as a reduetive reagent. Selectivity was found when more than one nitro group existed in the substrates. A mixture of ethanol and water was used as solvent. The reaction was accelerated by water.
机构地区 上海大学理学院
出处 《上海大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第1期77-81,共5页 Journal of Shanghai University:Natural Science Edition
关键词 苯并咪唑 硝基化合物 连二亚硫酸钠 选择性还原 环化反应 benzimidazole nitro compound sodium dithionite selective reduction cyclization
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参考文献15

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二级参考文献3

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