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Efficient copper-catalyzed synthesis of 2-arylbenzimidazole derivatives by reaction of 1-fluoro-2-nitrobenzene with benzamidine hydrochlorides

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Chemistry of Heterocyclic Compounds Aims and scope

A novel and efficient approach to the preparation of 2-arylbenzimidazoles is described. Heating a mixture of 1-fluoro-2-nitrobenzene and benzamidine hydrochlorides in the presence of CuBr and K2CO3 in DMSO afforded 2-arylbenzimidazoles in good to excellent yields. The reaction was initiated by nucleophilic aromatic substitution and further proceeded by intramolecular nucleophilic copper-catalyzed cyclization reaction of benzamidine.

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The authors wish to thank the support of the Vice-Chancellor for Research of Shiraz University of Medical Sciences (grant No. 1396-01-12-14909).

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Correspondence to Mohammad Hosein Sayahi or Seyyed Jafar Saghanezhad.

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Published in Khimiya Geterotsiklicheskikh Soedinenii, 2018, 54(3), 351–354

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Sayahi, M.H., Khoshneviszadeh, M., Soheilizad, M. et al. Efficient copper-catalyzed synthesis of 2-arylbenzimidazole derivatives by reaction of 1-fluoro-2-nitrobenzene with benzamidine hydrochlorides. Chem Heterocycl Comp 54, 351–354 (2018). https://doi.org/10.1007/s10593-018-2272-4

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  • DOI: https://doi.org/10.1007/s10593-018-2272-4

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