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C. Mukhopadhyay and P. K. Tapaswi, “PEG-Mediated Catalyst-Free Expeditious Synthesis of 2-Substituted Benzimidazoles and Bis-Benzimidazoles under Solvent-Less Conditions,” Tetrahedron Letters, Vol. 49, No. 43, 2008, pp. 6237-6240.
http://dx.doi.org/10.1016/j.tetlet.2008.08.041

has been cited by the following article:

• TITLE: Facile and Efficient Method for Synthesis of Benzimidazole Derivatives Catalyzed by Zinc Triflate

  AUTHORS: Ramineni Srinivasulu, Kannasani Ravi Kumar, Peruri Veera Venkata Satyanarayana

  KEYWORDS: Benzimidazole Derivatives; O-Phynelyenediamine; Substituted Aldehydes; Zinc Triflate

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.4 No.1, February 25, 2014

  ABSTRACT: We report the synthesis of benzimidazole derivatives using zinc triflate as an efficient catalyst. One-pot synthesis of 2-substituted benzimidazole derivatives from o-phynelyenediamine and substituted aldehydes were developed under zinc triflate in ethanol solvent at reflux temperature.