Iranian Journal of Catalysis (IJC) Urea-hydrogen peroxide/silica phosphoric acid-catalyzed oxidation- condensation Tandem reaction: One-pot synthesis of 2-substituted benzimidazoles from alcohols Volume 2 (2012) Issue 3, September 2012 2024 02 03 Urea-hydrogen peroxide/silica phosphoric acid-catalyzed oxidation- condensation Tandem reaction: One-pot synthesis of 2-substituted benzimidazoles from alcohols EN Ahmad Reza Momeni Department of Chemistry, Faculty of Science, Shahrekord University, Shahrekord, Iran. Heshmat Allah Samimi Faculty of Sciences, Shahrekord University, 115-381, Shahrekord, Iran. Reyhaneh Jahanian Faculty of Sciences, Shahrekord University, 115-381, Shahrekord, Iran. Journal Article 2024 02 03 An efficient one-pot oxidation/condensation tandem process has been developed for the synthesis of 2-substituted benzimidazole derivatives from benzylic alcohols and 1,2-phenylenediamine with use of urea-hydrogen peroxide/silica phosphoric acid  as a bifunctional catalyst. This method provides a rapid and efficient access to 2-substituted benzimidazoles.