An efficient route for the synthesis of benzimidazoles via a hydrogen-transfer strategy between o-nitroanilines and alcohols

[1,1'-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) has been used as an efficient catalyst for the synthesis of 2-substituted benzimidazoles via a hydrogen-transfer strategy. Various 2-substituted benzimidazoles were synthesized in good to excellent yields (up to 97%). The reaction shows good functional group tolerance. And no additional additive, oxidant, or reductant was required for the reaction. (C) 2016 Elsevier Ltd. All rights reserved.