Abstract
Benzimidazolium based on dicationic acidic ionic liquid (AIL) is designed, synthesized, and successfully used as a catalyst for the one-pot synthesis of α-aminophosphonates derivatives. The application of this AIL is studied in a new one-pot method for the synthesis of α-aminophosphonates derivatives under solvent-free conditions. The advantages of this method are the reusability of catalyst, high conversion, short reaction time, and simple experimental procedure.