P. J. Das and J. Das, “Synthesis of Aryl/alkyl(2,2’-bis-3- methylindolyl)methanes and Aryl(3,3’-bisindolyl)Methanes Promoted by Secondary Amine Based Ionic Liquids and Microwave Irradiation,” Tetrahedron Letters, Vol. 53, No. 35, 2012, pp. 4718-4720.
http://dx.doi.org/10.1016/j.tetlet.2012.06.106

has been cited by the following article:

• TITLE: Solvent Free One-Pot Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles Catalyzed by Secondary Amine Based Ionic Liquid and Defective Keggin Heteropoly Acid

  AUTHORS: Pranab Jyoti Das, Jupitara Das, Munni Ghosh, Sabera Sultana

  KEYWORDS: Ionic Liquids; Keggin Heteropolyacid; Microwave; Tetrasubstituted Imidazole; Solvent Free Synthesis; Multicomponent Reaction

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.3 No.4A, November 22, 2013

  ABSTRACT: Secondary amine based ionic liquid and defective Keggin type heteropoly acid (HPA) are separately used for efficient one-pot four-component synthesis of 1,2,4,5-tetrasubstituted imidazoles assisted by microwave (MW). Eco-friendly solvent free procedure, short reaction time, high yield of products and reusability of catalysts are important features of the synthesis. A comparative study on the efficiency of the two catalysts is reported. This work further demonstrates the alternate use of urea, instead of often used ammonium acetate, as source of nitrogen.