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M. K. Raj, H. S. P. Rao, S. G. Manjunatha, R. Sridharan, S. Nambiar, J. Keshwan, J. Rappai, S. Bhagat, B. S. Shwetha, D. Hegde and U. Santhosh, “A Mechanistic Investigation of Biginelli Reaction under Base Catalysis,” Tetrahedron Letters, Vol. 52, No. 28, 2011, pp. 3605-3609. http://dx.doi.org/10.1016/j.tetlet.2011.05.011

has been cited by the following article:

• TITLE: Phase Transfer Catalysis Improved Synthesis of 3,4-Dihydropyrimidinones

  AUTHORS: Hela Slimi, Khemaïs Saïd, Younes Moussaoui, Ridha Ben Salem

  KEYWORDS: Multicomponent Reaction; Biginelli Reaction; 3, 4-Dihydropyrimidinones; Phase-Transfer Catalysis; Quaternary Ammonium Salts

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.3 No.3A, November 28, 2013

  ABSTRACT: Various 3,4-dihydropyrimidinones can be prepared via Biginelli reaction in aqueous media by using quaternary ammonium salts of different alkyl groups (C4 and C8) and anions (Cl-and Br-) as catalysts. The use of quaternary ammonium salts along with longer alkyl chains increases the yield of the Biginelli reaction; however, bromide ammonium salts are less active than the chloride ones.