___

• Kozhevnikov, I. V., “Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid- Phase Reactions”, Chem. Rev., 98: 171 – 198 (1998).
• Tiofeeva, M. N., Dimidov, A. V., Davydov, A. A., Kozhevnikov, I.V., “UV-Vis and ESR spectroscopic studies of the adsorption of arenes on the heteropoly acid H3PW12O40”, J. Mol. Catal., 79: 21-28 (1993).
• Firouzabadi, H., Iranpoor, N., Nowrouzi, F., Amani, K., (AlPW12O40) as an efficient heterogeneous inorganic catalyst for the chemoselective synthesis of geminal diacetates (acylals) under solvent-free conditions”, Tetrahedron Lett., 44: 3951-3954 (2003).
• Romanelli, G., Bennardi, D., Ruiz, D. M., Baronetti, G., Autiou, J., Thomas, H. J., “A solvent-free synthesis of coumarins using a Wells–Dawson heteropolyacid as catalyst”, Tetrahedron Lett., 45: 8935-8939 (2004).
• Firouzabadi, H., Iranpoor, N., Nowrouzi, F., Amani, K., “Heteropoly Acids as Heterogeneous Catalysts for Thioacetalization and Transthioacetalization Reactions”, Synthesis., 1: 59-62 (2002).
• Ono, Y., Thomas, J. M., Zamaraev K. I. (Eds.), “Perspective in Catalysis”, Blackwell, London, 341 (1992).
• Kozhevnikov, I. V., “Catalysts for fine chemicals, in: Catalysis by Polyoxometalates”, vol. 2, Wiley, Chichester, (2002).
• Isumi, Y., Hasebe, R., Urabe, K., “Catalysis by heterogeneous supported heteropoly acid”, J. Catal., 84: 402-409 (1983).
• Okuhara, T., Mizuno, N., Misono, M., “Catalytic Chemistry of Heteropoly compounds”, Advances in Catalysis., 41: 113 – 252 (1996).
• Kappe, C. O., “A Reexamination of the Mechanism of the Biginelli Dihydropyrimidine Synthesis. Support for an N-Acyliminium Ion Intermediate”, J. Org. Chem., 62: 7201-7204 (1997).
• Kappe, C. O.,“100 years of the biginelli dihydropyrimidine synthesis”, Tetrahedron., 49: 6937-6963 (1993).
• Atwal, K. S., Swanson, B. N., Unger, S. E., Floyed, D. M., Moreland, S., Hedberg, A., O’Reilly, A., “Dihydropyrimidine calcium channel blockers. 3. 3- Carbamoyl-4-aryl-1,2,3,4-tetrahydro-6-methyl-5- pyrimidinecarboxylic acid esters as orally effective antihypertensive agents”, J. Med. Chem., 34: 806- 811 (1991). [13] Kappe, C.O., “Biologically active dihydropyrimidones of the Biginelli-type a literature survey”, Eur. J. Med. Chem., 35: 1043-1052 (2000).
• Jauk, B., Pernat, T., Kappe, C.O., “Design and Synthesis of a Conformationally Rigid Mimic of the Dihydropyrimidine Calcium Channel Modulator SQ 32,926”, Molecules. 2000, 5: 227-239 (2000). [15] Hu, E.H., Silder, D.R., Dolling, U.H., “Unprecedented Catalytic Three Component One- Pot Condensation Reaction: An Efficient Synthesis of 5-Alkoxycarbonyl- 4-aryl-3,4-dihydropyrimidin- 2(1H)-ones”, J. Org. Chem., 63: 3454-3457 (1998).
• Ma, Y., Qian, C.T., Wang, L.M., Yang, M., “Lanthanide Triflate Catalyzed Biginelli Reaction. One-Pot Synthesis of Dihydropyrimidinones under Solvent-Free Conditions”, J. Org. Chem., 65: 3864- 3868 (2000).
• Brindban, A., Jana, J. U., “Indium(III) Chloride- Catalyzed Dihydropyrimidinones by a Three-Component Coupling Aldehydes, and Urea: An Improved Procedure for the Biginelli Reaction”, J. Org. Chem. 2000, 65: 6270-6272. Synthesis of of
• ,3-Dicarbonyl Compounds,
• Salitha, G., Reddy, G. S. K., Reddy, K. B., Yadav, J. S., “Vanadium(III) chloride catalyzed Biginelli condensation: solution phase library generation of dihydropyrimidin-(2H)-ones”, Tetrahedron Lett., 44: 6497-6499 (2003).
• Gohain, M., Prajapati, D., Sandhu, J. S., “A Novel Cu-catalysed Three-component One-pot Synthesis of Dihydropyrimidin-2(1H)-ones Using Microwaves under Solvent-free Conditions”, Synlett., 235-238 (2004).
• Maiti, G., Kundu, P., Guin, C., “One-pot synthesis of dihydropyrimidinones catalysed by lithium bromide: an improved procedure for the Biginelli reaction”, Tetrahedron Lett., 44: 2757-2758 (2003).
• Reddy, C.V., Mahesh, M., Raju, P. V. K., Babu, T. R.; Reddy, V.V.N., “Zirconium(IV) chloride catalyzed one-pot synthesis of 3,4- dihydropyrimidin-2(1H)-ones”, Tetrahedron Lett., 43: 2657-2659 (2002).
• Yadav, J.S., Reddy, B.V.S., Srinivas, R., Venugopal, C., Ramalingam, T., “LiClO4-Catalyzed One-Pot Synthesis of Dihydropyrimidinones: An Improved Protocol for Biginelli Reaction”, Synthesis., 1341- 1345 (2001).
• Dondoni, A., Massi, A., “Parallel synthesis of dihydropyrimidinones polymer-supported scavengers under solvent-free conditions. A green chemistry approach to the Biginelli reaction”, Tetrahedron Lett., 42: 7975- 7978 (2001). Yb(III)-resin and
• Jin, T., Zhang, S., Li, T., “Toluenesulfonic acid- catalyzed efficient synthesis of Dihydropyrimidine: improved high yielding protocol for the Biginelli reaction”, Synth. Commun., 32: 1847-1851 (2002).
• Salehi, P., Dabiri, M., Zolfigol, M. A., Fard, M. A. B., “Silica sulfuric acid: an efficient and reusable catalyst for the one-pot synthesis of 3,4- dihydropyrimidin-2(1H)-ones”, Tetrahedron Lett., 44: 2889-2891 (2003).
• Tu, S., Fang, F., Zhu, S. L., Zhang, T. X., Zhuang, Q., “A New Biginelli Reaction Procedure Using Potassium Hydrogen Sulfate as the Promoter for an Efficient Synthesis of 3,4-Dihydropyrimidin-2(1H)- one”, Synlett., 537-539 (2004).
• Bigi, F., Carloni, S., Frullanti, B., Maggi, R., Sartori, G., “A revision of the Biginelli reaction under solid acid catalysis. Solvent-free synthesis of dihydropyrimidines over montmorillonite KSF”, Tetrahedron Lett., 40: 3465-3468 (1999).
• Tajbakhsh, M., Mohajerani, B., Heravi, M. M., Ahmadi, A. N., “Solid acid catalytic synthesis of 1,5-benzodiazepines: protocol”, J. Mol. Catal., 247: 213-215 (2006). highly improved
• Rani, R. V., Srinivas, N., Kishan, M. R., Kulkarni, S.J., cyclocondensation synthesis Green Chem., 3: 305-306 (2001).
• “Zeolite-catalyzed reaction for
• ,4-dihydropyrimidin-2(1H)-ones”, of
• Nasr-Esfahani, M., Hoseini, S. J., Mohammadi, F., “Fe3O4 Magnetically Recoverable Catalyst for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones under Solvent- Free Conditions”, Chin J Catal., 32: 1484-1489 (2011). an Efficient and
• Kargar, M., Hekmatshoar, R., Mostashari, A., Hashemi, Z., “Efficient and green synthesis of 3,4- dihydropyrimidin-2(1H)-ones/thiones imidazol-1-yl-aceticacid as a novel, reusable and water-soluble Communications, 15: 123–126 (2011). using
• organocatalyst”, Catalysis of
• ,4-dihydropyrimidin-2(1H)-ones/
• Mingxi, W., Jinlong, Y., Wenwen, Z.., Jingjing, W., Song, C., “One-pot synthesis of difluoromethyl- containing dihydropyrimidinones catalyzed by Yb(PFO)3 under solvent and dehydrating agent free conditions”, Journal of Fluorine Chemistry., 132: 155-159 (2011).
• Chen, X., Xu, X., Liu, H., Cun, L., Gong, L., “High Frequency Dielectric Response in a Branched Phthalocyanine”, J. Am. Chem. Soc., 128: 14802- 14821 (2006).
• Hassani, Z., Islami, M.R., Kalantari, M., “An efficient octahydroquinazolinone derivatives using catalytic amount of HSO4 in water”, Bioorg. Med. Chem. Lett., 16: 4479-4482 (2006). synthesis of
• Zumpe, F.L., Fluß, M., Schmitz, K., Lender, A., “Propane phosphonic acid anhydride: a new promoter for the one-pot Biginelli synthesis of 3,4- dihydropyrimidin-2(1H)-ones”, Tetrahedron Lett., 48: 1421-1423 (2007).
• Anastas, P.T., Warner, J. C., “Green Chemistry: Theory and Practice”, Oxford University, (1998). [39] Pope, M.T., “Heteropoly and Isopoly Oxometalates”, Springer, Berlin, (1983).
• Izumi, Y., Urabe, K., Onaka, M., “Zeolite, Clay and Heteropoly Kodansha/VCH, Tokyo, (1992). Organic Reactions”,
• Pope, M.T., Scully, T.F., “Geometrical isomerism arising from partial substitution of metal atoms in isopoly and heteropoly complexes. Possibilities for the Keggin structure”, Inorg. Chem., 14: 953-954 (1975).
• Khenkin, A.M., Rosenberger, A., Neumann, R., “Reaction H5PVMo10O40Polyoxometalate and Cooxidation of Alkanes with Molecular Oxygen”, J. Catal., 182: 82-91 (1999). with the
• Lin, H., Zhao, Q., Xu, B., Wang, X., “Nafion-H catalyzed cyclocondensation reaction for the synthesis of octahydroquinazolinone derivatives”, J. Mol. Catal. A: Chem., 268: 221-226 (2007).
• Rodrıguez-Domınguez, J. C., Bernardi, D., Kirsch, K., “ZrCl4 or ZrOCl under neat conditions: optimized green alternatives for the Biginelli reaction”, Tetrahedron Lett., 48: 5777-5780 (2007).
• Kholdeeva, O.A., Golovin, A.V., Maksimovskaya, R.I., Kozhevnikov, I.V., J. Mol. Catal., 75: 235 (1992).
• Mahha, Y., Atlamsani, A., Blais, J.C., Tessier, M., Brégeault, J.M., Salles, L., “Oligomerization of ɛ- caprolactone heteropolyacid molybdenum complexes”, J. Mol. Catal. A: Chemical., 234: 63-73 (2005). using and vanadium or