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1. J. Am. Chem. Soc., 1932, 54 (9), pp 3751–3758
RESEARCHES ON PYRIMIDINES. CXXX. SYNTHESIS OF 2-KETO-1,2,3,4-TETRAHYDROPYRIMIDINES
Karl Folkers, H. J. Harwood, Treat B. Johnson

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dx.doi.org/10.1021/ja01348a040

2. Synthetic Communications, Volume 32, Issue 12 June 2002 , pages 1847 - 1851
p-TOLUENESULFONIC ACID-CATALYZED EFFICIENT SYNTHESIS OF DIHYDROPYRIMIDINES: IMPROVED HIGH YIELDING PROTOCOL FOR THE BIGINELLI REACTION
Tongshou Jin ; Suling Zhang; Tongshuang Li

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dx.doi.org/10.1081/SCC-120004068

3.Tetrahedron Letters, Volume 44, Issue 44, 27 October 2003, Pages 8173-8175
New environmentally friendly solvent free synthesis of dihydropyrimidinones catalysed by N-butyl-N,N-dimethyl-α-phenylethylammonium bromide
K. Rosi Reddy, Ch. Venkateshwar Reddy, M. Mahesh, P.V.K. Raju and V.V. Narayana Reddy

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dx.doi.org/10.1016/j.tetlet.2003.09.030

4. J. Org. Chem., 2000, 65 (19), pp 6270–6272
Indium(III) Chloride-Catalyzed One-Pot Synthesis of Dihydropyrimidinones by a Three-Component Coupling of 1,3-Dicarbonyl Compounds, Aldehydes, and Urea: An Improved Procedure for the Biginelli Reaction
Brindaban C. Ranu, Alakananda, Hajra, Umasish, Jana

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dx.doi.org/10.1021/jo000711f

5. J. Am. Chem. Soc., 1933, 55 (9), pp 3784–3791
Researches on Pyrimidines. CXXXVI. The Mechanism of Formation of Tetrahydropyrimidines by the Biginelli Reaction
Karl Folkers, Treat B. Johnson

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dx.doi.org/10.1021/ja01336a054

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