title: Praseodymium methanesulfonate catalyzed one-pot synthesis of 3,4-dihydropyrimidin-2-(1H)-ones.
abstract: A series of 3,4-dihydropyrimidin-2-(1H)-ones compounds was synthesized efficiently by a one-pot cyclocondensation of an aldehyde, 1,3-dicarbonyl compound, and urea in absolute ethanol under refluxing temperature using praseodymium methanesulfonate as catalyst. After the reaction, the catalyst can be easily recovered and reused several times without distinct decrease in reaction yields.
authors: College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, Liaoning, PR China. minwangszg@yahoo.com.cn
authors: Min
authors: M
authors: Wang
authors: Zhiguo
authors: Z
authors: Song
authors: Hong
authors: H
authors: Gong
authors: Heng
authors: H
authors: Jiang
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D002384:Catalysis; D000431:Ethanol / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008698:Mesylates / Q000737:chemistry*; D008956:Models, Chemical; D011221:Praseodymium / Q000737:chemistry*; D011744:Pyrimidinones / Q000138:chemical synthesis*; D013237:Stereoisomerism; D013696:Temperature
chemical_list: D000447:Aldehydes; D008698:Mesylates; D011744:Pyrimidinones; C045880:methanesulfonic acid; D000431:Ethanol; D011221:Praseodymium