Efficient and Green Microwave-Assisted Multicomponent Biginelli Reaction for the Synthesis of Dihydropyrimidinones Catalyzed by Heteropolyanion-Based Ionic Liquids Under Solvent-Free Conditions
Abstract An efficient and green route for the synthesis of dihydropyrimidinones via microwave-assisted Biginellireactioncatalyzed by 3 mol% of heteropolyanion-based ionic liquids undersolvent-freeconditions has been reported. The practical reaction was found to be compatible with different structurally diverse substrates. Good to excellent yields, short reaction times, and operational simplicity
N-Butyl-N,N-dimethyl-α-phenylethylammonium bromide catalyzes efficiently the three component condensation reaction of an aromatic aldehyde, a β-ketoester and urea/thiourea under solvent free conditions at 100°C to afford the corresponding dihydropyrimidinone in high yield.
Samarium Triflate–Catalyzed Biginelli Condensation: An Improved Method for the Synthesis of 3,4-Dihydropyrimidin-2(<i>1H</i>)-ones
作者:A. Venkat Narsaiah、A. Ramesh Reddy、J. S. Yadav
DOI:10.1080/00397911.2010.515355
日期:2011.9.15
Abstract A simple and efficient method for multicomponant synthesis of 3,4-dihydropyrimidinones has been reported. All the reactions were carried out using samarium triflate as catalyst (10 mol%) at acetonitrile reflux. This procedure is applicable to a variety of substrates such as aliphatic, aromatic, and heterocyclic aldehydes.
Propane phosphonic acid anhydride: a new promoter for the one-pot Biginelli synthesis of 3,4-dihydropyrimidin-2(1H)-ones
作者:Franz L. Zumpe、Melanie Flüß、Krischan Schmitz、Andreas Lender
DOI:10.1016/j.tetlet.2006.12.098
日期:2007.2
Propane phosphonic acid anhydride has been found to promote the Biginellisynthesis of 3,4-dihydropyrimidin-2(1H)-ones. The use of this agent is characterized by moderate costs, low toxicity and simple workup conditions.
Dihydropyrimidinones: efficient one-pot green synthesis using Montmorillonite-KSF and evaluation of their cytotoxic activity
作者:Saleem Farooq、Fahad A. Alharthi、Ali Alsalme、Aashiq Hussain、Bashir A. Dar、Abid Hamid、S. Koul
DOI:10.1039/d0ra09072g
日期:——
A simple, efficient, cost-effective, recyclable and green approach has been developed for the synthesis of new dihydropyrimidinone analogs via the Biginelli reaction. The methodology involves a multicomponent reaction catalyzed by “HPA-Montmorillonite-KSF” as a reusable and heterogeneous catalyst. This method gives an efficient and much improved modification of the original Biginelli reaction, in terms