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
Abstract A simple, green, and efficientsynthesis protocol for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones using boehmite nanoparticles as catalyst was developed. It did not use any toxic metal catalysts or corrosive acidic reagents. The method gave good to excellent yields and has short reaction time, operational simplicity, and a recyclable catalyst.
Synthesis and Biological Activities of Novel Thiazole Derivatives of DHPMs via the N, S-dialkylation
作者:Xiao-Fei Zhu、De-Qing Shi
DOI:10.1080/10426500701841680
日期:2008.7.4
A series of novel 1-[6-aryl-1-(2-chlorothiazol-5-yl-methyl)-2-(2-chlorothiazol-5-yl -methylsulfanyl)-4-methyl-1,6-dihydropyrimidin-5-yl]carboxylates or ethanones 2 were synthesized via the N,S-dialkylation of 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) 1 using 2-chloro-5-(chloromethyl)thiazole as the alkylation reagent in one-pot reaction. The structures of the target compounds were confirmed by IR, 1H
Fe3O4 Nanoparticles as an Efficient and Magnetically Recoverable Catalyst for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones under Solvent-Free Conditions
The catalytic activity of Fe3O4 nanoparticles (NPs) in a one-pot three component condensation reaction consisting of an aromatic aldehyde, urea or thiourea, and a β-dicarbonyl under solvent-free conditions was investigated. This reaction affords the corresponding dihydropyrimidinones (thiones) in high to excellent yields. Compared with the classical Biginelli reactions this method consistently gives
Solvent-Free Ball-Milling Biginelli Reaction by Subcomponent Synthesis
作者:Prasit Kumar Sahoo、Anima Bose、Prasenjit Mal
DOI:10.1002/ejoc.201501039
日期:2015.11
here an understanding of systems chemistry on small molecules through covalent mechanochemistry. As a proof-of-concept, the multicomponent Biginellireaction by subcomponentsynthesis was considered as a model system. Reactions were performed under solvent-free, metal-free, mechanochemical (ball milling) and ambient laboratory conditions. Br+-catalyzed oxidation of benzyl alcohols led to the product