Cu(OTf)2: a reusable catalyst for high-yield synthesis of 3,4-dihydropyrimidin-2(1H)-ones
作者:A.S. Paraskar、G.K. Dewkar、A. Sudalai
DOI:10.1016/s0040-4039(03)00619-1
日期:2003.4
Copper(II) triflate catalyzes efficiently the three-component condensation reaction of an aldehyde, β-ketoester and urea in acetonitrile to afford the corresponding 3,4-dihydropyrimidin-2(1H)-ones in high yields. The catalyst exhibited remarkable reusable activity.
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
Nickel Nanoparticles: An Ecofriendly and Reusable Catalyst for the Synthesis of 3,4-Dihydropyrimidine-2(1H)-ones via Biginelli Reaction
作者:Suryakant B. Sapkal、Kiran F. Shelke、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.5012/bkcs.2010.31.02.351
日期:2010.2.20
Nickel nanoparticles (Ni NPs) appeared to exhibit the catalytic activity in one-pot cyclocondensation reaction for the preparation of 3,4-dihydropyrimidine-2(1H)-ones via Biginelli reaction from aromatic/heteroaromatic/aliphatic aldehydes, urea/thiourea and ethyl acetoacetate under microwave irradiation has been described. The UV absorbance spectra showed metallic Ni characteristics and appreciate with the particle size determined by Transmission electron microscopy (TEM). After reaction course the Ni NPs can be re-covered and reused without any apparent loss of activity.
Magnesium Chloride Hexahydrate Catalyzed One‐Pot Synthesis of 3,4‐Dihydropyrimidin‐2‐(1<i>H</i>)ones Under Solvent‐Free Conditions
作者:Guo‐Lin Zhang、Xiao‐Hua Cai
DOI:10.1081/scc-200050956
日期:2005.3
Abstract 3,4‐Dihydropyrimidin‐2‐(1H)‐one were prepared by Biginelli condensation of aldehyde, 1,3‐dicarbonyl compound and urea under solvent‐free condition at 80°C with magnesiumchloridehexahydrate as catalyst.
New Procedure for One‐Pot Synthesis of 3,4‐Dihydropyrimidin‐2(1<i>H</i>)‐ones by Biginelli Reaction
作者:Feng Xu、Jian‐Jun Wang、You‐Ping Tian
DOI:10.1080/00397910701873524
日期:2008.3.28
Abstract A practical green chemistry procedure for synthesis of 3,4‐dihydropyrimidin‐2(1H);‐ones in good yields was successfully carried out in micellar systems according to the Biginellireaction using β‐ketoester, urea and appropriate aromatic aldehyde in the presence of CuCl2 · H2O as catalyst. The advantages of this method involved the broader application scope of substrates, the more environmental