Synthesis of 3,4-Dihydropyrimidin-2(1<i>H</i>)-ones using Sodium Bisulfate as a Catalyst under Solvent-free Conditions
作者:Min Wang、Ji-Lei Song、Shuang Zhao、Xin Wan
DOI:10.1080/00304948.2014.944407
日期:2014.9.3
the preparation of 5-unsubstituted 3,4-dihydropyrimidin2(1H)-ones via the one-pot condensation of aromatic aldehydes, acetophenones and urea in the presence of NaHSO4 at 90◦C without solvent and promoter (Scheme 1). We initiated our study with 2-nitrobenzaldehyde, acetophenone, and urea as a model reaction to determine the best experimental conditions. Solvent, the amount of catalyst and suitable reaction
Facile Biginelli-Type Reactions Catalysed by Super Acidic Ionic Liquid under Solvent-Free Conditions
作者:Liang Wang、Min Zhou、Qun Chen、Ming-Yang He
DOI:10.3184/174751912x13518654161237
日期:2012.12
[MeC(OH)2]+ClO4- as a super acidicionicliquid is an extremely active catalyst for Biginelli-type reactions. The present method is especially effective for the inactive aliphatic aldehydes. The solvent-freeconditions, high catalytic activity, wide substrates tolerance and convenient product isolation make the protocol more advantageous.
A novel protocol for solvent-free synthesis of 4,6-diaryl-3,4-dihydropyrimidine-2(1H)-ones catalyzed by metal oxide–MWCNTs nanocomposites
作者:Javad Safari、Soheila Gandomi-Ravandi
DOI:10.1016/j.molstruc.2014.05.012
日期:2014.9
cost and long lifetime. The application of solvent-free conditions and transition metal oxides decorated–MWCNTs (MOx–MWCNTs) nanocomposites as attractive, effective and reusable catalysts leads to the efficient synthesis of 4,6-diaryl-3,4-dihydropyrimidin-2-(1H)-ones. This recyclable heterogeneous catalyticsystem provides a simple strategy to generate a variety of pyrimidinones under solvent-free conditions
Fe<sub>3</sub>O<sub>4</sub>–CNTs nanocomposites: a novel and excellent catalyst in the synthesis of diarylpyrimidinones using grindstone chemistry
作者:Javad Safari、Soheila Gandomi-Ravandi
DOI:10.1039/c3ra47827k
日期:——
The Fe3O4–CNTs in conjunction with grindstone chemistry have been used in this report to synthesize 5-unsubstituted pyrimidinones.
本报告使用磁性纳米颗粒Fe3O4和碳纳米管(CNTs)结合研磨化学方法来合成5-未取代嘧啶酮。
MnO2–MWCNT nanocomposites as efficient catalyst in the synthesis of Biginelli-type compounds under microwave radiation
作者:Javad Safari、Soheila Gandomi-Ravandi
DOI:10.1016/j.molcata.2013.02.021
日期:2013.7
A novel Biginelli-like cyclocondensation reaction is efficiently catalyzed by MnO2-CNT nanocomposites as a new catalyst under microwave irradiation and solvent-free conditions in excellent yields. The major advantages of the present method are high yields, short reaction times and solvent-free reaction conditions, reducing reaction steps and purification of products by non-chromatographic methods. The activity, recovery and reusability of the catalyst are found to be good. (C) 2013 Elsevier B.V. All rights reserved.