Solid state synthesis, characterization, optical properties and cooperative catalytic performance of bismuth vanadate nanocatalyst for Biginelli reactions
The present application relates to compounds and methods for treating pain, incontinence and other conditions.
本申请涉及化合物和治疗疼痛、失禁和其他疾病的方法。
Vanadatesulfuric Acid: A Novel, Recyclable, and Heterogeneous Catalyst for the One-Pot Synthesis of Dihydropyrimidinones and Dihydropyrimidinthiones Under Solvent-Free Conditions
作者:Masoud Nasr-Esfahani、Tooba Abdizadeh
DOI:10.1080/10426507.2012.694001
日期:2013.5.1
Abstract Vanadatesulfuric acid (VSA), as a novel and heterogeneous catalyst, was used for an efficientsynthesis of 3,4-dihydropyrimidin-2(1H)-ones (thiones) using an aldehyde, urea, or thiourea and an acyclic β-dicarbonyl compound undersolvent-freeconditions. VSA is prepared via the reaction of sodium metavanadate and chlorosulfonic acid in high purity. The catalyst was characterized by FTIR, X-ray
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
Solid state synthesis, characterization, optical properties and cooperative catalytic performance of bismuth vanadate nanocatalyst for Biginelli reactions
Bi2V2O7 nano powders were synthesized via a solid state reaction at 500 °C for 8 h using Bi(NO3)3 and VO(acac)2 at stoichiometric 1 : 1 Bi : V molar ratio as raw materials.
Silica-modified magnetite Fe<sub>3</sub>O<sub>4</sub> nanoparticles grafted with sulfamic acid functional groups: an efficient heterogeneous catalyst for the synthesis of 3,4-dihydropyrimidin-2(1<b><i>H</i></b>)-one and tetrahydrobenzo[b]pyran derivatives
sulfonation of diamine-functionalized propyl group grafted on the magnetic silica-coated Fe3O4 nanoparticles. This heterogeneous nanocatalyst was explored to present high catalytic performance for the synthesis of 3,4-dihydropyrimidinones and tetrahydrobenzo[b]pyrans under mild reaction conditions. The properties of this nanocatalyst were characterized by FT- infrared, energy-dispersive X-ray spectrum