205999-87-7Relevant articles and documents
Deep eutectic solvent mediated synthesis of 3,4-dihydropyrimidin-2(1H)-ones and evaluation of biological activities targeting neurodegenerative disorders
Asari, Asnuzilawati,Asif Nawaz, Muhammad,Hameed, Abdul,Iftikhar, Mehwish,Iqbal, Jamshed,Jalil, Saquib,Mohamad, Habsah,Rashid, Faisal,Saleem Khan, Maria,Ur Rehman, Atta,al-Rashida, Mariya
, (2021/11/20)
Substitution of hazardous and often harmful organic solvents with “green” and “sustainable” alternative reaction media is always desirous. Ionic liquids (IL) have emerged as valuable and versatile liquids that can replace most organic solvents in a variet
Interrogation of 2,2′-Bipyrimidines as Low-Potential Two-Electron Electrolytes
Griffin, Jeremy D.,Pancoast, Adam R.,Sigman, Matthew S.
supporting information, p. 992 - 1004 (2021/01/25)
As utilization of renewable energy sources continues to expand, the need for new grid energy storage technologies such as redox flow batteries (RFBs) will be vital. Ultimately, the energy density of a RFB will be dependent on the redox potentials of the respective electrolytes, their solubility, and the number of electrons stored per molecule. With prior literature reports demonstrating the propensity of nitrogen-containing heterocycles to undergo multielectron reduction at low potentials, we focused on the development of a novel electrolyte scaffold based upon a 2,2′-bipyrimidine skeleton. This scaffold is capable of storing two electrons per molecule while also exhibiting a low (~-2.0 V vs Fc/Fc+) reduction potential. A library of 24 potential bipyrimidine anolytes were synthesized and systematically evaluated to unveil structure-function relationships through computational evaluation. Through analysis of these relationships, it was unveiled that steric interactions disrupting the planarity of the system in the reduced state could be responsible for higher levels of degradation in certain anolytes. The major decomposition pathway was ultimately determined to be protonation of the dianion by solvent, which could be reversed by electrochemical or chemical oxidation. To validate the hypothesis of strain-induced decomposition, two new electrolytes with minimal steric encumbrance were synthesized, evaluated, and found to indeed exhibit higher stability than their sterically hindered counterparts.
Chitosan-silica sulfate nano hybrid: An efficient biopolymer based-heterogeneous nano catalyst for solvent-free synthesis of 3,4-dihydropyrimidine-2(1H)-one/thiones
Abi, Masoome Nazar,Behrouz, Somayeh,Piltan, Mohammad Amin
, p. 374 - 386 (2021/06/25)
A green and highly efficient approach for the synthesis of 3,4-dihydropyrimidine-2(1H)-one/thione derivatives is described. In this approach, the three-component Biginelli reaction between (thio)urea, methyl acetoacetate and aldehydes under solvent-free c
Recyclable triphenylbismuth (V) bisperfluorooctanesulfonate catalyzed synthesis of dihydropyrimidinones
Abdukader, Ablimit,Mamat, Marhaba,Wang, Rong
, (2020/07/13)
– Triphenylbismuth(V) bisperfluorooctanesulfonate Ph3Bi(OSO2C8F17)2 was successfully synthesized by treatment of Ph3BiCl2 with C8Fl7SO2OAg, and was found to have the nature of air-stability, water tolerance, high thermal stability and strong Lewis acidity
Preparation method of 3,4-dihydropyrimidine-2(1H)-one compound
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Paragraph 0021-0022; 0030-0032, (2020/09/30)
The invention discloses a preparation method of a 3,4-dihydropyrimidine-2(1H)-one compound, wherein the comprises the steps: (1) respectively adding reaction substrate raw materials aromatic aldehydes, 1,3-diketone ester, urea and a trace amount of water
Air-stable zirconium (IV)-salophen perfluorooctanesulfonate as a highly efficient and reusable catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones under solvent-free conditions
Li, Ningbo,Wang, Yijun,Liu, Feijun,Zhao, Xin,Xu, Xinhua,An, Quan,Yun, Keming
, (2020/01/22)
An air-stable complex of zirconium (IV)-salophen perfluorooctanesulfonate (1) was successfully synthesized by reacting Zr (salphen)Cl2 and C8F17SO3Ag. Complex 1 was characterized and studied by different techniq
CoFe2O4?SiO2-NH2-CoII NPs: An effective magnetically recoverable catalyst for Biginelli reaction
Allahresani, Ali,Hemmat, Kaveh,Nasseri, Mohammad Ali,Sangani, Mehri Mohammadpour
, (2020/06/25)
Biginelli reaction entails acid-catalyzed one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) with simply-accessible initial substances, specifically, aldehyde, urea, and active methylene compound. DHPMs have stimulated a resurgence of attention in the previous two decades because of their broad-ranging pharmacological actions and the existence of varied all-natural products. Currently, green methods to asymmetric Biginelli reaction have been researched for anti-inflammatory DHPMs. In materials chemistry, DHPMs are increasingly decision applications in the creation of materials like polymers, adhesives, fabric dyes, etc. In light of the simplicity by which the Biginelli reaction is conducted, numerous interesting prospects expect its exploitation in variety fields. CoFe2O4?SiO2-NH2-CoII is herein turned out to be an effective catalyst at a three-component Biginelli reaction. The yield of the corresponding DHPMs was rather large (20 cases; average 92 percent). Finally, we herein suggest a procedure that shows lots of advantages and benefits such as the whole lack of solvents, mild reaction conditions, comparatively short reaction times. Also, CoFe2O4?SiO2-NH2-CoII NPs catalyst has been readily recovered from the reaction combination and reused, without the decrease of catalytic action.
Nebivolol nanoparticles: A first catalytic use in Biginelli and Biginelli-like reactions
Khaskel, Anamika,Barman, Pranjit,Maiti, Subir Kumar,Jana, Utpal
, p. 1021 - 1025 (2018/11/24)
Herein, we report the catalytic activity of nebivolol nanoparticles a novel organocatalyst for the synthesis of DHPMs and DHPM-5-carboxamides. The nanoparticles are confirmed by DSC, TEM, AFM, and IR spectroscopy. The catalyst can be readily recovered and
N-Donor ligand activation of titanocene for the Biginelli reaction via the imine mechanism
Zheng, Shaohua,Jian, Yajun,Xu, Shan,Wu, Ya,Sun, Huaming,Zhang, Guofang,Zhang, Weiqiang,Gao, Ziwei
, p. 8657 - 8661 (2018/03/08)
The remarkable activation of stable titanocene dichloride (Cp2TiCl2) was achieved using N-donor ligand urea in an alcoholic solvent, leading to the formation of a Ti(iv) species [(MeO)2Ti(NHCONH2)]+,
Heteropoly acid supported on activated natural clay-catalyzed synthesis of 3,4-dihydropyrimidinones/thiones through Biginelli reaction under solvent-free conditions
Selvakumar, Karuppaiah,Shanmugaprabha, Thangamariyappan,Kumaresan, Murugan,Sami, Ponnusamy
, p. 223 - 232 (2018/01/01)
Dihydropyrimidinones/thiones (DHPM’s) have been prepared by one-pot condensation of methyl acetoacetate, aldehydes, urea/thiourea in the presence of heteropoly-11-tungsto-1-vanadophosphoric acid, H4[PVW11O40] · 32H2/