1867-38-5Relevant articles and documents
Preparation, characterization and catalyst application of ternary interpenetrating networks of poly 4-methyl vinyl pyridinium hydroxide-SiO 2-Al2O3
Kalbasi, Roozbeh Javad,Kolahdoozan, Majid,Vanani, Sedigheh Mozafari
, p. 2009 - 2016 (2011)
In this work, Al2O3 was mixed with SiO2 and poly 4-vinylpyridine by the sol-gel method in order to make a composite which is used as a heterogeneous basic catalyst for Knoevenagel condensation reaction. The physical and ch
A facile transfer of dicyano methylene group between arylidenemalononitrile and aldehyde
Ahmed,Sarmah,Longchar,Boruah,Sandhu
, p. 771 - 777 (2000)
Arylidenemalononitrile undergoes facile exchange of dicyano methylene group with β-formyl steroidal enamide as well as aromatic aldehydes under mild base catalysed reaction.
Five porous zinc(II) coordination polymers functionalized with amide groups: Cooperative and size-selective catalysis
Ma, Lufang,Wang, Xiaoning,Deng, Dongsheng,Luo, Feng,Ji, Baoming,Zhang, Jian
, p. 20210 - 20217 (2015)
Five functionalized porous coordination polymers 1-5 with highly ordered amide groups in the channels show notable interaction with guest molecules. The amide groups functioned as trigger sites and catalytically driven forces to activate substrate proximi
Synthesis of arylmethylenemalononitriles catalyzed by KF-Al 2O3 under ultrasound
Li, Ji-Tai,Chen, Guo-Feng,Wang, Shu-Xiang,He, Lin,Li, Tong-Shuang
, p. 231 - 233 (2005)
Knoevenagel condensation of malononitrile with aromatic aldehydes catalyzed by KF-Al2O3 under ultrasound irradiation in anhydrous ethanol results in the formation of arylmethylenemalononitriles in 73-97% yields within 15-60min. CSIRO
Arylboronic acids inhibit P2X7 receptor function and the acute inflammatory response
Faria, Robson Xavier,de Jesus Hiller, Noemi,Salles, Juliana Pimenta,Resende, Jackson Antonio Lamounier Camargos,Diogo, Roberta Tosta,von Ranke, Natalia Lidmar,Bello, Murilo Lamim,Rodrigues, Carlos Rangel,Castro, Helena Carla,de Luna Martins, Daniela
, p. 277 - 290 (2019)
The P2X7 receptor (P2X7R) is an ion channel which is activated by interactions with the extracellular ATP molecules. The molecular complex P2X7R/ATP induces conformational changes in the protein subunits, opening a pore in the ion channel macromolecular s
Two Hg(II)-based Macrocycles Offering Hydrogen Bonding Cavities: Influence of Cavity Structure on Heterogeneous Catalysis
Pachisia, Sanya,Gupta, Rajeev
, p. 6039 - 6047 (2019)
We present synthesis and characterization of two Hg-macrocycles offering H-bonding based cavities of varying dimensions. Both Hg-macrocycles illustrate noteworthy difference in their catalytic performance that has been related to their cavity structures.
An investigation of the catalytic activity in a series of isoreticular Zn(II)-based metal-organic frameworks
Bigdeli, Fahime,Abedi, Sedigheh,Hosseini-Monfared, Hassan,Morsali, Ali
, p. 122 - 127 (2016)
The catalyst operation of four metal-organic frameworks (MOFs), [Zn(oba)(4-bpmb)0.5]n·(DMF)1.5 (TMU-6), [Zn(oba)(R-4-bpmb)0.5]n·(DMF)1.5 (R-TMU-6), [Zn(oba)(4-bpmn)0.5]n/su
Co2+ immobilized on highly ordered mesoporous graphitic carbon nitride (ompg-C3N4/Co2+) as an efficient and recyclable heterogeneous catalyst for one-pot tandem selective photo-oxidation/Knoevenagel condensation
Ghafuri, Hossein,Jafari, Ghazaleh,Rashidizadeh, Afsaneh,Manteghi, Faranak
, (2019)
Design and synthesis of efficient heterogeneous photocatalysts is an important task for practical applications due to the increasing environmental challenges and energy crisis. In this work, Co2+ modified highly ordered mesoporous graphitic carbon nitride (ompg-C3N4/Co2+) was prepared through a simple procedure involving sonication treatment. The obtained catalyst was characterized using FT-IR, XRD, ICP-OES, FE-SEM, UV–vis DRS, N2 adsorption-desorption, and TGA. It was found that the ompg-C3N4/Co2+ can function as a multifunctional heterogeneous photocatalyst for the one-pot tandem selective photo-oxidation/ Knoevenagel condensation. More interestingly, the obtained ompg-C3N4/Co2+ represented a high photocatalytic activity in benzyl alcohol oxidation without any oxidant under air atmosphere and visible light irradiation.
Development of Amine Functionalized Wrinkled Silica Nanospheres and Their Application as Efficient and Recyclable Solid Base Catalyst
Shabir, Javaid,Garkoti, Charu,Surabhi,Sah, Digvijay,Mozumdar, Subho
, p. 194 - 204 (2018)
Abstract: Amine functionalized wrinkled silica nanospheres (WSiO2–NH2) were successfully synthesized by using a simple biphase sol–gel approach. The prepared silica nanospheres were characterized by using various techniques, such as
Fe3O4-Methylene diphenyl diisocyanate-guanidine (Fe3O4–4,4′-MDI-Gn): A novel superparamagnetic powerful basic and recyclable nanocatalyst as an efficient heterogeneous catalyst for the Knoevenagel condensation a
Maleki, Razieh,Koukabi, Nadiya,Kolvari, Eskandar
, (2018)
In this paper, guanidine groups (Gn) supported on modified magnetic nanoparticles (Fe3O4–4,4′-MDI) were synthesized for the first time. The catalyst synthesized was characterized by various techniques such as SEM (Scanning Electron M
Ionic liquid functionalized silica gel: novel catalyst and fixed solvent
Lai, Guoqiao,Peng, Jiajian,Li, Jiayun,Qiu, Huayu,Jiang, Jianxiong,Jiang, Kezhi,Shen, Yongjia
, p. 6951 - 6953 (2006)
Imidazolium cation-based ionic liquid functionalized silica gel was prepared, and Knoevenagel condensation as well as cycloaddition of propylene oxide and carbon dioxide without any additional organic solvents has been investigated. It was found that imid
A ru-complex tethered to a N-rich covalent triazine framework for tandem aerobic oxidation-knoevenagel condensation reactions
Abednatanzi, Sara,Der Voort, Pascal Van,Derakhshandeh, Parviz Gohari,Leus, Karen,Schmidt, Johannes,Watson, Geert
, (2021)
Herein, a highly N-rich covalent triazine framework (CTF) is applied as support for a RuIII complex. The bipyridine sites within the CTF provide excellent anchoring points for the [Ru(acac)2(CH3CN)2]PF6 complex. The obtained robust RuIII@bipy-CTF material was applied for the selective tandem aerobic oxidation-Knoevenagel condensation reaction. The presented system shows a high catalytic performance (>80% conversion of alcohols to α, β-unsaturated nitriles) without the use of expensive noble metals. The bipy-CTF not only acts as the catalyst support but also provides the active sites for both aerobic oxidation and Knoevenagel condensation reactions. This work highlights a new perspective for the development of highly efficient and robust heterogeneous catalysts applying CTFs for cascade catalysis.
Polyionic liquid decorated chitosan beads as versatile metal-free catalysts for catalyzing chemical reactions in aqueous media
Koohestani, Fatemeh,Sadjadi, Samahe
, (2021/04/19)
A new strategy is presented for enhancing the catalytic activity of cross-linked chitosan beads. More precisely, chitosan beads were cross linked with glutaraldehyde and then, vinyl functionalized. In the next step, the vinyl-functionalized beads were pol
A readily accessible porous organic polymer facilitates high-yielding Knoevenagel condensation at room temperature both in water and under solvent-free mechanochemical conditions
Sarma, Parishmita,Sarmah, Kashyap Kumar,Kakoti, Dharittri,Mahanta, Sanjeev Pran,Adassooriya, Nadeesh Madusanka,Nandi, Goutam,Das, Pranab Jyoti,Bu?ar, Dejan-Kre?imir,Thakuria, Ranjit
, (2021/03/24)
A novel nitrogen-rich amorphous porous organic polymer has been synthesized using a microwave-assisted process. Its high chemical stability, reusability and poor solubility enable the use of the porous polymer as a metal-free heterogeneous catalyst for C–