1867-38-5Relevant academic research and scientific papers
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
Ordered mesoporous Γ-Al2O3 as highly efficient and recyclable catalyst for the Knoevenagel reaction at room temperature
Bhanja, Piyali,Kayal, Utpal,Bhaumik, Asim
, p. 220 - 227 (2018)
Coumarins are important class of organic compounds and intensively used in agricultural and pharmaceutical industries. We have developed a strategy for the synthesis of coumarin derivatives quantitatively via Knoevenagel condensation reaction of an ortho-hydroxyaryl aldehyde and an activated methylene compounds in the presence of ordered mesoporous γ-Al2O3 as a heterogeneous catalyst. The catalyst has been thoroughly characterized through powder X-ray diffraction, N2 sorption analysis, FTIR spectroscopy, TG/DTA, NH3-TPD and CO2-TPD (temperature programmed desorption) analysis. The material possesses periodicity in mesopores and both surface acidic and basic sites having strengths of 1.47 and 1.11 mmol g?1, respectively, which is highly favorable for carrying out the Knoevenagel condensation reaction for the synthesis of a wide range of condensation product (yields ~98%) under very mild conditions. This amphoteric catalyst exhibits good surface Lewis acidity/basicity and high recyclability up to sixth reaction cycles without any significant loss in the product yield.
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.
Fe3O4–cysteamine hydrochloride magnetic nanoparticles: New, efficient and recoverable nanocatalyst for Knoevenagel condensation reaction
Maleki, Razieh,Kolvari, Eskandar,Salehi, Mehdi,Koukabi, Nadiya
, (2017)
Fe3O4 magnetic nanoparticles (MNPs) were obtained using a reduction–precipitation method. These MNPs were modified with cysteamine hydrochloride. This catalyst was characterized using a number of physicochemical measurements. The Fe
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
Cellulose stabilized Fe3O4 and carboxylate-imidazole and Co-based MOF growth as an exceptional catalyst for the Knoevenagel reaction
Zare, Elham,Rafiee, Zahra
, (2020)
In this study, Fe3O4 nanoparticles were functionalized with cellulose, and then hybridized with cobalt (II)-based metal-organic framework (Co-MOF) containing carboxylate and imidazole functionalities. FTIR, XRD, FE-SEM, TEM, BET, EDX
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
Betti base-modified magnetic nanoparticles as a novel basic nanocatalyst in Knoevenagel condensation and its related palladium nanocatalyst in Suzuki coupling reactions
Heidari, Payam,Cheraghali, Ramin,Veisi, Hojat
, p. 991 - 997 (2016)
Betti base-modified Fe3O4 nanoparticles have been successfully designed and synthesized for the first time through the condensation of Fe3O4 magnetic nanoparticles coated by (3-aminopropyl)triethoxysilane with β
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
Application of GO/COF as a novel, efficient and recoverable catalyst in the Knoevenagel reaction
Monehzadeh, Fatemeh,Rafiee, Zahra
, (2020)
Hybrid composite based on graphene oxide (GO) and covalent organic framework (COF) [GO/COF] was developed via a simple solvothermal method, at which GO was applied as a platform to load COF based on melamine and terephthaldehyde. The synthesized hybrid na
