2286-29-5Relevant academic research and scientific papers
Highly active zinc oxide-supported lithium oxide catalyst for solvent-free Knoevenagel condensation
Basude, Manohar,Bhongiri, Yadagiri,Masula, Keshavulu,Pasala, Vijay Kumar,Puppala, Veerasomaiah,Sunkara, Prasad
, (2021/07/09)
Li2O/ZnO catalyst was prepared by wet impregnation method and characterized by XRD, SEM, EDX, FTIR, BET surface area and UV-Vis diffuse reflectance spectroscopy. This study revealed a decrease in average particle size and change in the shape of
New mononuclear and binuclear cu(Ii), co(ii), ni(ii), and zn(ii) thiosemicarbazone complexes with potential biological activity: Antimicrobial and molecular docking study
Gaber, Ahmed,Refat, Moamen S.,Belal, Arafa A.M.,El-Deen, Ibrahim M.,Hassan, Nader,Zakaria, Rozan,Alhomrani, Majid,Alamri, Abdulhakeem S.,Alsanie, Walaa F.,Saied, Essa M.
, (2021/05/28)
Herein, we report the synthesis of eight new mononuclear and binuclear Co2+, Ni2+, Cu2+, and Zn2+ methoxy thiosemicarbazone (MTSC) complexes aiming at obtaining thiosemicarbazone complex with potent biological a
MOFs assembled from C 3symmetric ligands: Structure, iodine capture and role as bifunctional catalysts towards the oxidation-Knoevenagel cascade reaction
Zhang, Ying-Ying,Liu, Qing,Zhang, Lin-Yan,Bao, Yu-Mei,Tan, Jing-Yi,Zhang, Na,Zhang, Jian-Yong,Liu, Zhen-Jiang
, p. 647 - 659 (2021/01/28)
Three new NiII/CoII-metal organic frameworks were self-assembled by the reaction of C3 symmetric 1,3,5-tribenzoic acid (H3BTC) and 2,4,6-tris(4-pyridyl)-1,3,5-triazine (4-TPT) ligands and NiII/CoII salts under solvothermal conditions. Isomorphous MOF1 and MOF2 exhibit a 3D pillar-layer framework based on binuclear M2(OH)(COO)2 units connected by tritopic BTC3- and 4-TPT ligands with a novel (3,5)-connected topology net. MOF3 displays a 3-fold interpenetrated 3D network exhibiting a (3,4)-connected topology net. The porous MOF3 can reversibly take up I2. The activated MOFs contain both Lewis acid (NiII center) and basic (uncoordinated pyridyl or carboxylic groups) sites, and act as bifunctional acid-base catalysts. The catalytic measurements demonstrate that the activated MOF3 exhibits good activities for benzyl alcohol oxidation and the Knoevenagel reaction and can be recycled and reused for at least four cycles without losing its structural integrity and high catalytic activity. Thus, the catalytic properties for the oxidation-Knoevenagel cascade reaction have also been studied.
Ammonium chloride: An efficient and environmentally benign catalyst for knoevenagel condensation of carbonyl and active methylene compounds
Tasqeeruddin,Asiri, Yahya I.,Mujahid Alam
, p. 3024 - 3028 (2021/01/06)
In the present study, a rapid, simple and an efficient procedure for the Knoevenagel condensation of various carbonyl and active methylene compounds in ethanol at a moderate temperature in the presence of a catalytic amount of an efficient, environmentall
Synthesis of highly substituted tetrahydroquinolines using ethyl cyanoacetate: Via aza-Michael-Michael addition
Chen, Chinpiao,Lee, Gene-Hsian,Palanimuthu, Arunan
, p. 13591 - 13600 (2020/04/23)
A three-component cascade reaction involving 2-alkenyl aniline, aldehydes, and ethyl cyanoacetate in the presence of DBU to synthesize highly substituted 1,2,3,4-tetrahydroquinolines is reported. The reaction proceeded through the Knoevenagel condensation
A Simple and Highly Versatile Procedure for the Knoevenagel Condensation Promoted by an Efficient, Eco-Friendly, and Recyclable nano-ZnO Catalyst
Alam, M. M.,Asiri, Ya. I.,Sulthana, S. Sh.,Tasqeeruddin, S.
, p. 315 - 321 (2020/04/17)
Abstract: A simple, highly versatile, and efficient protocol for the synthesis of substituted olefins from various aromatic aldehydes and active methylene compounds by Knoevenagel condensation using an efficient, eco-friendly, and recyclable nano-ZnO cata
Highly efficient FeNP-embedded hybrid bifunctional reduced graphene oxide for Knoevenagel condensation with active methylene compounds
Patel, Dikin,Vithalani, Ravi,Modi, Chetan K.
, p. 2868 - 2881 (2020/03/03)
We have synthesized atypical highly active bifunctional FeNPs implanted on amino-modified reduced graphene oxide (FeNPs/Am@rGO) [where FeNPs = Fe nanoparticles; Am = Primary aromatic amine derivatives such as p-phenylenediamine (PPD) and/or aniline (AN)]
Overcoming acid–base copolymer neutralization using mesoporous carbon and its catalytic activity in the tandem deacetalization–Knoevenagel condensation reaction
Javad Kalbasi, Roozbeh,Rahmati, Fatemeh,Mazaheri, Omid
, p. 3413 - 3430 (2020/05/16)
Abstract: Acid–base copolymer materials are of considerable interest because of their fundamental implications for acid–base bifunctional catalysis applications. However, quenching the acid and base sites of the copolymer with each other in free radical polymerizations is still challenging. Herein, we demonstrate that the polymerization of styrenesulfonic acid-co-4-vinylpyridine into the mesoporous carbon material (i.e., CMK-3) can control the chain growth polymerization and result in decreasing the interaction of the acid–base sites. The results showed that by using CMK-3, 40% of the acid and base sites of the copolymer remain in their original form while 60% of acid and base sites convert to the pyridinium and sulfonate forms. Furthermore, it is demonstrated that this material can be processed as a heterogeneous bifunctional acid–base catalyst in the tandem one-pot acid–base reaction (i.e., deacetalization–Knoevenagel condensation reaction) with a high catalytic activity in aqueous media. Graphic abstract: [Figure not available: see fulltext.].
Mechanically fabricated Metal–organic framework/resin composite nanoparticles for efficient basic catalysis
Zhang, Zhi-Hui,Qian, Bing-Bing,Sheng, Pan-Pan,Yang, Sen,Huang, Xian-Feng,Wang, Jin-Long,Chen, Qun,Wang, Liang,He, Ming-Yang
, (2019/01/16)
Zeolitic imidazolate framework-8 (ZIF-8) was successfully composited with an anionic basic resin 201?×?7 (717-resin) to provide a novel ZIF-8/717-resin composite. Its catalytic activity toward the Knoevenagel condensation reaction was evaluated. Results s
Heterogeneous basic catalyst and continuous flow preparing method for alpha, beta-unsaturated compound based on heterogeneous basic catalyst
-
Paragraph 0090-0094, (2019/07/16)
The invention discloses a preparing method for a heterogeneous basic catalyst. The preparing method includes the steps that chlorine balls, a nitrogen-containing compound and a solvent are put into areaction container, pH is adjusted, and the mixture reac
