29202-06-0Relevant academic research and scientific papers
Fluorine-containing pyridine imine ligand, transition metal complex thereof and application of ligand to polyisoprene synthesis
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Paragraph 0060; 0065; 0066; 0067, (2018/11/03)
The invention discloses a fluorine-containing pyridine imine ligand, a transition metal complex thereof and an application of the ligand to polyisoprene synthesis, and belongs to the field of new compounds and metal organic synthesis. The complex is used
Diverse C-6 substituted 4-methyl-2-(2-, 3- and 4-pyridinyl)quinolines: synthesis, in vitro anticancer evaluation and in silico studies
Kouznetsov, Vladimir V.,Robles-Castellanos, Mayra L.,Sojo, Felipe,Rojas-Ruiz, Fernando A.,Arvelo, Francisco
, p. 551 - 561 (2017/02/15)
A series of twelve 4-methyl-2-(2-, 3- and 4-pyridinyl)quinolines 7–9 was synthesized using modified Kametani reaction protocol and their in vitro cytotoxicity was tested against human cancer cell lines MCF-7, SKBR-3, PC3, HeLa, comparing with human dermis
Dual Role of Acetate in Copper(II) Acetate Catalyzed Dehydrogenation of Chelating Aromatic Secondary Amines: A Kinetic Case Study of Copper-Catalyzed Oxidation Reactions
Sreenath, Kesavapillai,Yuan, Zhao,Macias-Contreras, Miguel,Ramachandran, Vasanth,Clark, Ronald J.,Zhu, Lei
supporting information, p. 3728 - 3743 (2016/08/19)
Copper(II) acetate is a frequent empirical choice of the copper source in copper(II)-mediated redox reactions. The effect of the acetate counterion appears crucial but has not been adequately investigated. Herein, we report that copper(II) acetate catalyz
Palladium(II) complexes with N,N′-bidentate N-methyl-N-(pyridin-2-ylmethyl)aniline and its derivatives: Synthesis, characterization, and methyl methacrylate polymerization
Kim, Sunghoon,Song, Yujin,Lee, Ha-Jin,Jeon, Jongho,Park, Sang Hyun,Lee, Hyosun
, p. 609 - 617 (2015/05/05)
The N,N′-bidentate [(N,N′)PdCl2] complexes [i.e., [LnPdCl2] (Ln = L1-L5)] were synthesized by the reaction of [Pd(CH3CN)2Cl2] with N-methyl-N-(pyridin-2-ylmethyl)aniline (L1) and its derivatives (L2-L5) in ethanol. The molecular structures of [LnPdCl2] (Ln = L1-L3) were characterized using X-ray crystallography, which showed that the Pd atom in the Pd(II) complexes had a square planar geometry involving two nitrogen atoms of N,N′-bidentate and two chlorido ligands. The complexes [LnPdCl2] (Ln = L1-L5) were investigated for methyl methacrylate (MMA) polymerization in the presence of modified methylaluminoxane (MMAO) at 60°C. Specifically, complex [L1PdCl2] showed moderate catalytic activity toward MMA polymerization with an activity of 3.03 × 104 g poly(methylmethacrylate) (PMMA)/mol Pd·h and PMMA syndiotacticity (characterized by 1H NMR spectroscopy) of ～0.68.
Dynamic aminal-based TPA ligands
Zhou, Yuntao,Yuan, Yaofeng,You, Lei,Anslyn, Eric V.
supporting information, p. 8207 - 8213 (2015/05/27)
The use of dynamic covalent reactions (DCRs) is gaining popularity for the construction of self-assembling architectures. We have recently introduced DCRs that exchange alcohols and aldehydes to create hemiaminal ethers within tri(2-picolyl)amine (TPA) li
Studies of electronic effects of modified pyridine-imine ligands utilized in cobalt-catalyzed meta-selective Diels-Alder reactions
Hilt, Gerhard,Janikowski, Judith,Schwarzer, Martin,Burghaus, Olaf,Sakow, Dimitri,Br?ring, Martin,Drüschler, Marcel,Huber, Benedikt,Roling, Bernhard,Harms, Klaus,Frenking, Gernot
, p. 219 - 223 (2013/11/06)
The regioselectivity of cobalt-catalyzed Diels-Alder reactions can be controlled by the choice of ligands on the cobalt center. Ligands of the pyridine-imine type favor the formation of the 1,3-disubstitution pattern on the dihydroaromatic product. The investigation was aimed to elucidate the factors for controlling the regioselectivities and reactivity induced by electronic effects of the pyridine-imine ligands in the cobalt-catalyzed Diels-Alder reaction. For that, electron-withdrawing as well as electron donating substituents were introduced in the 4-position on the pyridine moiety and on the 4′-position of the aniline derivative used in the imine subunit of the ligands. In close synergy DFT calculations and the comparison with experimental results proved that electronic variation of the substituents at both positions have a negligible influence on the regioselectivity. However, the kinetic data for the cobalt-catalyzed Diels-Alder reactions revealed that there are great differences in the lengths of the induction periods when different cobalt pyridine-imine complexes are applied. These results could be elucidated by conductivity experiments showing that ionic homoleptic complexes Co(L) 22+/CoBr42- are in equilibrium with their corresponding neutral heteroleptic complexes of type Co(L)Br2 in solution. The equilibrium position depends on the electronic characteristics of the pyridine-imine ligands (L), thereby influencing the length of the induction period.
Palladium(II) complexes containing N,N′-bidentate N-(pyridin-2-ylmethyl)aniline and its derivatives: Synthesis, structural characterisation, and methyl methacrylate polymerisation
Kim, Sunghoon,Kim, Dongil,Lee, Ha-Jin,Lee, Hyosun
, p. 66 - 74 (2014/05/20)
The reaction of [Pd(CH3CN)2Cl2] with N-(pyridin-2-ylmethyl)aniline (L1) and its derivatives (L 2-L6) in ethanol yields [(NN′)PdCl2] complexes, namely [LnPdCl2] (Ln = L 1-L6). The X-ray crystal structure of Pd(II) complexes revealed that the palladium atom in [LnPdCl2] (L n = L1-L6) showed a square plane geometry involving two nitrogen atoms of NN′-bidentate and two chlorido ligands. Complex [L4PdCl2] containing 2,4,6-trimethyl-N-(pyridin-2- ylmethyl)aniline (L4) showed the highest catalytic activity for the polymerisation of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 1.41 × 105 g PMMA/mol Pd·h at 60 °C and poly(methyl methacrylate) (PMMA) syndiotacticity (characterised using 1H NMR spectroscopy) of ca. 0.70.
Synthesis of di-nitrogen Schiff base complexes of methyltrioxorhenium(VII) and their application in epoxidation with aqueous hydrogen peroxide as oxidant
Gao, Yu,Zhang, Yuecheng,Qiu, Chuanjiang,Zhao, Jiquan
scheme or table, p. 54 - 60 (2011/09/16)
Several di-nitrogen Schiff bases were synthesized through the condensation of 2-pyridinecarboxaldehyde with primary amines. The Schiff bases as ligands coordinated with methyltrioxorhenium (MTO) smoothly to afford the correspondent complexes which were characterized by IR, 1H NMR, 13C NMR, MS and elemental analysis. One of the complexes was analyzed by X-ray crystallography as well. The results revealed that the complexes display distorted octahedral geometry in the solid state with a trans-position of Schiff base. Catalytic results indicated that the complexes as catalysts increased the selectivity of epoxides remarkably compared with MTO in the epoxidation of alkenes with 30% hydrogen peroxide as oxidant and the increasing rate depended on the structure of the Schiff base ligands of the complexes. The results indicated that the stronger the donating ability of the ligand, the higher selectivity of epoxides the complex gave in the epoxidation of alkenes with 30% hydrogen peroxide as oxidant. Copyright
Synthesis and electrochemical studies of nickel -diketonate complexes incorporating asymmetric diimine ligands
Harding, Phimphaka,Harding, David J.,Soponrat, Nitisastr,Tinpun, Kittiya,Samuadnuan, Sirirat,Adams, Harry
experimental part, p. 75 - 82 (2010/05/18)
The reaction of ppaX {(4-X-phenyl)-pyridin-2-ylmethylene-amine; X = H, Me, Et, OMe, F, Cl, Br, and I} with [Ni(β-diketonate) 2(H2O)2] {β-diketonate = 1,3-diphenylpropanedionate (dbm), 2,2,6,6-tetramethyl-3,5-hep
