Synthesis, characterization, cis-ligand substitution and catalytic alkane hydroxylation by mononuclear nickel(II) complexes stabilized with tetradentate tripodal ligands
摘要:
The synthesis and spectroscopic characterization of the mononuclear complexes [Ni(bqenH(2))(H2O)(2)](ClO4)(2) 1 and [Ni(bqenMe(2))(H2O)(2)](ClO4)(2) 2 (where bqenH(2) = N, N'-bis(8-quinolyl) ethane-1,2-diamine and bqenMe(2) = N, N'-dimethyl-N, N'-bis(8-quinolyl) ethane-1,2-diamine) is reported. The bqenMe(2) ligand was prepared by a simple modification to the earlier procedure. The reaction of 1 and 2 with 1,10-phenanthroline (phen) or 2,2 '-bipyridine (bpy) resulted in the formation of [Ni(bqenH(2))(phen)](ClO4)(2) 3, [Ni(bqenMe(2))(phen)](ClO4)(2) CH3CN 4, [Ni(bqenH(2))(bpy)](ClO4)(2) 5, and [Ni(bqenMe(2))(bpy)](ClO4)(2) 6. The redox properties of 1-6 are reported. The crystal structures of 3 and 4 consist of distorted octahedral [Ni(bqenH(2))(phen)](2+) and [Ni(bqenMe(2))(phen)](2+) cations which are stabilized by N-H...O and C-H...O interactions. Compounds 1 and 2 afforded hydroxylation of alkanes with high alcohol to ketone ratio in the presence of m-CPBA oxidant. (C) 2015 Elsevier B.V. All rights reserved.
V IV OCl 2与非平面四齿N 4双喹啉配体的反应产生通式顺式-[V IV (O)(Cl)(N 4 )]Cl的四种氧化钒(IV)化合物。用KF和NaClO 4顺序处理两种非甲基化的N 4氧化钒(IV)化合物导致分离出具有通式顺式-[V IV (O)(F)(N 4 )]ClO 4的物质。与此形成鲜明对比的是,EPR 和理论计算证明,由于空间位阻,甲基化 N 4氧化钒(IV) 衍生物对 KF 反应呈惰性。通过单晶X射线结构分析、连续EPR光谱和磁化率对氧化钒(IV)化合物进行了表征。晶体学表征表明,钒化合物具有高度扭曲的八面体配位环境,并且d (V IV –F) = 1.834(1) Å 是已报道的(氧化)(氟化)钒(IV)化合物中最短的。 V IV O 2+物种的实验 EPR 参数偏离了经验加和关系计算的参数,可归因于轴向供体原子反式至氧化基团和扭曲的 V IV配位环境。 钒化合物可作为水性
Synthesis, characterization and pharmacological evaluation of quinoline derivatives and their complexes with copper(ΙΙ) in in vitro cell models of Alzheimer's disease
作者:Nikolaos Pavlidis、Aristeidis Kofinas、Michael G. Papanikolaou、Haralampos N. Miras、Chryssoula Drouza、Angelos G. Kalampounias、Themistoklis A. Kabanos、Maria Konstandi、George Leondaritis
DOI:10.1016/j.jinorgbio.2021.111393
日期:2021.4
against both, Aβ peptide- and H2O2-induced toxicities. The copper(II) complex [CuII(H2bqch)Cl2].3H2O (H2bqch = N,N′-Bis(8-quinolyl)cyclohexane-1,2-diamine) also protected against H2O2-induced toxicity, with a half-maximal effective concentration of 80 nM. Molecular docking simulations, using the crystal structure of the acetylcholinesterase (AChE)-rivastigmine complex as a template, indicated a strong interaction
阿尔茨海默病 (AD) 是一种中枢神经系统的神经退行性疾病。主要的病理生理机制涉及胆碱能神经传递、β-淀粉样蛋白 (Aβ) 和 Tau 蛋白、几种金属离子和氧化应激等。目前的药物只能缓解症状,不能治愈 AD。越来越多的证据表明,针对多种病理生理机制的多功能化合物可能具有治疗 AD 的巨大潜力。在这项研究中,我们报告了四种基于喹啉的金属螯合剂及其各自的铜 (II) 配合物的合成和物理化学表征。大多数化合物在浓度≤5 μM 时是无毒的。在使用未分化和分化的 SH-SY5Y 细胞的神经保护研究中,金属螯合剂N 2, N 6 -di(quinolin-8-yl)pyridine-2,6-dicarboxamide (H 2 dqpyca) 似乎对 Aβ 肽和 H 2 O 2诱导的毒性具有显着的神经保护作用。铜 (II) 络合物 [Cu II (H 2 bqch)Cl 2 ] 。3H 2 O (H 2
METHOD FOR PRODUCING ALCOHOL COMPOUND AND CATALYST THEREFOR
申请人:Aoyagi Yasutaka
公开号:US20120029195A1
公开(公告)日:2012-02-02
A method for producing an alcohol compound, wherein a carboxylic acid ester compound is reduced with hydrogen in the presence of a ruthenium complex which is obtained by reacting a pyridine compound having at least one optionally substituted amino group with a ruthenium compound.
Cd2+ are d10 metalions with very different toxicity level but similar binding properties to most organic ligands. Herein, a series of quinoline-pyridine conjugates are synthesized and evaluated for binding properties on both metalions. The effects of amino protons and number of N-donor atoms on the ligands binding to Cd2+ and Zn2+ were studied by UV–vis titration in aqueoussolution. The association
Chiral and Racemic Spin Crossover Polymorphs in a Family of Mononuclear Iron(II) Compounds
作者:Carlos Bartual-Murgui、Lucía Piñeiro-López、F. Javier Valverde-Muñoz、M. Carmen Muñoz、Maksym Seredyuk、José Antonio Real
DOI:10.1021/acs.inorgchem.7b02272
日期:2017.11.6
(SCO) compounds as well as controlling these parameters are of paramount importance for future applications. For this task, the occurrence of polymorphism, presented by a number of SCO complexes, may provide deep insight into the influence of the supramolecular organization on the SCO behavior. In this context, herein we present a novel family of mononuclear octahedral FeII complexes with formula cis-[Fe(bqen)(NCX)2]