Nickel complexes as efficient catalysts in multicomponent synthesis of tetrahydropyridine derivatives
作者:Andrei N. Yankin、Maksim V. Dmitriev
DOI:10.1080/00397911.2020.1803357
日期:2020.11.16
Abstract Ni(Salen) complexes as an efficient, homogeneous catalysts revealed a catalytic activity toward the one-pot synthesis of tetrahydropyridine derivatives through the pseudo five-component reactions of aromatic aldehydes, aromatic amines, and β-ketoesters in ethanol at room temperature. Mild reaction conditions, good yields, high diastereoseletivity, operational simplicity, and the absence of
Oxovanadium(V) Complexes With Schiff Base Ligands: Synthesis, Structure, and Catalytic Property
作者:Ning Wang、Jing-Yi Guo、Ji-Yong Hu
DOI:10.1080/15533174.2013.768655
日期:2014.1.2
oxovanadium(V) complexes, [VOL1]·H2O (1) and [VOL2] (2). Both complexes have been characterized by elemental analysis, IR, and single-crystal X-ray diffraction methods. The V atoms in the complexes are in distorted square pyramidal coordination. The dinegative Schiff baseligands coordinate to the metal atoms through phenolate and imine donor atoms. Both complexes have effective catalytic property for
[VO(acac)2 ]与N,N'-亚乙基双(3-乙氧基水杨亚胺)(H 2 L 1)和N,N'-亚乙基双(3-甲基水杨酸-亚胺)(H 2 L 2)的反应分别在甲醇中提供两种新的氧钒(V)络合物[VOL 1 ]·H 2 O(1)和[VOL 2](2)。两种配合物均已通过元素分析,红外光谱和单晶X射线衍射方法进行了表征。络合物中的V原子处于扭曲的方形金字塔配位状态。阴性席夫碱配体通过酚盐和亚胺供体原子与金属原子配位。两种配合物均具有对亚磺酰氧化反应的有效催化性能。
Coordinated Design of Cofactor and Active Site Structures in Development of New Protein Catalysts
of the Schiff base ligand in the activesite. On the basis of these results, we have successfully controlled the enantioselectivity in the sulfoxidation of thioanisole by changing the size of substituents at the 3 and 3' positions. This is the first example of an enantioselective enzymatic reaction regulated by the design of metal complex in the proteinactivesite.
Synthesis and Structure of Cobalt(III) Complex with Cyanomethylene and N,N′-Ethylenebis(3-methylsalicylideneiminate)
作者:M. V. Novozhilova、D. V. Spiridonova、M. P. Karushev、A. M. Timonov
DOI:10.1134/s1070363222020165
日期:2022.2
Abstract The new complex [CoIII(3-CH3Salen)(CH2CN)]·CH3CN was synthesized and its crystal structure was determined by the X-ray diffraction analysis. The cyanomethylene ligand is bound to the metallocenter by a Co‒C bond. In the crystalline state, an organometallic polymer structure is formed, in which metal atoms are interconnected by cyanomethylene bridges.
Effect of Ligand Structure on Ethylene Oligomerization over Salicylaldehyde Imine Nickel Complexes: Experiments and Calculations
作者:Liduo Chen、Jinyan Tan、Tianyu Lan、Hongliang Huo、Liyuan Sun、Yan Jiang、Na Zhang、Cuiqin Li、Jun Wang
DOI:10.1002/aoc.7276
日期:2023.12
different electron-donating and electron-withdrawing groups on benzenerings were synthesized, using ethylenediamine, salicylaldehyde derivatives with different substituents and nickel chloride hexahydrate as raw materials. Structure characterization, such as elemental analysis, Fourier transform infrared (FT-IR), nuclearmagneticresonance (NMR), ultraviolet–visible (UV–Vis), and electrospray ionization