The ruthenium(II) complexes have been examined for the transfer hydrogenation of various aromatic, heterocycle and cyclic ketones. The formation of ruthenium(II) hydride is confirmed by 1H- NMR and is proposed as the catalytic intermediate in this reaction. Under the optimized conditions, these ruthenium complexes served as excellent catalyst precursors which smoothly reduce the ketones with conversion
Direct Synthesis of Amides from Coupling of Alcohols and Amines Catalyzed by Ruthenium(II) Thiocarboxamide Complexes under Aerobic Conditions
作者:Elangovan Sindhuja、Rengan Ramesh、Sundarraman Balaji、Yu Liu
DOI:10.1021/om500556b
日期:2014.8.25
the ruthenium(II) thiocarboxamide complexes were generated as highly efficient catalysts for synthesis of secondary or tertiary amides by coupling of amines and alcohols with low catalyst loading, and the maximum yield was obtained up to 97%. The coupling reaction can be readily carried out under mild aerobic conditions, and release of water is the only byproduct. Further, the effect of substituents
Cationic arene ruthenium(II) complexes bearing N, S chelating thiocarboxamides: Synthesis, structure, characterization and catalytic oxidation of alcohols
作者:M. Ulaganatha Raja、R. Ramesh
DOI:10.1016/j.jorganchem.2011.10.018
日期:2012.2
A series of conformationallyrigid half-sandwich diamagnetic cationic organoruthenium(II) complexes with the general formula [Ru(η6-p-cymene)(AsPh3)(L)] [where, L = pyridine-2-thiocarboxamide ligand] have been synthesized from the reaction of [Ru(η6-p-cymene)Cl2]2 with bidentate thiocarboxamide ligands and AsPh3 in methanol in 1:2 M ratio. All the arene ruthenium(II) complexes were fully characterized
Palladium(ii) thiocarboxamide complexes: synthesis, characterisation and application to catalytic Suzuki coupling reactions
作者:Elangovan Sindhuja、Rengan Ramesh、Yu Liu
DOI:10.1039/c2dt12243j
日期:——
and were found to have much greater activity, without using any promoting additives or phase transfer agent underaerobicconditions. Higher reaction rates are obtained by varying R substituents on the aromatic ring of pyridine-2-thiocarboxamide. The effect of other variables on the cross-coupling reaction, such as temperature, solvent and base, is also reported.
Synthesis and structure of nickel(<scp>ii</scp>) thiocarboxamide complexes: effect of ligand substitutions on DNA/protein binding, antioxidant and cytotoxicity
Four low spin d8 nickel(II) square planar complexes with general formula [Ni(L)2] (where L = monobasic N, S bidentate thiocarboxamides) have been synthesized from the reaction of Ni(OAc)2·4H2O with 2 equivalent of thiocarboxamide ligands in ethanol. The complexes have been fully characterized by analytical, spectral (FT-IR, UV-Vis, 1H and 13C NMR) and singlecrystal X-ray methods. Molecular structure
由Ni(OAc)2 ·4H 2 O与Ni(OAc)2 ·4H 2 O的反应合成了四种通式[Ni(L)2 ]的低自旋d 8镍(II)方形平面络合物(其中L =一元N,S二齿硫代羧酰胺)。乙醇中有2当量的硫代羧酰胺配体。通过分析,光谱(FT-IR,UV-Vis,1 H和13 C NMR)和单晶X射线方法对配合物进行了全面表征。一种配合物的分子结构表明硫代羧酰胺配体通过吡啶氮和硫醇盐硫与镍的单阴离子二齿配位,并显示出正方形的平面几何形状。镍的结合相互作用II)通过电子和发射光谱方法研究了硫代羧酰胺与小牛胸腺DNA(CT-DNA)的配合物,发现配合物1-4可通过嵌入模式与CT-DNA相互作用。DNA裂解实验表明,所有复合物在H 2 O 2等活化剂的存在下均裂解pUC19超螺旋DNA 。CD光谱研究表明,复合物与DNA的结合不会导致CT-DNA构象发生任何重大变化。此外,镍的蛋白质结合能力(II)通