Highly efficient palladium(<scp>ii</scp>) hydrazone based catalysts for the Suzuki coupling reaction in aqueous medium
作者:Subramanian Muthumari、Rengan Ramesh
DOI:10.1039/c6ra06734d
日期:——
and reveal the presence of a distorted square planar geometry around the Pd ion. The complexes 1–5 (0.05 mol%) have been found to be a highly active catalytic system in the mono and double Suzuki–Miyaura cross coupling reaction of deactivated aryl and heteroaryl bromides with different types of aryl boronic acids in neat water and the maximum yield was up to >99%. Notably, these catalysts work well with
Synthesis, molecular structure and electrochemical properties of nickel(<scp>ii</scp>) benzhydrazone complexes: influence of ligand substitution on DNA/protein interaction, antioxidant activity and cytotoxicity
作者:Ramasamy Raj Kumar、Rengan Ramesh
DOI:10.1039/c5ra19530f
日期:——
A series of new nickel(II) benzhydrazone complexes having the general formula [Ni(L)2] (where L = thiophene aldehyde benzhydrazone) have been synthesized via the reaction of Ni(OAc)2·4H2O with 2 equivalents of benzhydrazone ligands in a DMF/ethanol medium. The complexes have been characterized by analytical, spectral (FT-IR, UV-vis, NMR and ESI-mass) and single-crystal X-ray crystallography methods
New halfsandwich arene ruthenium(II) complexes of the type [Ru(arene)Cl(L)] (where arene = benzene and p-cymene, L = thiophene benzhydrazone ligands) have been synthesized from the reactions of the neutral precursor [Ru(arene) (μ-Cl) Cl]2 and the corresponding benzhydrazone ligand. All the complexes were completely characterized by elemental analysis and additionally by IR, UV–Vis, 1H NMR and ESI-MS
由中性前体[Ru]的反应合成了[Ru(arene)Cl(L)]类型的新的半夹心芳烃钌(II)配合物(其中芳烃=苯和对-Cymene,L =噻吩苯并zone配体) (芳烃)(μ-Cl)Cl] 2和相应的苯并zone配体。所有的络合物都通过元素分析和红外,紫外-可见,1完全表征。1 H NMR和ESI-MS光谱法。配合物6和7的固态结构通过单晶X射线衍射分析确定,其在金属中心周围表现出典型的伪八面体几何形状。评价了该复合物在癌细胞(HeLa,MDA-MB-231和Hep G2)和非癌细胞(NIH3T3)上的抗增殖活性。通常,与引入H,Cl和Br取代基的配合物相比,含有释放电子的OCH 3取代基的配合物具有潜在的抗癌活性。而且,p-苏木精复合物比苯衍生物具有更高的细胞毒性,这表明芳烃上的取代基在化合物的生物活性中起着至关重要的作用。此外,通过AO-EB,Hoechst 33258染色和膜联蛋白-V
Iodine-catalysed oxidative cyclisation of acylhydrazones to 2,5-substituted 1,3,4-oxadiazoles
作者:Ganesh Majji、Saroj Kumar Rout、Srimanta Guin、Anupal Gogoi、Bhisma K. Patel
DOI:10.1039/c3ra44897e
日期:——
An environmentally benign synthesis of 2,5-disubstituted 1,3,4-oxadiazoles has been developed starting from N-aroylhydrazones and N-acetylhydrazones at room or ambient temperature using a catalytic quantity of iodine in the presence of an aqueous hydrogen peroxide oxidant.