Copper(<scp>ii</scp>) thiosemicarbazone complexes induce marked ROS accumulation and promote nrf2-mediated antioxidant response in highly resistant breast cancer cells
作者:Angela Sîrbu、Oleg Palamarciuc、Maria V. Babak、Jia Min Lim、Kateryna Ohui、Eva A. Enyedy、Sergiu Shova、Denisa Darvasiová、Peter Rapta、Wee Han Ang、Vladimir B. Arion
DOI:10.1039/c7dt00283a
日期:——
their copper(II) complexes exhibit moderate watersolubility and good stability in aqueous environment, determined by investigating their proton dissociation and complex formation equilibria. The copper(II) complexes showed moderate anticancer activity in established human cancer cell lines, while the proligands were devoid of cytotoxicity. The anticancer activity of the copper(II) complexes correlates
一系列在末端氮原子(H,Me,Et,Ph)上具有不同取代基的3-甲酰基-4-羟基苯磺酸硫代氨基甲酮(或5-磺酸钠-水杨醛硫代氨基甲酮钠)及其铜(II已通过元素分析,光谱技术(IR,UV-vis,1 H NMR),ESI质谱,X射线晶体学和循环伏安法制备并表征了复合物。通过研究它们的质子解离和复合物形成平衡,可确定该配体和它们的铜(II)配合物在水环境中具有适度的水溶性和良好的稳定性。铜(二))复合物在已建立的人类癌细胞系中显示出中等的抗癌活性,而配体没有细胞毒性。铜(II)配合物的抗癌活性与其在细胞中诱导ROS积累的能力相关,与其在生物窗口内的氧化还原电位一致,从而触发响应于ROS侵害的抗氧化防御机制的激活。这些研究为研究ROS诱导铜(II)配合物作为癌症化疗中预期的抗增殖剂铺平了道路。
Water‐Soluble Palladium(II) Sulfonated Thiosemicarbazone Complexes: Facile Synthesis and Preliminary Catalytic Studies in the Suzuki–Miyaura Cross‐Coupling Reaction in Water
作者:Leah C. Matsinha、Jincheng Mao、Selwyn F. Mapolie、Gregory S. Smith
DOI:10.1002/ejic.201500588
日期:2015.8
very stable in water at 70 °C. Consequently, preliminarycatalytic experiments show the water-soluble complexes to be efficient catalyst precursors in the Suzuki–Miyaura cross-coupling reaction in water. No evidence of homo-coupling was observed and the water-soluble complexes demonstrated versatility in coupling substrates containing various functional groups.
one-dimensional coordination polymer network. Reaction of the ligand with metal acetates produced following complexes: [Cu(HL)]2, NiHL and ZnHL. All complexes were characterized by means of elemental analysIs, IR spectroscopy, and ESI-Mass measurements. The dinuclear structure of the copper complex was determined by single-crystal X-ray crystallography and showed the square pyramidal geometry for each
Catalytic isomerization–hydroformylation of olefins by rhodium salicylaldimine pre-catalysts
作者:Pamela N. Sekoto、Tseliso M. Magengenene、Leah C. Matsinha、Richard Tia、James Darkwa、Banothile C. E. Makhubela
DOI:10.1039/d0nj01970d
日期:——
A series of new Schiff-base rhodium(I) water-soluble complexes (C1–C3), were prepared and characterized. These complexes served as catalyst precursors for the hydroformylation of 1-octene and resulted in excellent substrate conversions (>98%) with 100% chemoselectivities to aldehydes, under mild conditions. Notably, good regioselectivities towards branched aldehydes were observed clearly demonstrating
Structural studies and applications of water soluble (phenoxy)imine palladium(II) complexes as catalysts in biphasic methoxycarbonylation of 1-hexene
作者:Saphan O. Akiri、Stephen O. Ojwach
DOI:10.1016/j.jorganchem.2021.121812
日期:2021.6
6-dimethylphenyl)imino)methyl)phenol (L5) and 2-((2,6-diisopropylphenyl)imino)methyl)phenol (L6) with Pd(OAc)2 gave the corresponding complexes [Pd(L4)2] (PdL4), [Pd(L5)2] (PdL5) and [Pd(L6)2] (PdL6) in good yields. Solid state structures of complexes PdL1 and PdL4 established the formation of bis(chelated) square planar neutral compounds. All the complexes formed active catalysts in the methoxycarbonylation