Benzimidazol-2-ylidene platinum complexes exhibit anticancer activity, which is tuneablevia N-alkyl residues and ancillary ligands and is different from that of cisplatin.
of luminescent mononuclear and dinuclear N-heterocyclic carbene-containing gold(III) complexes has been synthesized and characterized. The X-ray crystal structures of most of the complexes have also been determined. Electrochemical studies reveal a ligand-centered reduction originated from the RC--N--CR moieties with no oxidation waves. Interestingly, one of the dinuclearcomplexes exhibited two distinct
A process for producing an arylamine is provided which is characterized by reacting an aromatic halogen compound with an aromatic amine in the presence of an organic salt selected from specific pyridinium salts, imidazolium salts and quaternary onium salts, a copper catalyst, and a base. Thus, the reaction of even an aromatic halogen compound substituted by an electron-donating group proceeds efficiently, and an inexpensive chlorinated aromatic compound or brominated aromatic compound is usable, and an arylamine, in particular a triarylamine or diarylamine, having a high purity can be produced at low cost.
Synthesis, structures and cytotoxic effects <i>in vitro</i> of <i>cis</i>- and <i>trans</i>-[Pt<sup>IV</sup>Cl<sub>4</sub>(NHC)<sub>2</sub>] complexes and their Pt<sup>II</sup> precursors
active both in wildtype and in p53-negative HCT116 colon carcinoma cells. In ethidium bromide saturation assays with isolated DNA, cis-(bis-NHC)PtII complexes such as 1 caused morphological DNA changes more pronounced than those initiated by cisplatin, while the corresponding cis-(bis-NHC)PtIV complexes such as 3 interacted with DNA in a less structure-modifying way.
四个新的双(N,N-二烷基苯并咪唑-2-亚苄基)二氯基铂(II)配合物2,其N-烷基取代基的尺寸不断增加(a:Me,b:Et,c:正丁基,d:正辛基)合成并用PhICl 2氧化,得到相应的[Pt IV Cl 4(N,N-二烷基苯并咪唑-2-亚基)2 ]复合物4,作为潜在的抗癌前药。已知的bis(N,N-二苄基咪唑-2-亚基)二氯基铂(II)配合物1同样被氧化为[Pt IV Cl 4(N,N-二苄基咪唑-2-亚基)2 ] 3。相反,用H 2 O 2或次氯酸盐氧化配合物1和2,或将四氯代配合物4中的氯代氢交换成氯代配体,无法得到[Pt IV Cl 4- n(OH)n(NHC)2型的可分离配合物。]。在MTT分析中,[PtII氯2(NHC) 2 ] / [铂IV氯4(NHC) 2 ]络合物耦合1 / 3, 2C / 4C,和反式- 2C /反式- 4C,轴承或者ñ -苄基或Ñ丁基的取代基,各对至
Synthesis, characterization and anticancer activity of palladium allyl complexes bearing benzimidazole-based N-heterocyclic carbene (NHC) ligands
The synthesis of twelve new palladiumallylcomplexes bearing benzimidazole-based NHC (NHC = N-heterocyclic carbene) ligands is reported. All the complexes were characterized by NMR and elemental analysis and, in the case of complex 5c, it was possible to confirm the connectivity by single crystal X-ray diffraction. The cationic palladiumallylcomplexes were tested toward 5 different cancer lines