Ni(II), Pd(II) and Cu(II) complexes with N-(dialkylthiocarbamoyl)-N′-picolylbenzamidines: Structure and activity against human MCF-7 breast cancer cells
摘要:
N-(Dialkylthiocarbamoyl)-N'-picolylbenzamidines (HLEt and HLMorph) react with NiCl2, CuCl2 and [PdCl2(MeCN)(2)] with the formation of complexes of the general composition [M(L-R)Cl] (M = Ni (1), Pd (2)) and the dimeric complexes [{Cu(L-R)Cl}(2)] (3). The molecular structures of complexes 1 and 2 exhibit a square-planar coordination sphere, in which the organic ligands coordinate in a S,N,N coordination mode. The two subunits of 3, the arrangement of each is similar to those of 1 and 2, are connected via two weak Cu-Cl' bonds. The copper complexes [(Cu(L-R)Cl)(2)] (3) are slowly oxidized under aerobic conditions to give [{Cu(*L-R)Cl)(2)] complexes (4), where H*L-R = N-(dialkylthiocarbamoyl)-N'-picolinoyl-benzamidines. Complexes 1 and 2 show a very weak reduction of the growth of human MCF-7 breast cancer cells. Complexes 4, however, possess a remarkable cytotoxicity with IC50 values within the range 0.40-1.05 mu M. Compounds 3 are likely converted to 4 under the conditions of the cytotoxicity assay, and consequently exhibit IC50 values very similar to those found for 4. (C) 2012 Elsevier Ltd. All rights reserved.
Propargyl‐Substituted Thiocarbamoylbenzamidines of Technetium and Rhenium: Steps towards Bioconjugation with Use of Click Chemistry
作者:Juan Daniel Castillo Gomez、Adelheid Hagenbach、Ulrich Abram
DOI:10.1002/ejic.201601039
日期:2016.12
were analyzed by NMR, IR, and mass spectrometry as well as by X-ray diffraction. A similar coupling procedure has been applied for an azido-modified angiotensin-II peptide, which gives the desired rhenium(V) bioconjucate with good yields. The ease of this coupling and the stability of the conjugate recommends such tetradentate thiocarbamoylbenzamidines also for clinically relevant bioconjugates with
摘要:合成了一种新的炔丙基取代的硫代氨基甲酰基苯甲脒。该化合物作为四齿配体并与 ReVO}3+ 和 TcVO}3+ 核形成稳定的复合物。所得配合物与苄基叠氮化物的“点击”偶联产生原型三唑衍生物,通过 NMR、IR、质谱以及 X 射线衍射对其进行分析。类似的偶联程序已应用于叠氮修饰的血管紧张素 II 肽,它以良好的产率提供所需的铼 (V) 生物偶联物。这种偶联的简易性和偶联物的稳定性推荐此类四齿硫代氨基甲酰基苯甲脒也用于具有 99mTc 的临床相关生物偶联物。
The formation of tetrameric oxotechnetium(V) and oxorhenium(V) complexes by cyclisation of a potentially multidentate thiocarbohydrazide derivative
作者:Dirk Hauenstein、Ulrich Abram
DOI:10.1016/j.inoche.2011.04.037
日期:2011.8
Abstract Tetrameric complexes of the composition [MO(L1)]4 (M = Tc, Re), where (L1)3– represents an asymmetric, trianionic cyclisation product with thiocarbamoylbenzamidinato and mercaptotriazolato donor sites, were formed duringreactions of [TcOCl4]– or [ReOCl4]– with a potentially multidentate ligand derived from thiocarbohydrazide and N-[N',N'-diethylamino(thiocarbonyl)]benzimidoyl chloride.
Rhenium(V) complexes with tridentate P,N,S ligands
作者:Jennifer Schroer、Ulrich Abram
DOI:10.1016/j.poly.2011.11.023
日期:2012.2
ligands with P,N,S donor sets (HLdiethyl and HLmorph) were prepared from reactions of N-(dialkyl)thiocarbamoylbenzimide chlorides with 2-(diphenylphosphinomethyl)aniline. They readily react with (NBu4)[ReOCl4] under formation of air-stable [ReOCl2(LR)] complexes, in which the tridentate ligands coordinate meridionally. A similar coordination mode is observed in the nitridorhenium(V) complex [ReN(OReO3)(PPh3)(Ldiethyl)]
[MOCl4]–complexes (M = Re, Tc) react with thianes derived from N-[(diethylamino)(thiocarbonyl)]benzamidoyl chloride and 2-mercaptophenol (HL1) and 2-mercaptoaniline (HL2) under C–Sbondcleavage and formation of oxorhenium(V) and oxotechnetium(V) complexes with the resulting decomposition products 2-mercaptophenol and N-[(dialkylamino)thiocarbonyl]-N′-2-mercaptophenyl)benzamidine (H2L2a), respectively
We report nickel(ii) and copper(ii) complexes containing the benzamidine–thiosemicarbazone ligand together with DFT, enzyme kinetics and in vitro biological applications such as DNA/BSA affinities and anticancer properties.