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.
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.