Dinuclear bridged biphosphinic and mononuclear cyclopalladated complexes of benzylamines: Synthesis, structural characterization and antitumor activity
作者:Kazem Karami、Mahboubeh Hosseini kharat、Hojjat Sadeghi-Aliabadi、Janusz Lipkowski、Mina Mirian
DOI:10.1016/j.poly.2012.11.002
日期:2013.2
Reaction of chloro-bridged dinuclear palladacycles, [Pd-2(C,N)-C6H4CH2NH(R)}(2)(mu-Cl)(2)](R = Et (1a); R = t-Bu (1b)) with pyridine and PPh3 in the 1:2 M ratio at room temperature was used to prepare the mononuclear complexes, [Pd(C,N)-C6H4CH2NH(R)Cl(L)] (R = Et and L = Py (2a); R = t-Bu and L = PPh3 (2b)). Bridged biphosphinic palladacycle, [Pd-2(C,N-dmba)(2)(mu-dppe)(Cl)(2)] (2c), (where dmba = N,N-dimethylbenzylamine and dppe = 1,2-bis(diphenylphosphino)ethane) has been also synthesized. The complexes were fully characterized by elemental analysis, IR and NMR spectroscopies. In addition, the solid structures of palladacycles 2a and 2c were studied by single-crystal X-ray crystallography. In vitro cytotoxicity assays of the cyclopalladated complexes, (2a-2c) and cisplatin were evaluated against the Hela (human cervix carcinoma), HT-29 (colon cancer cell line), K562 (leukemia cancer cell line) and MDA-MB-468 (human breast carcinoma). The complexes 2a-2c display IC50 values in a mu M range better than that of the antitumor drug cisplatin. (C) 2012 Elsevier Ltd. All rights reserved.