Platinum(II), platinum(IV), and palladium (II) complexes of amino substituted phosphine oxides: synthesis, characterization, and antitumor activity
Abstract
The complexes [Pt(dapo)2Cl2], [PtNH3(dapo)Cl2], [Pt(py)(dapo)Cl2], [Pt(mbpo)Cl2].H2O, [Pt(mbpo)(OH)2Cl2].H2O, [Pd(dapo)2Cl2], and [Pd(mbpo)Cl2], where dapo is dimethyl aminomethylphosphine oxide and mbpo is methyl bis(aminomethyl)phosphite oxide have been synthesized and characterized by elemental analyses, electric conductivity, infrared, 1H NMR and electronic spectra. The ligands are found to be coordinated only via the amino groups. The complexes are of cis-square planar configuration with the exception of [Pt(mbpo)(OH)2Cl2].H2O which is pseudo-octahedral. An in vivo antitumor screening of the complexes against Leukemia L1210 was performed. A considerable activity (T/C = 233%) was observed for [PtNH3(dapo)Cl2]. The activity of the remaining complexes was below the accepted criterion.
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