title: Synthesis, characterization and cytotoxic activity of substituted benzyl iminoether Pt(II) complexes of the type cis- and trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-R}2] (R=Me, OMe, F). X-ray structure of trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-F}2].
abstract: New substituted benzyl iminoether derivatives of the type cis- and trans-[PtCl(2){E-N(H)C(OMe)CH(2)-C(6)H(4)-p-R}(2)] (R=Me (1a, 2a), OMe (3a, 4a), F (5a, 6a)) have been synthesized and characterized by elemental analyses, FT-IR spectroscopy and NMR techniques. The iminoether ligands are in the E configuration, which is stable in solution and in the solid state, as confirmed by the (1)H NMR data. Complex trans-[PtCl(2){E-N(H)C(OMe)CH(2)-C(6)H(4)-p-F}(2)] (6a) was also characterized by an X-ray diffraction study. Complexes 1a-6a have been tested against a panel of human tumor cell lines in order to evaluate their cytotoxic activity. cis-Isomers were significant more potent than the corresponding trans-isomers against all tumor cell lines tested; moreover, complexes 1a and 5a showed IC(50) values from about 2-fold to 6-fold lower than those exhibited by cisplatin, used as reference platinum anticancer drug.
authors.affiliation: Department of Chemical Processes of Engineering, University of Padova, Via F. Marzolo 9, 35131 Padova, Italy. silvia.mazzega@unipd.it
authors.forename: Silvia
authors.initials: S
authors.lastname: Mazzega Sbovata
authors.forename: Frazia
authors.initials: F
authors.lastname: Bettio
authors.forename: Christine
authors.initials: C
authors.lastname: Marzano
authors.forename: Augusto
authors.initials: A
authors.lastname: Tassan
authors.forename: Mirto
authors.initials: M
authors.lastname: Mozzon
authors.forename: Roberta
authors.initials: R
authors.lastname: Bertani
authors.forename: Franco
authors.initials: F
authors.lastname: Benetollo
authors.forename: Rino A
authors.initials: RA
authors.lastname: Michelin
mesh_terms: D045744:Cell Line, Tumor; D004354:Drug Screening Assays, Antitumor; D004987:Ethers / Q000737:chemistry*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009944:Organoplatinum Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D004987:Ethers; D009944:Organoplatinum Compounds