title: On the bioreactivity of triorganotin aminobenzoates. Investigation of trialkyl and triarylyltin(IV) esters of 3-amino and 4-aminobenzoic acids.
abstract: The synthesis and study of trimethyl-, tributyl- and triphenyltin esters of the 3- and 4-aminobenzoic acids are reported. The triorganotin derivatives are characterized by elemental analyses, FT-IR and solution (1)H and (13)C NMR spectra. The structure of the trimethyltin 4-aminobenzoate is solved by X-ray diffraction and proves to be polymeric in nature with bridging carboxylates and trigonal bipyramidal tin(IV) environment. However, all the compounds become monomeric in solution with a tetrahedral tin coordination environment in chloroform and trigonal bipyramidal in DMSO due to coordination of the solvent as the NMR spectra have revealed. The compounds exhibit variable cytotoxic activity when tested against Kappa562 myelogenous leukaemia, HeLa cervical cancer and HepG2 hepatocellular carcinoma cell lines, with the butyl derivatives being the more effective and the methyl ones the less. Interestingly, their antibacterial action was significantly lower when tested against Escherichia coli, while not appreciable direct interaction with DNA has been observed. The above observations account for a mode of action that may be related to their potential interaction with cell membranes and the subsequent inhibition of various signaling processes.
authors.affiliation: Aristotle University of Thessaloniki, Department of Chemistry, Laboratory of Inorganic Chemistry, 541 24, Thessaloniki, Greece.
authors.forename: Demetrios
authors.initials: D
authors.lastname: Tzimopoulos
authors.forename: Ioannis
authors.initials: I
authors.lastname: Sanidas
authors.forename: Anastasia-C
authors.initials: AC
authors.lastname: Varvogli
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Czapik
authors.forename: Maria
authors.initials: M
authors.lastname: Gdaniec
authors.forename: Eleni
authors.initials: E
authors.lastname: Nikolakaki
authors.forename: Pericles D
authors.initials: PD
authors.lastname: Akrivos
mesh_terms: D062365:Aminobenzoates / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D000818:Animals; D045744:Cell Line, Tumor / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D004952:Esters / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D006801:Humans; D015394:Molecular Structure; D009947:Organotin Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D014961:X-Ray Diffraction
chemical_list: D062365:Aminobenzoates; D004952:Esters; D009947:Organotin Compounds