title: 3,5-Dimethyl-1-thiocarbamoylpyrazole and its Pd(II) complexes: synthesis, spectral studies and antitumor activity.
abstract: Complexes of the type [PdX2(tdmPz)] {X=Cl-(1), Br-(2); I-(3); SCN-(4); tdmPz=1-thiocarbamoyl-3,5-dimethylpyrazole} have been synthesized and characterized. Compound 1 was formed from the reaction between [PdCl2(CH3CN)2] and 1-thiocarbamoyl-3,5-dimethylpyrazole. Complexes 2, 3 and 4 were obtained by metathesis of the chloro groups from 1 by bromide, iodide and thiocyanate ions, respectively. All the compounds and cisplatin have been tested in vitro by MTT assay for their cytotoxicity against three murine cancer cell lines: mammary adenocarcinoma (LM3 and LMM3) and lung adenocarcinoma (LP07) as well towards normal murine peritoneal exudate cells (PEC). Promising cytotoxic effect against LM3 has been found for 3 showing IC50 equal to 24.5 microM which is comparable to the value obtained for cisplatin (30.3 microM).
authors.affiliation: Departamento de Química Geral e Inorgânica, Instituto de Química de Araraquara, UNESP-University Estadual Paulista, P.O. Box 355, Araraquara, São Paulo 14801-970, Brazil.
authors.forename: F V
authors.initials: FV
authors.lastname: Rocha
authors.forename: C V
authors.initials: CV
authors.lastname: Barra
authors.forename: A V G
authors.initials: AV
authors.lastname: Netto
authors.forename: A E
authors.initials: AE
authors.lastname: Mauro
authors.forename: I Z
authors.initials: IZ
authors.lastname: Carlos
authors.forename: R C G
authors.initials: RC
authors.lastname: Frem
authors.forename: S R
authors.initials: SR
authors.lastname: Ananias
authors.forename: M B
authors.initials: MB
authors.lastname: Quilles
authors.forename: A
authors.initials: A
authors.lastname: Stevanato
authors.forename: M C
authors.initials: MC
authors.lastname: da Rocha
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D005260:Female; D017737:Macrophages, Peritoneal / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008807:Mice, Inbred BALB C; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D010165:Palladium / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: C550100:3,5-dimethyl-1-thiocarbamoylpyrazole; D000970:Antineoplastic Agents; D009942:Organometallic Compounds; D011720:Pyrazoles; D010165:Palladium