title: Synthesis, characterization and Stat3 inhibitory properties of the prototypical platinum(IV) anticancer drug, [PtCl3(NO2)(NH3)2] (CPA-7).
abstract: This paper describes a reinvestigation of the literature concerning the synthesis and structural characterization of the platinum(IV)-based anticancer drug known as CPA-7 and believed to be the compound fac-[PtCl3(NO2)(NH 3)2]. CPA-7 has previously been extensively investigated for its ability to control tumor cell growth by inhibition of Stat3 signaling, but very little information is available concerning its synthesis or spectroscopic properties. A reproducible synthetic route is shown to produce an active material which is characterized by IR and (1)H, (14)N, (15)N, and (195)Pt NMR spectroscopy, and single crystal X-ray crystallography. The freshly prepared drug is obtained as a single isomer which may in fact be fac- or mer-[PtCl3(NO2)(NH3)2], but recrystallization resulted in a disordered crystal containing approximately equal amounts of the two geometric isomers.
authors.affiliation: Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: Shalyn L
authors.initials: SL
authors.lastname: Littlefield
authors.forename: Michael C
authors.initials: MC
authors.lastname: Baird
authors.forename: Aikaterini
authors.initials: A
authors.lastname: Anagnostopoulou
authors.forename: Leda
authors.initials: L
authors.lastname: Raptis
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D017606:Chlorine Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008958:Models, Molecular; D008968:Molecular Conformation; D041681:NIH 3T3 Cells; D010766:Phosphorylation / Q000187:drug effects; D019000:Phosphotyrosine / Q000378:metabolism; D017319:Photosensitizing Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D017671:Platinum Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D050796:STAT3 Transcription Factor / Q000037:antagonists & inhibitors* / Q000378:metabolism; D013055:Spectrophotometry, Infrared; D014158:Transcription, Genetic / Q000235:genetics
chemical_list: D000970:Antineoplastic Agents; D017606:Chlorine Compounds; D017319:Photosensitizing Agents; D017671:Platinum Compounds; D050796:STAT3 Transcription Factor; C529200:trichloronitritodiammineplatinum(IV); D019000:Phosphotyrosine