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9,9-Difluorobispidine Analogues of Cisplatin, Carboplatin, and Oxaliplatin

MPG-Autoren
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Mitra,  Raja
Research Group Pörschke, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Goddard,  Richard
Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Pörschke,  Klaus-Richard
Research Group Pörschke, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Zitation

Mitra, R., Goddard, R., & Pörschke, K.-R. (2017). 9,9-Difluorobispidine Analogues of Cisplatin, Carboplatin, and Oxaliplatin. Inorganic Chemistry, 56(11), 6712-6724. doi:10.1021/acs.inorgchem.7b00836.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002D-8AF1-0
Zusammenfassung
As part of a comprehensive study of N-unsubstituted bispidines, the novel 9,9-difluorobispidine (D) has been synthesized. The compound crystallizes from pentane below 0 °C in the ordered-crystalline phase D-II and undergoes at 0–30 °C a stepwise endothermic phase transition to a dynamically disordered crystalline phase D-I; melting occurs at 227 °C. Single crystalline D-II has been subjected to X-ray structure analysis, revealing association of the molecules to form chains. Reaction of (1,5-hexadiene)PtCl2 with D affords {C7H10F2(NH)2}PtCl2 (D1), which can be converted by conventional routes to {C7H10F2(NH)2}Pt(cbdca)·5H2O (D2) and {C7H10F2(NH)2}Pt(C2O4) (D3). Compound D1 crystallizes solvent-free from water and is isomorphous to the solvent-free parent bispidine analogue (A1). The pentahydrate D2 is isomorphous to the bispidine and 9-oxabispidine homologues (A2 and C2), as shown by X-ray structure analyses. An increased polarity of the bispidine skeleton as a consequence of the high electronegativity of fluorine is seen as the reason for low cytotoxic potency of D1–D3.