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Sharma HK, Metta-Magaña AJ, Pannell KH. Aminomethylation of Aminoferrocene, [(η 5-C 5H 5)Fe(η 5-C 5H 4NH 2)], and (Anilino)chromiumtricarbonyl, [(η 6-C 6H 5NH 2)Cr(CO) 3], by O-Triethylsilyl-hemiaminal, (Et 3SiOCH 2NMe 2): The Role of Disparate Organometallic Electronic Effects in Modifying Product Outcomes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hemant K. Sharma
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas. 79968, United States
| | - Alejandro J. Metta-Magaña
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas. 79968, United States
| | - Keith H. Pannell
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas. 79968, United States
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2
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Mbaba M, Dingle LMK, Cash D, Mare JADL, Laming D, Taylor D, Hoppe HC, Edkins AL, Khanye SD. Repurposing a polymer precursor: Synthesis and in vitro medicinal potential of ferrocenyl 1,3-benzoxazine derivatives. Eur J Med Chem 2019; 187:111924. [PMID: 31855792 DOI: 10.1016/j.ejmech.2019.111924] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 01/12/2023]
Abstract
Cancer and malaria remain relevant pathologies in modern medicinal chemistry endeavours. This is compounded by the threat of development of resistance to existing clinical drugs in use as first-line option for treatment of these diseases. To counter this threat, strategies such as drug repurposing and hybridization are constantly adapted in contemporary drug discovery for the expansion of the drug arsenal and generation of novel chemotypes with potential to avert or delay resistance. In the present study, a polymer precursor scaffold, 1,3-benzoxazine, has been repurposed by incorporation of an organometallic ferrocene unit to produce a novel class of compounds showing in vitro biological activity against breast cancer, malaria and trypanosomiasis. The resultant ferrocenyl 1,3-benzoxazine compounds displayed high potency and selectivity against the investigated diseases, with IC50 values in the low and sub-micromolar range against both chloroquine-sensitive (3D7) and resistant (Dd2) strains of the Plasmodium falciparum parasite. On the other hand, antitrypanosomal (Trypanosoma brucei brucei) potencies were observed between 0.15 and 38.6 μM. The majority of the compounds were not active against breast cancer cells (HCC70), however, for the toxic compounds, IC50 values ranged from 11.0 to 30.5 μM. Preliminary structure-activity relationships revealed the basic oxazine sub-ring and lipophilic benzene substituents to be conducive for biological efficacy of the ferrocenyl 1,3-benzoxazines reported in the study. DNA interaction studies performed on the most promising compound 4c suggested that DNA damage may be one possible mode of action of this class of compounds.
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Affiliation(s)
- Mziyanda Mbaba
- Faculty of Science, Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa.
| | - Laura M K Dingle
- Faculty of Science, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa; Biomedical Biotechnology Research Unit, Rhodes University, Grahamstown, 6140, South Africa
| | - Devon Cash
- Faculty of Science, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa; Biomedical Biotechnology Research Unit, Rhodes University, Grahamstown, 6140, South Africa
| | - Jo-Anne de la Mare
- Faculty of Science, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa; Biomedical Biotechnology Research Unit, Rhodes University, Grahamstown, 6140, South Africa; Centre for Chemico- and Biomedicinal Research, Rhodes University, Grahamstown, 6140, South Africa
| | - Dustin Laming
- Faculty of Science, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa; Centre for Chemico- and Biomedicinal Research, Rhodes University, Grahamstown, 6140, South Africa
| | - Dale Taylor
- Division of Clinical Pharmacology, Faculty of Medicine, University of Cape Town, Observatory, Cape Town, 7925, South Africa
| | - Heinrich C Hoppe
- Faculty of Science, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa; Centre for Chemico- and Biomedicinal Research, Rhodes University, Grahamstown, 6140, South Africa
| | - Adrienne L Edkins
- Faculty of Science, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa; Biomedical Biotechnology Research Unit, Rhodes University, Grahamstown, 6140, South Africa; Centre for Chemico- and Biomedicinal Research, Rhodes University, Grahamstown, 6140, South Africa
| | - Setshaba D Khanye
- Faculty of Science, Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa; Centre for Chemico- and Biomedicinal Research, Rhodes University, Grahamstown, 6140, South Africa; Division of Pharmaceutical Chemistry, Faculty of Pharmacy, Rhodes University, Grahamstown, 6140, South Africa.
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Díaz C, Ferraudi G, Lappin AG, Oliver A, Isaacs M. Synthesis and characterization of low-melting ferrocenyl salts: a study of thermal and photochemical redox reactions. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1504036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Carlos Díaz
- Departamento de Química Inorgánica, Pontificia Universidad Católica de Chile, Santiago, Chile
- Instituto de Ciencias, Universidad de Las Américas, Sede Providencia, Santiago, Chile
| | - Guillermo Ferraudi
- Notre Dame Radiation Research Laboratory, University of Notre Dame, South Bend, IN, USA
| | - A. Graham Lappin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Allen Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Mauricio Isaacs
- Departamento de Química Inorgánica, Pontificia Universidad Católica de Chile, Santiago, Chile
- Centro de Investigación en Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago, Chile
- UC Energy Research Center, Pontificia Universidad Católica de Chile, Santiago, Chile
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4
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Zábranský M, Štěpnička P. Crystal structure of {[1'-(di-phenyl-phosphino)ferrocen-yl]meth-yl}di-methyl-ammonium chloride monohydrate. Acta Crystallogr E Crystallogr Commun 2017; 73:1539-1541. [PMID: 29250376 PMCID: PMC5730313 DOI: 10.1107/s2056989017013408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 09/19/2017] [Indexed: 11/10/2022]
Abstract
Individual ions and the solvating water mol-ecule constituting the structure of the title compound, [Fe(C8H13N)(C17H14P)]Cl·H2O, assemble into dimeric units located around crystallographic inversion centers via N-H⋯Cl and O-H⋯Cl hydrogen bonds. These discrete fragments are further inter-connected into chains by C-H⋯O inter-actions. The disubstituted ferrocene core in the {[1'-(di-phenyl-phosphino)ferrocen-yl]meth-yl}di-methyl-ammonium cation has an approximate synclinal eclipsed conformation and is tilted by 3.40 (11)°.
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Affiliation(s)
- Martin Zábranský
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Petr Štěpnička
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
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Ndiaye M, Samb A, Diop L, Maris T. Crystal structure of (ferrocenylmeth-yl)di-methyl-ammonium hydrogen oxalate. Acta Crystallogr E Crystallogr Commun 2015; 71:947-9. [PMID: 26396763 PMCID: PMC4571364 DOI: 10.1107/s205698901501333x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 07/11/2015] [Indexed: 06/05/2023]
Abstract
The crystal structure of the title salt, [Fe(C5H5)(C8H13N)](HC2O4), consists of discrete (ferrocenylmeth-yl)di-methyl-ammonium cations and hydrogen oxalate anions. The anions are connected through a strong O-H⋯O hydrogen bond, forming linear chains running parallel to [100]. The cations are linked to the anions through bifurcated N-H⋯(O,O') hydrogen bonds. Weak C-H⋯π inter-actions between neighbouring ferrocenyl moieties are also observed.
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Affiliation(s)
- Mamadou Ndiaye
- Laboratoire des Produits Naturels, Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Abdoulaye Samb
- Laboratoire des Produits Naturels, Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Libasse Diop
- Laboratoire de Chimie Minérale et Analytique, Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Thierry Maris
- Département de Chimie, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montréal, Québec, H3C 3J7, Canada
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Klingele J. Low-melting complexes with cationic side chains – Phosphonium-, ammonium- and imidazolium-tagged coordination compounds. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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1-(2-Chloro-1,1,1,3,3,3-hexafluoroprop-2-yl)ferrocene as the first stable representative of chloromethylferrocenes. Russ Chem Bull 2011. [DOI: 10.1007/s11172-011-0118-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Wang B. (Ferrocenylmethyl)dimethylammonium bromide. Acta Crystallogr Sect E Struct Rep Online 2010; 66:m686. [PMID: 21579325 PMCID: PMC2979461 DOI: 10.1107/s1600536810018453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 05/18/2010] [Indexed: 11/10/2022]
Abstract
The title compound, [Fe(C5H5)(C8H13N)]Br, is isotypic with the analogous chloride compound. The Fe—C bond lengths are in the range 2.020 (6)–2.048 (7) Å. In the crystal, the cations and bromide anions are connected by N+—H⋯Br− hydrogen bonds.
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Horie M, Suzaki Y, Osakada K. Chemical and Electrochemical Formation of Pseudorotaxanes Composed of Alkyl(ferrocenylmethyl)ammmonium and Dibenzo[24]crown-8. Inorg Chem 2005; 44:5844-53. [PMID: 16060638 DOI: 10.1021/ic050215f] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protonation of p-xylylaminomethylferrocene (1) and n-hexylaminomethylferrocene (2) by HCl and NH(4)PF(6) forms the ferrocenylmethyl(alkyl)ammonium salt. Inclusion of the compounds by dibenzo[24]crown-8 (DB24C8) produces [2]pseudorotaxanes, [(DB24C8)(1-H)](+)(PF(6)) and [(DB24C8)(2-H)](+)(PF(6)), respectively. X-ray diffraction of the former product indicates an interlocked structure composed of the axis and the macrocyclic molecule. Intermolecular N-H...O and C-H...O interactions and stacking of the aromatic planes are observed. [(DB24C8)(1-H)](+)(PF(6)), in the solid state, is characterized by IR spectroscopy and elemental analyses. A similar reaction of 1,1'-bis(p-xylylaminomethyl)ferrocene (3) forms a mixture of [2] and [3]pseudorotaxanes, [(DB24C8)(3-H(2))](2+)(PF(6))(2) and [(DB24C8)(2)(3-H(2))](2+)(PF(6))(2). The latter product having two DB24C8 molecules is isolated and characterized by X-ray crystallography. Formation of these pseudorotaxanes in a CD(3)CN solution is evidenced by (1)H NMR and mass spectrometry. Electrochemical oxidation of 1-3 at 0.4 V (vs Ag(+)/Ag) in the presence of TEMPOH (1-hydroxy-2,2,6,6-tetramethylpiperidine) and DB24C8 affords the corresponding pseudorotaxanes. The ESR spectrum of the reaction mixture indicates the formation of a TEMPO radical in high yield. Details of the conversion of the dialkylamino group of the ligand to the dialkylammonium group are investigated by using a flow electrolysis method linked to spectroscopic measurements. The proposed mechanism for the reaction involves the ferrocenium species, formed by initial oxidation, which undergoes electron transfer from nitrogen to the Fe(III) center, producing a cation radical at the nitrogen. Transfer of hydrogen from TEMPOH to the cation radical and inclusion of the resulting dialkylammonium species by DB24C8 yields the pseudorotaxanes.
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Affiliation(s)
- Masaki Horie
- Chemical Resources Laboratory, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan
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Studies on the characteristics of LB films of N,N-dimethylferrocenylmethylhexadecylammonium bromide. Colloids Surf A Physicochem Eng Asp 2005. [DOI: 10.1016/j.colsurfa.2004.10.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Horie M, Suzaki Y, Osakada K. Formation of Pseudorotaxane Induced by Electrochemical Oxidation of Ferrocene-Containing Axis Molecule in the Presence of Crown Ether. J Am Chem Soc 2004; 126:3684-5. [PMID: 15038700 DOI: 10.1021/ja039899l] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electrochemical oxidation of aminomethylferrocenes in the presence of dibenzo[24]crown-8 affords pseudorotaxanes containing a ferrocenyl group in its axis moiety. The formation of the pseudorotaxanes results from formation of secondary ammonium ions by rapid electron transfer from the N atom to the initially formed Fe(III) state, followed by hydrogen atom transfer from TEMPOH to the N+*.
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Affiliation(s)
- Masaki Horie
- Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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12
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Downard AJ, Goodwin NJ, Henderson W. Electrochemistry of ferrocenylphosphines FcCH2PR2 (Fc=(η5-C5H5)Fe(η5-C5H4); R=Ph, CH2OH and CH2CH2CN), and some phosphine oxide, phosphine sulfide, phosphonium and metal complex derivatives. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00309-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Winter RF, Hornung FM. Trapping of a Ruthenium−Butatrienylidene Intermediate by Tertiary Amines. 2-Ammoniobutenynyl Complexes. Organometallics 1999. [DOI: 10.1021/om9903240] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rainer F. Winter
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - F. M. Hornung
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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N-Substituted 2-aza-[3]-ferrocenophanes. New synthesis using RuCl2(PPh3)3 catalyzed condensation, structure, and electrochemical behavior. J Organomet Chem 1999. [DOI: 10.1016/s0022-328x(99)00114-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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