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Bonnin Q, Wong S, Balan C, Comte V, Malacea R, Penouilh M, Richard P, Kehr G, Normand AT, Erker G, Le Gendre P. A Route toward (Aminomethyl)cyclopentadienide Ligands and Their Group 4 Metal Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800636] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Quentin Bonnin
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Sook‐Yen Wong
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Cédric Balan
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Virginie Comte
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Raluca Malacea
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Marie‐José Penouilh
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Philippe Richard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Gerald Kehr
- Organisch‐Chemisches Institut Westfälische Wilhelms‐Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Adrien T. Normand
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
| | - Gerhard Erker
- Organisch‐Chemisches Institut Westfälische Wilhelms‐Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Pierre Le Gendre
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR‐CNRS 6302) Université de Bourgogne Franche‐Comté 9, av. Alain Savary 21078 Dijon Cedex France
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Holz J, Ayerbe García M, Frey W, Krupp F, Peters R. Diastereoselective synthesis, structure and reactivity studies of ferrocenyloxazoline gold(i) and gold(ii) complexes. Dalton Trans 2018; 47:3880-3905. [PMID: 29451574 DOI: 10.1039/c8dt00109j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In the last few decades, gold complexes have demonstrated huge potential for soft Lewis acid catalysis. Despite the intensive research on Au complexes and planar chiral metallacycles, enantiopure ferrocenylgold complexes have - surprisingly - not been reported until the studies presented in this article. Herein, we report the asymmetric synthesis of planar chiral ferrocenyl Au(i) complexes. These dinuclear species form helically chiral ten-membered (NCCCAu)2 rings stabilized by aurophilic interactions. In supramolecular solid state structures, linear, zigzag or helical Au(i) wires with regular AuAu separations were observed. The dissolved dinuclear entities could be oxidized by Au(i) to unique ferrocenyl Au(ii) complexes featuring short Au(ii)-Au(ii) bonds, while the ferrocene core remained intact. However, our initial studies revealed the issue of configurational lability of the ferrocenyl Au(ii) complexes in terms of the element of planar chirality in the presence of the gold source, (Me2S)AuCl. This was successfully addressed by a systematic study implementing permanent σ-donor ortho-protecting groups such as methyl and trimethylsilyl, which impede an epimerization event. Oxidation of the dinuclear Au(i) complexes was also accomplished by oxidative addition reactions with halogenated solvents, preferably CHCl3. Additional reactivity studies revealed that dinuclear Au(ii) dihalide complexes are also formed with reactive alkylhalides such as iodomethane, benzylbromide and benzyliodide. Interestingly, the whole spectral range of colors (violet, blue, green, yellow, and red) is covered by the title complexes depending on the Au oxidation state and the anionic ligands in the Au(ii) complexes. This appears to be quite unusual for ferrocenes, which typically adopt orange to red colors in a non-oxidized state.
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Affiliation(s)
- Julia Holz
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569 Stuttgart, Germany.
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Preethalayam P, Krishnan KS, Thulasi S, Chand SS, Joseph J, Nair V, Jaroschik F, Radhakrishnan KV. Recent Advances in the Chemistry of Pentafulvenes. Chem Rev 2017; 117:3930-3989. [DOI: 10.1021/acs.chemrev.6b00210] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Preethanuj Preethalayam
- Organic
Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - K. Syam Krishnan
- Organic
Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Sreeja Thulasi
- Organic
Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - S. Sarath Chand
- Organic
Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Jomy Joseph
- Institut de Chimie Moléculaire de Reims CNRS (UMR 7312) and Université de Reims Champagne-Ardenne, Reims 51687 Cedex 2, France
| | - Vijay Nair
- Organic
Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Florian Jaroschik
- Institut de Chimie Moléculaire de Reims CNRS (UMR 7312) and Université de Reims Champagne-Ardenne, Reims 51687 Cedex 2, France
| | - K. V. Radhakrishnan
- Organic
Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
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Bulfield D, Maschke M, Lieb M, Metzler-Nolte N. Synthesis, chemical reactivity and electrochemical behaviour of mono- and difluoro metallocenes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.07.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Cini M, Bradshaw TD, Woodward S, Lewis W. Asymmetric Pentafulvene Carbometalation--Access to Enantiopure Titanocene Dichlorides of Biological Relevance. Angew Chem Int Ed Engl 2015; 54:14179-82. [PMID: 26457574 DOI: 10.1002/anie.201508034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Indexed: 11/06/2022]
Abstract
Unprecedented asymmetric copper-catalyzed addition of ZnEt2 (ZnBu2) to the exocyclic C=C bond of pentafulvenes C5H4(=CHAr) (Ar=2-MeOPh and related species) results in enantiomerically enriched (up to 93:7 e.r.) cyclopentadienyl ligands (C5H4CHEtAr; abbreviated Cp(R)). Copper catalyst promotion with both chiral phosphoramidite ligands and a phosphate additive is vital in realizing both acceptable enantioselectivities and reaction rates. Enantiomeric Cp(R)2TiCl2 complexes have been prepared; the (S,S) isomer is twice as active towards pancreatic, breast, and colon cancer cell lines as its (R,R) enantiomer at 24 h.
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Affiliation(s)
- Melchior Cini
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK). .,School of Pharmacy, Centre for Biomolecular Sciences, University of Nottingham, University Park, Nottingham NG7 2RD (UK).
| | - Tracey D Bradshaw
- School of Pharmacy, Centre for Biomolecular Sciences, University of Nottingham, University Park, Nottingham NG7 2RD (UK).
| | - Simon Woodward
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK).
| | - William Lewis
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
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Cini M, Bradshaw TD, Woodward S, Lewis W. Asymmetric Pentafulvene Carbometalation—Access to Enantiopure Titanocene Dichlorides of Biological Relevance. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Melchior Cini
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
- School of Pharmacy, Centre for Biomolecular Sciences, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
| | - Tracey D. Bradshaw
- School of Pharmacy, Centre for Biomolecular Sciences, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
| | - Simon Woodward
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
| | - William Lewis
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
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Ayerbe Garcia M, Frey W, Ringenberg MR, Schwilk M, Peters R. Dinuclear planar chiral ferrocenyl gold(i) & gold(ii) complexes. Chem Commun (Camb) 2015; 51:16806-9. [DOI: 10.1039/c5cc07018j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first scalemic ferrocenyl gold(i) and gold(ii) complexes have been prepared and structurally analysed by X-ray, (spectro)electrochemical and DFT studies.
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Affiliation(s)
| | - Wolfgang Frey
- Universität Stuttgart
- Institut für Organische Chemie
- 70569 Stuttgart
- Germany
| | - Mark R. Ringenberg
- Universität Stuttgart
- Institut für Anorganische Chemie
- 70569 Stuttgart
- Germany
| | - Max Schwilk
- Universität Stuttgart
- Institut für Theoretische Chemie
- 70569 Stuttgart
- Germany
| | - René Peters
- Universität Stuttgart
- Institut für Organische Chemie
- 70569 Stuttgart
- Germany
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Sünkel K, Weigand S, Hoffmann A, Blomeyer S, Reuter CG, Vishnevskiy YV, Mitzel NW. Synthesis and characterization of 1,2,3,4,5-pentafluoroferrocene. J Am Chem Soc 2014; 137:126-9. [PMID: 25531826 DOI: 10.1021/ja511588p] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Starting from ferrocene, pentafluoroferrocene [Fe(C5F5)(C5H5)] can be prepared in five steps via a one-pot lithiation-electrophilic fluorination strategy. Pentafluoroferrocene was characterized by multinuclear NMR and IR spectroscopy, by cyclovoltammetry as well as X-ray (solid) and electron diffraction (gas) and the experimental results compared with DFT calculations.
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Affiliation(s)
- Karlheinz Sünkel
- Department of Chemistry, Ludwig-Maximilians-University Munich , Butenandtstr. 9, 81377 München, Germany
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Martín A, Mena M, Pérez-Redondo A, Yélamos C. A new double-cube nitride complex containing titanium and potassium. Acta Crystallogr C 2011; 67:m157-9. [PMID: 21540534 DOI: 10.1107/s0108270111012686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 04/05/2011] [Indexed: 11/10/2022] Open
Abstract
The reaction of the imide-nitride complex [{Ti(η(5)-C(5)Me(5))(μ-NH)}(3)(μ(3)-N)] with potassium iodide in pyridine at room temperature affords the adduct di-μ-iodido-1:1'κ(4)I-bis{tri-μ(3)-imido-1:2:3κ(3)N;1:2:4κ(3)N;1:3:4κ(3)N-μ(3)-nitrido-2:3:4κ(3)N-tris[2,3,4(η(5))-pentamethylcyclopentadienyl](pyridine-1κN)-tetrahedro-potassiumtrititanium(IV)}, [K(2)Ti(6)(C(10)H(15))(6)I(2)N(2)(NH)(6)(C(5)H(5)N)(2)] or [(C(5)H(5)N)(μ-I)K{(μ(3)-NH)(3)Ti(3)(η(5)-C(5)Me(5))(3)(μ(3)-N)}](2). The crystal structure contains two [KTi(3)N(4)] cube-type units held together by two bridging I atoms. There is a centre of inversion located in the middle of this unprecedented discrete K(2)I(2) unit. The geometry around K is best described as distorted trigonal prismatic, with three imide groups, two bridging I atoms and one pyridine ligand.
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Affiliation(s)
- Avelino Martín
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, ES28871 Alcalá de Henares, Madrid, Spain
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Sünkel K, Weigand S. 2-Pyridylmetallocenes: Part I. Electrophilic halogenation of 2-pyridylferrocene. Molecular structures of 2-pyridylferrocene and its α-brominated and -fluorinated derivatives. Synthesis of 2-pyridylruthenocene and 2-pyridylcymantrene. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.01.062] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wang Y, Liu D, Meng Q, Zhang W. Asymmetric hydrogenation of simple ketones with planar chiral ruthenocenyl phosphinooxazoline ligands. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.10.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu D, Xie F, Zhao X, Zhang W. Enantioselective transfer hydrogenation of ketones with planar chiral ruthenocene-based phosphinooxazoline ligands. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.108] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Liu D, Xie F, Zhang W. Palladium-catalyzed asymmetric allylic alkylation with an enamine as the nucleophilic reagent. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.08.119] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Pampillón C, Claffey J, Hogan M, Tacke M. Morpholino-Functionalized and Heteroaryl-Substituted Titanocene Anti-Cancer Drugs: Synthesis and Cytotoxicity Studies. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700212] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Liu D, Xie F, Zhang W. The synthesis of novel C2-symmetric P,N-chelation ruthenocene ligands and their application in palladium-catalyzed asymmetric allylic substitution. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2006.11.121] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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