1
|
Espada MF, Esqueda AC, Campos J, Rubio M, López-Serrano J, Álvarez E, Maya C, Carmona E. Cationic (η5-C5Me4R)RhIII Complexes with Metalated Aryl Phosphines Featuring η4-Phosphorus plus Pseudo-Allylic Coordination. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00688] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ana C. Esqueda
- Escuela
de Nivel Medio Superior de León, Universidad de Guanajuato, Hermanos Aldama y Blvd. Torres Landa s/n, León, Guanajuato, México CP 37480
| | | | | | | | | | | | | |
Collapse
|
2
|
Hsu LS, Lo YH. Synthesis and reactivity of di- and tri-metallic complexes containing the TpRu(PPh3) fragment. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
3
|
Rao ARB, Babu GN, Pal S. A Half-Sandwich Rhodium(III) Complex with 4-Bromo-N-(1-Pyrenylidene)Aniline: Regioselective Cyclorhodation of the 1-Pyrenyl Group. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14416979694082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Reaction of [RhCp*Cl2]2 (Cp* = pentamethylcyclopentadienyl anion), 4-bromo-N-(1-pyrenylidene)aniline (Hpyan, H represents a proton of the 1-pyrenyl ring) and CH3CO2Na in 1:2:6 mole ratio in dichloromethane provides the half-sandwich, cyclometallated rhodium(III) complex [RhCp*(pyan)Cl]. X-ray crystallographic study confirms the bidentate 1-pyrenyl ortho-C and azomethine-N coordination mode of (pyan)−and the half-sandwich ‘piano-stool’ structure of [RhCp*(pyan)Cl]. In dichloromethane, the diamagnetic, redox active complex displays a metal-centred oxidation at E1/2 = 1.14 V (versus Ag/AgCl).
Collapse
Affiliation(s)
| | - G. Narendra Babu
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Samudranil Pal
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| |
Collapse
|
4
|
Zamorano A, Rendón N, Valpuesta JEV, Álvarez E, Carmona E. Synthesis and Reactivity toward H2 of (η(5)-C5Me5)Rh(III) Complexes with Bulky Aminopyridinate Ligands. Inorg Chem 2015; 54:6573-81. [PMID: 26067207 DOI: 10.1021/acs.inorgchem.5b00905] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrophilic, cationic Rh(III) complexes of composition [(η(5)-C5Me5)Rh(Ap)](+), (1(+)), were prepared by reaction of [(η(5)-C5Me5)RhCl2]2 and LiAp (Ap = aminopyridinate ligand) followed by chloride abstraction with NaBArF (BArF = B[3,5-(CF3)2C6H3]4). Reactions of cations 1(+) with different Lewis bases (e.g., NH3, 4-dimethylaminopyridine, or CNXyl) led in general to monoadducts 1·L(+) (L = Lewis base; Xyl = 2,6-Me2C6H3), but carbon monoxide provided carbonyl-carbamoyl complexes 1·(CO)2(+) as a result of metal coordination and formal insertion of CO into the Rh-Namido bond of complexes 1(+). Arguably, the most relevant observation reported in this study stemmed from the reactions of complexes 1(+) with H2. (1)H NMR analyses of the reactions demonstrated a H2-catalyzed isomerization of the aminopyridinate ligand in cations 1(+) from the ordinary κ(2)-N,N' coordination to a very uncommon, formally tridentate κ-N,η(3) pseudoallyl bonding mode (complexes 3(+)) following benzylic C-H activation within the xylyl substituent of the pyridinic ring of the aminopyridinate ligand. The isomerization entailed in addition H-H and N-H bond activation and mimicked previous findings with the analogous iridium complexes. However, in dissimilarity with iridium, rhodium complexes 1(+) reacted stoichiometrically at 20 °C with excess H2. The transformations resulted in the hydrogenation of the C5Me5 and Ap ligands with concurrent reduction to Rh(I) and yielded complexes [(η(4)-C5Me5H)Rh(η(6)-ApH)](+), (2(+)), in which the pyridinic xylyl substituent is η(6)-bonded to the rhodium(I) center. New compounds reported were characterized by microanalysis and NMR spectroscopy. Representative complexes were additionally investigated by X-ray crystallography.
Collapse
Affiliation(s)
- Ana Zamorano
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC), and Universidad de Sevilla Av. Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain
| | - Nuria Rendón
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC), and Universidad de Sevilla Av. Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain
| | - José E V Valpuesta
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC), and Universidad de Sevilla Av. Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC), and Universidad de Sevilla Av. Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC), and Universidad de Sevilla Av. Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain
| |
Collapse
|
5
|
Kumaran E, Leong WK. [Cp*RhCl2]2-Catalyzed Alkyne Hydroamination to 1,2-Dihydroquinolines. Organometallics 2015. [DOI: 10.1021/om501253v] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Elumalai Kumaran
- Division of Chemistry and
Biological Chemistry, Nanyang Technological University, 21 Nanyang
Link, Singapore 637371
| | - Weng Kee Leong
- Division of Chemistry and
Biological Chemistry, Nanyang Technological University, 21 Nanyang
Link, Singapore 637371
| |
Collapse
|
6
|
Talwar D, Li HY, Durham E, Xiao J. A Simple Iridicycle Catalyst for Efficient Transfer Hydrogenation of N-Heterocycles in Water. Chemistry 2015; 21:5370-9. [DOI: 10.1002/chem.201500016] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Indexed: 11/06/2022]
|
7
|
Albertin G, Antoniutti S, Bortoluzzi M, Botter A, Castro J. Reactivity of vinylidene complexes of ruthenium with hydrazines and hydroxylamines. Dalton Trans 2015; 44:3439-46. [DOI: 10.1039/c4dt03464c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Reaction of vinylidene complexes of Ru with hydrazines and hydroxylamines affords nitrile derivatives and amine or water. A reaction path based on 15N NMR studies and DFT calculations is proposed.
Collapse
Affiliation(s)
- Gabriele Albertin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari Venezia
- 30123 Venezia
- Italy
| | - Stefano Antoniutti
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari Venezia
- 30123 Venezia
- Italy
| | - Marco Bortoluzzi
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari Venezia
- 30123 Venezia
- Italy
| | - Alessandra Botter
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari Venezia
- 30123 Venezia
- Italy
| | - Jesús Castro
- Departamento de Química Inorgánica
- Universidade de Vigo
- Facultade de Química
- Edificio de Ciencias Experimentais
- 36310 Vigo
| |
Collapse
|
8
|
Talwar D, Poyatos Salguero N, Robertson CM, Xiao J. Primary amines by transfer hydrogenative reductive amination of ketones by using cyclometalated Ir(III) catalysts. Chemistry 2014; 20:245-52. [PMID: 24516890 DOI: 10.1002/chem.201303541] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Cyclometalated iridium complexes are found to be versatile catalysts for the direct reductive amination (DRA) of carbonyls to give primary amines under transfer-hydrogenation conditions with ammonium formate as both the nitrogen and hydrogen source. These complexes are easy to synthesise and their ligands can be easily tuned. The activity and chemoselectivity of the catalyst towards primary amines is excellent, with a substrate to catalyst ratio (S/C) of 1000 being feasible. Both aromatic and aliphatic primary amines were obtained in high yields. Moreover, a first example of homogeneously catalysed transfer-hydrogenative DRA has been realised for β-keto ethers, leading to the corresponding β-amino ethers. In addition, non-natural α-amino acids could also be obtained in excellent yields with this method.
Collapse
|
9
|
Talwar D, Wu X, Saidi O, Salguero NP, Xiao J. Versatile iridicycle catalysts for highly efficient and chemoselective transfer hydrogenation of carbonyl compounds in water. Chemistry 2014; 20:12835-42. [PMID: 25124283 DOI: 10.1002/chem.201403701] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Indexed: 12/11/2022]
Abstract
Cyclometalated iridium complexes are shown to be highly efficient and chemoselective catalysts for the transfer hydrogenation of a wide range of carbonyl groups with formic acid in water. Examples include α-substituted ketones (α-ether, α-halo, α-hydroxy, α-amino, α-nitrile or α-ester), α-keto esters, β-keto esters and α,β-unsaturated aldehydes. The reduction was carried out at substrate/catalyst ratios of up to 50 000 at pH 4.5 and required no organic solvent. The protocol provides a practical, easy and efficient way for the synthesis of β-functionalised secondary alcohols, such as β-hydroxyethers, β-hydroxyamines and β-hydroxyhalo compounds, which are valuable intermediates in pharmaceutical, fine chemical, perfume and agrochemical synthesis.
Collapse
Affiliation(s)
- Dinesh Talwar
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD (UK) http://pcwww.liv.ac.uk/∼jxiao
| | | | | | | | | |
Collapse
|
10
|
Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2012. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.02.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
11
|
Villa-Marcos B, Tang W, Wu X, Xiao J. A highly active cyclometallated iridium catalyst for the hydrogenation of imines. Org Biomol Chem 2014; 11:6934-9. [PMID: 23903630 DOI: 10.1039/c3ob41150h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A cyclometallated iridium complex containing an imino ligand has been shown to catalyse the hydrogenation of imines. The catalyst is highly active and selective for imino bonds, with a wide variety of imines being hydrogenated in less than 1 hour at a substrate/catalyst (S/C) ratio of 2000 at 20 bar H2 pressure and 75 °C.
Collapse
|
12
|
Han YF, Jin GX. Cyclometalated [Cp*M(C^X)] (M = Ir, Rh; X = N, C, O, P) complexes. Chem Soc Rev 2014; 43:2799-823. [DOI: 10.1039/c3cs60343a] [Citation(s) in RCA: 215] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Isolated and well-defined cyclometalated iridium/rhodium complexes that contain a Cp*M–C (M = Ir, Rh) bond stabilised by the intramolecular coordination of neutral donor atoms (N, C, O or P), together with their applications, were summarized.
Collapse
Affiliation(s)
- Ying-Feng Han
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material
- Department of Chemistry
- Fudan University
- Shanghai, P. R. China
| | - Guo-Xin Jin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material
- Department of Chemistry
- Fudan University
- Shanghai, P. R. China
| |
Collapse
|
13
|
Kumaran E, How KTS, Ganguly R, Li Y, Leong WK. Synthesis and Reactivity of Cationic Iridium Aminocarbenes Derived from Terminal Alkynes and 2-Aminopyridines. Organometallics 2013. [DOI: 10.1021/om400326c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Elumalai Kumaran
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Kai Tong Sonia How
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Rakesh Ganguly
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yongxin Li
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Weng Kee Leong
- Division of Chemistry
and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| |
Collapse
|
14
|
Iali W, La Paglia F, Le Goff XF, Sredojević D, Pfeffer M, Djukic JP. Room temperature tandem hydroamination and hydrosilation/protodesilation catalysis by a tricarbonylchromium-bound iridacycle. Chem Commun (Camb) 2013; 48:10310-2. [PMID: 22982813 DOI: 10.1039/c2cc35520e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chromiumtricarbonyl-bound iridacycle displays novel catalytic virtues for the conversion of terminal aromatic alkynes into racemic N-phenyl, 1-arylethylamines by tandem hydro-amination and hydrosilation/protodesilation reactions under mild "one pot" conditions.
Collapse
Affiliation(s)
- Wissam Iali
- Institut de Chimie de Strasbourg, UMR 7177, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | | | | | | | | | | |
Collapse
|
15
|
Anderson CM, Weinstein MA, Morris J, Kfoury N, Duman L, Balema TA, Kreider-Mueller A, Scheetz P, Ferrara S, Chierchia M, Tanski JM. Biscyclometalated platinum complexes with thiophene ligands. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.10.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|