1
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Chowdhury D, Goswami S, Krishna GR, Mukherjee A. Transfer semi-hydrogenation of terminal alkynes with a well-defined iron complex. Dalton Trans 2024; 53:3484-3489. [PMID: 38312066 DOI: 10.1039/d3dt03248e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
The synthesis and characterization of a bis-iron(II) complex was accomplished upon treatment of a phosphine free NNN-pincer ligand (L) with FeCl2·4H2O under ambient conditions. The deep greenish colored iron(II) complex (Fe-1) was characterized by a single-crystal X-ray diffraction study along with IR spectroscopy, UV-Vis spectroscopy, mass spectrometry, and elemental analysis. The Fe-1 complex was tested for the transfer semi-hydrogenation of terminal alkynes to the corresponding alkenes through the dehydrogenation of dimethyl amine-borane. This procedure enables the conversion of various structurally different terminal alkynes to alkenes under mild conditions. Control experiments were performed to shed light on the possible intermediates generated during the present protocol.
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Affiliation(s)
- Deep Chowdhury
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh 492015, India.
| | - Souvik Goswami
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh 492015, India.
| | - Gamidi Rama Krishna
- Centre for X-ray Crystallography, CSIR-National Chemical Laboratory, Pune-411008, India
| | - Arup Mukherjee
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh 492015, India.
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2
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Bezawada SA, Ušto N, Wilke C, Barnes-Flaspoler M, Jagan R, Bauer EB. Ferrocenophanium Stability and Catalysis. Molecules 2023; 28:molecules28062729. [PMID: 36985702 PMCID: PMC10058812 DOI: 10.3390/molecules28062729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 03/30/2023] Open
Abstract
Ferrocenium catalysis is a vibrant research area, and an increasing number of ferrocenium-catalyzed processes have been reported in the recent years. However, the ferrocenium cation is not very stable in solution, which may potentially hamper catalytic applications. In an effort to stabilize ferrocenium-type architectures by inserting a bridge between the cyclopentadienyl rings, we investigated two ferrocenophanium (or ansa-ferrocenium) cations with respect to their stability and catalytic activity in propargylic substitution reactions. One of the ferrocenophanium complexes was characterized by single crystal X-ray diffraction. Cyclic voltammetry experiments of the ferrocenophane parent compounds were performed in the absence and presence of alcohol nucleophiles, and the stability of the cations in solution was judged based on the reversibility of the electron transfer. The experiments revealed a moderate stabilizing effect of the bridge, albeit the effect is not very pronounced or straightforward. Catalytic propargylic substitution test reactions revealed decreased activity of the ferrocenophanium cations compared to the ferrocenium cation. It appears that the somewhat stabilized ferrocenophanium cations show decreased catalytic activity.
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Affiliation(s)
- Sai Anvesh Bezawada
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, MO 63121, USA
| | - Neira Ušto
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, MO 63121, USA
| | - Chloe Wilke
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, MO 63121, USA
| | - Michael Barnes-Flaspoler
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, MO 63121, USA
| | - Rajamoni Jagan
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, MO 63121, USA
| | - Eike B Bauer
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, MO 63121, USA
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3
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Feng T, Sun B, Hao Q, Li J, Xu Y, Shang H, Wang D. Ambient synthesis of metal-covalent organic frameworks with Fe-iminopyridine linkages. Chem Commun (Camb) 2022; 58:8830-8833. [PMID: 35848845 DOI: 10.1039/d2cc03148e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly crystalline Fe-COFs were constructed from the building blocks carrying pyridyl-aldehyde and triamine moieties in the presence of Fe(OTf)2 and acetic acid under ambient conditions via a subcomponent assembly strategy. The spectral results prove the coordination of atomically distributed Fe(II) ions with the nitrogen species of covalently formed iminopyridine linkages.
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Affiliation(s)
- Tiantian Feng
- School of Science, China University of Geosciences (Beijing), Beijing 100083, P. R. China. .,Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences, Beijing 100190, P. R. China.
| | - Bing Sun
- School of Science, China University of Geosciences (Beijing), Beijing 100083, P. R. China.
| | - Qing Hao
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences, Beijing 100190, P. R. China.
| | - Jing Li
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P. R. China
| | - Ying Xu
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences, Beijing 100190, P. R. China.
| | - Hong Shang
- School of Science, China University of Geosciences (Beijing), Beijing 100083, P. R. China.
| | - Dong Wang
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences, Beijing 100190, P. R. China.
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4
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Kejriwal A. Non-heme iron coordination complexes for alkane oxidation using hydrogen peroxide (H 2O 2) as powerful oxidant. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2085567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ambica Kejriwal
- Department of Chemistry, Raiganj University, Raiganj, West Bengal, India
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5
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Pokhriyal D, Heins SP, Sifri RJ, Gentekos DT, Coleman RE, Wolczanski PT, Cundari TR, Fors BP, Lancaster KM, MacMillan SN. Reversible C-C Bond Formation, Halide Abstraction, and Electromers in Complexes of Iron Containing Redox-Noninnocent Pyridine-imine Ligands. Inorg Chem 2021; 60:18662-18673. [PMID: 34889590 DOI: 10.1021/acs.inorgchem.1c01815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The exploration of pyridine-imine (PI) iron complexes that exhibit redox noninnocence (RNI) led to several interesting discoveries. The reduction of (PI)FeX2 species afforded disproportionation products such as (dmpPI)2FeX (dmp = 2,6-Me2-C6H3, X = Cl, Br; 8-X) and (dippPI)2FeX (dipp = 2,6-iPr2-C6H3, X = Cl, Br; 9-X), which were independently prepared by reductions of (PI)FeX2 in the presence of PI. The crystal structure of 8-Br possessed an asymmetric unit with two distinct electromers, species with different electronic GSs: a low-spin (S = 1/2) configuration derived from an intermediate-spin S = 1 core antiferromagnetically (AF) coupled to an S = 1/2 PI ligand, and an S = 3/2 center resulting from a high-spin S = 2 core AF-coupled to an S = 1/2 PI ligand. Calculations were used to energetically compare plausible ground states. Polydentate diazepane-PI (DHPI) ligands were applied to the synthesis of monomeric dihalides (DHPI)FeX2 (X = Cl, 1-Cl2; X = Br, 1-Br2); reduction generated the highly distorted bioctahedral dimers (DHPA)2Fe2X2 ((3-X)2) containing a C-C bond formed from imine coupling; the monomers 1-X2 could be regenerated upon Ph3CX oxidation. Dihalides and their reduced counterparts were subjected to various alkyl halides and methyl methacrylate (MMA), generating polymers with little to no molecular weight control, indicative of simple radical-initiated polymerization.
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Affiliation(s)
- Devika Pokhriyal
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Spencer P Heins
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Renee J Sifri
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Dillon T Gentekos
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Rachael E Coleman
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Peter T Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Thomas R Cundari
- Department of Chemistry, CASCaM, University of North Texas, Denton, Texas 76201, United States
| | - Brett P Fors
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Kyle M Lancaster
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Samantha N MacMillan
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
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6
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Synthesis and structural elucidation of (pyridyl)imine Fe(II) complexes and their applications as catalysts in transfer hydrogenation of ketones. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Ticconi B, Capocasa G, Cerrato A, Di Stefano S, Lapi A, Marincioni B, Olivo G, Lanzalunga O. Insight into the chemoselective aromatic vs. side-chain hydroxylation of alkylaromatics with H 2O 2 catalyzed by a non-heme imine-based iron complex. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01868f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Side-chain/ring oxygenated product ratio increases upon decreasing the benzylic bond dissociation energy in the oxidation of alkylaromatics with H2O2 catalyzed by an imine-based iron complex.
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Affiliation(s)
- Barbara Ticconi
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
| | - Giorgio Capocasa
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
| | - Andrea Cerrato
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
| | - Stefano Di Stefano
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
| | - Andrea Lapi
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
| | - Beatrice Marincioni
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
| | - Giorgio Olivo
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química
- Universitat de Girona
- 17003 Girona
- Spain
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza” and
- Istituto CNR per i Sistemi Biologici (ISB-CNR)
- Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
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8
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Frateloreto F, Capocasa G, Olivo G, Abdel Hady K, Sappino C, Di Berto Mancini M, Levi Mortera S, Lanzalunga O, Di Stefano S. Increasing the steric hindrance around the catalytic core of a self-assembled imine-based non-heme iron catalyst for C-H oxidation. RSC Adv 2020; 11:537-542. [PMID: 35423066 PMCID: PMC8690968 DOI: 10.1039/d0ra09677f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 12/15/2020] [Indexed: 11/21/2022] Open
Abstract
Sterically hindered imine-based non-heme complexes 4 and 5 rapidly self-assemble in acetonitrile at 25 °C, when the corresponding building blocks are added in solution in the proper ratios. Such complexes are investigated as catalysts for the H2O2 oxidation of a series of substrates in order to ascertain the role and the importance of the ligand steric hindrance on the action of the catalytic core 1, previously shown to be an efficient catalyst for aliphatic and aromatic C-H bond oxidation. The study reveals a modest dependence of the output of the oxidation reactions on the presence of bulky substituents in the backbone of the catalyst, both in terms of activity and selectivity. This result supports a previously hypothesized catalytic mechanism, which is based on the hemi-lability of the metal complex. In the active form of the catalyst, one of the pyridine arms temporarily leaves the iron centre, freeing up a lot of room for the access of the substrate.
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Affiliation(s)
- Federico Frateloreto
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Giorgio Capocasa
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Giorgio Olivo
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Karim Abdel Hady
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Carla Sappino
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Marika Di Berto Mancini
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Stefano Levi Mortera
- Area of Genetics and Rare Diseases, Unit of Human Microbiome, Bambino Gesù Children's Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica and Istituto CNR per i Sistemi Biologici (ISB-CNR), Sezione Meccanismi di Reazione, Università di Roma La Sapienza P. le A. Moro 5 00185 Rome Italy
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9
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Ros D, Gianferrara T, Crotti C, Farnetti E. Iron-Catalyzed Oxidation of 1-Phenylethanol and Glycerol With Hydrogen Peroxide in Water Medium: Effect of the Nitrogen Ligand on Catalytic Activity and Selectivity. Front Chem 2020; 8:810. [PMID: 33195031 PMCID: PMC7581906 DOI: 10.3389/fchem.2020.00810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/31/2020] [Indexed: 11/18/2022] Open
Abstract
The iron(II) complexes [Fe(bpy)3](OTf)2 (bpy = 2,2'-bipyridine; OTf = CF3SO3) (1) and [Fe(bpydeg)3](OTf)2 (bpydeg = N4,N4-bis(2-(2-methoxyethoxy)ethyl) [2,2'-bipyridine]-4,4'-dicarboxamide) (2), the latter being a newly synthesized ligand, were employed as catalyst precursors for the oxidation of 1-phenylethanol with hydrogen peroxide in water, using either microwave or conventional heating. With the same oxidant and medium the oxidation of glycerol was also explored in the presence of 1 and 2, as well as of two similar iron(II) complexes bearing tridentate ligands, i.e., [Fe(terpy)2](OTf)2 (terpy = 2, 6-di(2-pyridyl)pyridine) (3) and [Fe(bpa)2](OTf)2 (bpa = bis(2-pyridinylmethyl)amine) (4): in most reactions the major product formed was formic acid, although with careful tuning of the experimental conditions significant amounts of dihydroxyacetone were obtained. Addition of heterocyclic amino acids (e.g., picolinic acid) increased the reaction yields of most catalytic reactions. The effect of such additives on the evolution of the catalyst precursors was studied by spectroscopic (NMR, UV-visible) and ESI-MS techniques.
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Affiliation(s)
- Dimitri Ros
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
| | - Teresa Gianferrara
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
| | - Corrado Crotti
- Unità Operativa di Supporto di Trieste, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy
| | - Erica Farnetti
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
- *Correspondence: Erica Farnetti
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10
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Talukder MM, Cue JMO, Miller JT, Gamage PL, Aslam A, McCandless GT, Biewer MC, Stefan MC. Ligand Steric Effects of α-Diimine Nickel(II) and Palladium(II) Complexes in the Suzuki-Miyaura Cross-Coupling Reaction. ACS OMEGA 2020; 5:24018-24032. [PMID: 32984724 PMCID: PMC7513363 DOI: 10.1021/acsomega.0c03415] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/21/2020] [Indexed: 05/13/2023]
Abstract
Nickel catalysts represent a low cost and environmentally friendly alternative to palladium-based catalytic systems for Suzuki-Miyaura cross-coupling (SMC) reactions. However, nickel catalysts have suffered from poor air, moisture, and thermal stabilities, especially at high catalyst loading, requiring controlled reaction conditions. In this report, we examine a family of mono- and dinuclear Ni(II) and Pd(II) complexes with a diverse and versatile α-diimine ligand environment for SMC reactions. To evaluate the ligand steric effects, including the bite angle in the reaction outcomes, the structural variation of the complexes was achieved by incorporating iminopyridine- and acenaphthene-based ligands. Moreover, the impact of substrate bulkiness was investigated by reacting various aryl bromides with phenylboronic acid, 2-naphthylboronic acid, and 9-phenanthracenylboronic acid. Yields were the best with the dinuclear complex, being nearly quantitative (93-99%), followed by the mononuclear complexes, giving yields of 78-98%. Consequently, α-diimine-based ligands have the potential to deliver Ni-based systems as sustainable catalysts in SMC.
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Affiliation(s)
- Md Muktadir Talukder
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - John Michael O. Cue
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - Justin T. Miller
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - Prabhath L. Gamage
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - Amina Aslam
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - Gregory T. McCandless
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - Michael C. Biewer
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
| | - Mihaela C. Stefan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson 75080, Texas, United States
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11
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Lubov DP, Talsi EP, Bryliakov KP. Methods for selective benzylic C–H oxofunctionalization of organic compounds. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4918] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Farnetti E, Crotti C, Zangrando E. Iron complexes with polydentate phosphines as unusual catalysts for alcohol oxidation. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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13
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Jana S, Thomas J, Sen Gupta S. Catalytic oxidation of alcohols using Fe-bTAML and NaClO: Comparing the reactivity of Fe(V)O and Fe(IV)O intermediates. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.067] [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]
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14
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Imidazole and Azo-Based Schiff Bases Ligands as Highly Active Antifungal and Antioxidant Components. HETEROATOM CHEMISTRY 2019. [DOI: 10.1155/2019/6862170] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We describe, herein, the synthesis, full characterization, and optical properties of four different ligandsL1-L4which associate an azo group, an imidazole unit, and a Schiff base fragment. The UV-visible absorption bands are characteristic ofπ→π⁎andn→π⁎transitions with an additional charge transfer between the azobenzene moiety and the imino group. Finally the determination of MIC80values against pathogenic fungi such asS. apiospermum,A. fumigatus,andC. albicansrevealed that these ligands have effective antifungal properties with highest activities (MIC80) onC. albicansfor the azole based ligandsL1-L3. DPPH radical scavenging of the studied ligands was also tested.
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15
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Gichumbi JM, Friedrich HB, Omondi B. Synthesis and characterization of water-soluble arene-ruthenium complexes and their application in biphasic olefin oxidation. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1548702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Joel M. Gichumbi
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | - Holger B. Friedrich
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | - Bernard Omondi
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
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16
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Microwave-assisted green oxidation of alcohols with hydrogen peroxide catalyzed by iron complexes with nitrogen ligands. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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17
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Ayadi A, Benmensour MA, Cheret Y, Boucekkine A, El-Ghayoury A. Zinc and copper complexes of stilbene iminopyridine ligands with η2-Olefin binding mode. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Leipzig BK, Rees JA, Kowalska JK, Theisen RM, Kavčič M, Poon PCY, Kaminsky W, DeBeer S, Bill E, Kovacs JA. How Do Ring Size and π-Donating Thiolate Ligands Affect Redox-Active, α-Imino-N-heterocycle Ligand Activation? Inorg Chem 2018; 57:1935-1949. [PMID: 29411979 PMCID: PMC8312276 DOI: 10.1021/acs.inorgchem.7b02748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Considerable effort has been devoted to the development of first-row transition-metal catalysts containing redox-active imino-pyridine ligands that are capable of storing multiple reducing equivalents. This property allows abundant and inexpensive first-row transition metals, which favor sequential one-electron redox processes, to function as competent catalysts in the concerted two-electron reduction of substrates. Herein we report the syntheses and characterization of a series of iron complexes that contain both π-donating thiolate and π-accepting (α-imino)-N-heterocycle redox-active ligands, with progressively larger N-heterocycle rings (imidazole, pyridine, and quinoline). A cooperative interaction between these complementary redox-active ligands is shown to dictate the properties of these complexes. Unusually intense charge-transfer (CT) bands, and intraligand metrical parameters, reminiscent of a reduced (α-imino)-N-heterocycle ligand (L•-), initially suggested that the electron-donating thiolate had reduced the N-heterocycle. Sulfur K-edge X-ray absorption spectroscopic (XAS) data, however, provides evidence for direct communication, via backbonding, between the thiolate sulfur and the formally orthogonal (α-imino)-N-heterocycle ligand π*-orbitals. DFT calculations provide evidence for extensive delocalization of bonds over the sulfur, iron, and (α-imino)-N-heterocycle, and TD-DFT shows that the intense optical CT bands involve transitions between a mixed Fe/S donor, and (α-imino)-N-heterocycle π*-acceptor orbital. The energies and intensities of the optical and S K-edge pre-edge XAS transitions are shown to correlate with N-heterocycle ring size, as do the redox potentials. When the thiolate is replaced with a thioether, or when the low-spin S = 0 Fe(II) is replaced with a high-spin S = 3/2 Co(II), the N-heterocycle ligand metrical parameters and electronic structure do not change relative to the neutral L0 ligand. With respect to the development of future catalysts containing redox-active ligands, the energy cost of storing reducing equivalents is shown to be lowest when a quinoline, as opposed to imidazole or pyridine, is incorporated into the ligand backbone of the corresponding Fe complex.
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Affiliation(s)
- Benjamin K. Leipzig
- The Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Julian A. Rees
- The Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Joanna K. Kowalska
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34–36, D–45470 Mülheim an der Ruhr, Germany
| | - Roslyn M. Theisen
- The Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | | | | | - Werner Kaminsky
- The Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34–36, D–45470 Mülheim an der Ruhr, Germany
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34–36, D–45470 Mülheim an der Ruhr, Germany
| | - Julie A. Kovacs
- The Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
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19
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Heo J, Lee H, Nayab S. Polymerizations of methyl methacrylate and rac-lactide by zinc(II) precatalyst containing N-substituted 2-iminomethylpyridine and 2-iminomethylquinoline. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1416106] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Joung Heo
- Department of Chemistry and Green-Nano Materials Research Centre, Kyungpook National University, Daegu, Republic of Korea
| | - Hyosun Lee
- Department of Chemistry and Green-Nano Materials Research Centre, Kyungpook National University, Daegu, Republic of Korea
| | - Saira Nayab
- Department of Chemistry, Shaheed Benazir Bhutto University, Sheringal Dir (U), Islamic Republic of Pakistan
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20
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Talsi EP, Samsonenko DG, Ottenbacher RV, Bryliakov KP. Highly Enantioselective C−H Oxidation of Arylalkanes with H2
O2
in the Presence of Chiral Mn-Aminopyridine Complexes. ChemCatChem 2017. [DOI: 10.1002/cctc.201701169] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Evgenii P. Talsi
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russian Federation
| | - Denis G. Samsonenko
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Nikolaev Institute of Inorganic Chemistry; Pr. Lavrentieva 3 Novosibirsk 630090 Russian Federation
| | - Roman V. Ottenbacher
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russian Federation
| | - Konstantin P. Bryliakov
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russian Federation
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21
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Ayadi A, Branzea DG, Allain M, Canevet D, Dinçalp H, El-Ghayoury A. Coordination entities of a pyrene-based iminopyridine ligand: Structural and photophysical properties. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Affiliation(s)
- Eike B. Bauer
- University of Missouri - St. Louis; Department of Chemistry and Biochemistry; One University Boulevard St. Louis, MO 63121 USA
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23
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Biewer C, Hamacher C, Kaiser A, Vogt N, Sandleben A, Chin MT, Yu S, Vicic DA, Klein A. Unsymmetrical N-Aryl-1-(pyridin-2-yl)methanimine Ligands in Organonickel(II) Complexes: More Than a Blend of 2,2'-Bipyridine and N,N-Diaryl-α-diimines? Inorg Chem 2016; 55:12716-12727. [PMID: 27989202 DOI: 10.1021/acs.inorgchem.6b01874] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The new organonickel complexes [(R-PyMA)Ni(Mes)X] [R-PyMA = N-aryl-1-(pyridin-2-yl)methanimine; aryl = phenyl, 2,6-Me2-, 3,5-Me2-, 2,4,6-Me3-, 2,6-iPr2-, 3,5-(OMe)2-, 2-NO2-4-Me-, 4-NO2-, 2-CF3-, and 2-CF3-6-F-phenyl; Mes = 2,4,6-trimethylphenyl; X = F, Cl, Br, or I] were obtained as approximate 1/1 cis and trans isomeric mixtures or pure cis isomers depending on the PyMA ligand and X. The [(R-PyMA)Ni(Mes)X] complexes with X = Br or Cl were directly synthesized from the precursors trans-[(PPh3)2Ni(Mes)X], while [(PyMA)Ni(Mes)X] derivatives with X = F or I were obtained from [(PyMA)Ni(Mes)Br] through X exchange reactions. Although density functional theory (DFT) calculations show a preference for the sterically favored cis isomers, both isomers could be observed in many cases; in three cases, even single crystals for X-ray diffraction could be obtained for the trans isomers. Possible intermediates for the isomerization were investigated by DFT calculations. All complexes were studied by multiple spectroscopic means, electrochemistry, and spectroelectrochemistry (for the reduction processes). The long-wavelength metal-to-ligand charge-transfer (MLCT) absorptions vary markedly with the R substituent of the ligand and the cathodic electrochemical potentials to a far smaller degree. Both are almost invariable upon variation of X. All of this is in line with Ni-based and π*-based lowest unoccupied molecular orbitals (LUMOs). In line with the unsymmetric character of the NPy^Nmethanimine ligand, electrochemistry and MLCT transitions seem to not correspond to the same type of π* LUMO, making these PyMA ligands more interesting than the symmetric heteroaromatic polypyridine ligands such as 2,2'-bipyridine (bpy; NPy^NPy) and N,N-diaryl-substituted aliphatic α-diimines (Nmethanimine^Nmethanimine) such as the diaza-1,3-butadienes (DAB). First attempts to use these complexes in Negishi-type cross-coupling reactions were successful.
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Affiliation(s)
- Christian Biewer
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Claudia Hamacher
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Andre Kaiser
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Nicolas Vogt
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Aaron Sandleben
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Mason T Chin
- Department of Chemistry, Lehigh University , 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - Siqi Yu
- Department of Chemistry, Lehigh University , 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - David A Vicic
- Department of Chemistry, Lehigh University , 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - Axel Klein
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
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24
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Iron complexes with nitrogen bidentate ligands as green catalysts for alcohol oxidation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.05.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Martínez-Ferraté O, López-Valbuena JM, Belmonte MM, White AJP, Benet-Buchholz J, Britovsek GJP, Claver C, van Leeuwen PWNM. Novel iminopyridine derivatives: ligands for preparation of Fe(ii) and Cu(ii) dinuclear complexes. Dalton Trans 2016; 45:3564-76. [PMID: 26804332 DOI: 10.1039/c5dt04358a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of imino- and amino-pyridine ligands based on dihydrobenzofurobenzofuran (BFBF) and methanodibenzodioxocine (DBDOC) backbones have been synthesized. These ligands form exclusively dinuclear complexes with metals such as iron(II) and copper(II). The structures for complexes 15, 16, 18, 19, 20, 21, 23, and 24 were determined by X-ray crystallography. The complexes show large distances for the metal nuclei and different geometries depending on the nature of the metal. An octahedral geometry was observed for the iron(II) complexes, while copper(II) complex 24 showed a distorted trigonal bipyramidal geometry. The iron(II) complexes showed activity as catalysts in the cycloaddition of CO2 to epoxides, obtaining moderate yields of cyclic carbonates.
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Affiliation(s)
- Oriol Martínez-Ferraté
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain. and Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain.
| | - Josep M López-Valbuena
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
| | - Marta Martínez Belmonte
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, UK.
| | - Jordi Benet-Buchholz
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
| | - George J P Britovsek
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, UK.
| | - Carmen Claver
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain. and Centre Tecnòlogic de la Química, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain.
| | - Piet W N M van Leeuwen
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
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26
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Olivo G, Lanzalunga O, Di Stefano S. Non-Heme Imine-Based Iron Complexes as Catalysts for Oxidative Processes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501024] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Olivo G, Giosia S, Barbieri A, Lanzalunga O, Di Stefano S. Alcohol oxidation with H2O2 catalyzed by a cheap and promptly available imine based iron complex. Org Biomol Chem 2016; 14:10630-10635. [DOI: 10.1039/c6ob01984f] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A cheap and easily available catalyst for alcohol oxidation with unexpected selectivity features.
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Affiliation(s)
- Giorgio Olivo
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Rome
- Italy
- Istituto CNR di Metodologie Chimiche (IMC-CNR)
| | - Simone Giosia
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Rome
- Italy
- Istituto CNR di Metodologie Chimiche (IMC-CNR)
| | - Alessia Barbieri
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Rome
- Italy
- Istituto CNR di Metodologie Chimiche (IMC-CNR)
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Rome
- Italy
- Istituto CNR di Metodologie Chimiche (IMC-CNR)
| | - Stefano Di Stefano
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Rome
- Italy
- Istituto CNR di Metodologie Chimiche (IMC-CNR)
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28
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Olivo G, Nardi M, Vìdal D, Barbieri A, Lapi A, Gómez L, Lanzalunga O, Costas M, Di Stefano S. C-H Bond Oxidation Catalyzed by an Imine-Based Iron Complex: A Mechanistic Insight. Inorg Chem 2015; 54:10141-52. [PMID: 26457760 DOI: 10.1021/acs.inorgchem.5b01500] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A family of imine-based nonheme iron(II) complexes (LX)2Fe(OTf)2 has been prepared, characterized, and employed as C-H oxidation catalysts. Ligands LX (X = 1, 2, 3, and 4) stand for tridentate imine ligands resulting from spontaneous condensation of 2-pycolyl-amine and 4-substituted-2-picolyl aldehydes. Fast and quantitative formation of the complex occurs just upon mixing aldehyde, amine, and Fe(OTf)2 in a 2:2:1 ratio in acetonitrile solution. The solid-state structures of (L1)2Fe(OTf)(ClO4) and (L3)2Fe(OTf)2 are reported, showing a low-spin octahedral iron center, with the ligands arranged in a meridional fashion. (1)H NMR analyses indicate that the solid-state structure and spin state is retained in solution. These analyses also show the presence of an amine-imine tautomeric equilibrium. (LX)2Fe(OTf)2 efficiently catalyze the oxidation of alkyl C-H bonds employing H2O2 as a terminal oxidant. Manipulation of the electronic properties of the imine ligand has only a minor impact on efficiency and selectivity of the oxidative process. A mechanistic study is presented, providing evidence that C-H oxidations are metal-based. Reactions occur with stereoretention at the hydroxylated carbon and selectively at tertiary over secondary C-H bonds. Isotopic labeling analyses show that H2O2 is the dominant origin of the oxygen atoms inserted in the oxygenated product. Experimental evidence is provided that reactions involve initial oxidation of the complexes to the ferric state, and it is proposed that a ligand arm dissociates to enable hydrogen peroxide binding and activation. Selectivity patterns and isotopic labeling studies strongly suggest that activation of hydrogen peroxide occurs by heterolytic O-O cleavage, without the assistance of a cis-binding water or alkyl carboxylic acid. The sum of these observations provides sound evidence that controlled activation of H2O2 at (LX)2Fe(OTf)2 differs from that occurring in biomimetic iron catalysts described to date.
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Affiliation(s)
- Giorgio Olivo
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185 Rome, Italy.,Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus de Montilivi, 17071 Girona, Spain
| | - Martina Nardi
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185 Rome, Italy
| | - Diego Vìdal
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus de Montilivi, 17071 Girona, Spain
| | - Alessia Barbieri
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185 Rome, Italy
| | - Andrea Lapi
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185 Rome, Italy.,Consortium of Chemical Catalysis and Reactivity, CIRCC Interuniversity , Via Celso Ulpiani 27, 70126 Bari, Italy
| | - Laura Gómez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus de Montilivi, 17071 Girona, Spain.,Serveis Tècnics de Recerca (STR), Universitat de Girona , Parc Cientı́fic i Tecnològic, E-17003 Girona, Spain
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185 Rome, Italy.,Consortium of Chemical Catalysis and Reactivity, CIRCC Interuniversity , Via Celso Ulpiani 27, 70126 Bari, Italy
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus de Montilivi, 17071 Girona, Spain
| | - Stefano Di Stefano
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, I-00185 Rome, Italy.,Consortium of Chemical Catalysis and Reactivity, CIRCC Interuniversity , Via Celso Ulpiani 27, 70126 Bari, Italy
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29
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Ayadi A, Branzea DG, Benmensour MA, Boucekkine A, Zouari N, El-Ghayoury A. Azo-based iminopyridine ligands: synthesis, optical properties, theoretical calculations and complexation studies. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Fan S, Luan Y, Wang J, Gao H, Zhang X, Wang G. Monodispersed poly(4-vinylpyridine) spheres supported Fe(III) material: An efficient and reusable catalyst for benzylic oxidation. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.04.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Lindley BM, Wolczanski PT, Cundari TR, Lobkovsky EB. First-Row Transition Metal and Lithium Pyridine-ene-amide Complexes Exhibiting N- and C-Isomers and Ligand-Based Activation of Benzylic C–H Bonds. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00385] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brian M. Lindley
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Thomas R. Cundari
- Department of Chemistry, Center for Advanced
Scientific Computing and Modeling (CASCaM), University of North Texas, Box 305070, Denton, Texas 76203-5070, United States
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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32
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33
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Lindhorst AC, Haslinger S, Kühn FE. Molecular iron complexes as catalysts for selective C–H bond oxygenation reactions. Chem Commun (Camb) 2015; 51:17193-212. [DOI: 10.1039/c5cc07146a] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This feature article summarises recent developments in homogeneous C–H bond oxygenation catalysed by molecular iron complexes.
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Affiliation(s)
- A. C. Lindhorst
- Chair of Inorganic Chemistry/Molecular Catalysis
- Technische Universität München (TUM)
- Department of Chemistry/Catalysis Research Center
- D-85747 Garching bei München
- Germany
| | - S. Haslinger
- Chair of Inorganic Chemistry/Molecular Catalysis
- Technische Universität München (TUM)
- Department of Chemistry/Catalysis Research Center
- D-85747 Garching bei München
- Germany
| | - Fritz E. Kühn
- Chair of Inorganic Chemistry/Molecular Catalysis
- Technische Universität München (TUM)
- Department of Chemistry/Catalysis Research Center
- D-85747 Garching bei München
- Germany
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34
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Sahu D, Silva AR, Das P. A novel iron(iii)-based heterogeneous catalyst for aqueous oxidation of alcohols using molecular oxygen. RSC Adv 2015. [DOI: 10.1039/c5ra16734e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The first example of an iron(iii)-based heterogeneous catalyst for alcohol oxidation reactions in water employing molecular oxygen has been reported. Interestingly, the immobilized catalyst shows superior activity over its homogeneous counterpart.
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Affiliation(s)
- Debojeet Sahu
- Department of Chemistry
- Dibrugarh University
- Dibrugarh
- India
| | - Ana Rosa Silva
- CICECO-Aveiro Institute of Materials
- University of Aveiro
- Aveiro
- Portugal
| | - Pankaj Das
- Department of Chemistry
- Dibrugarh University
- Dibrugarh
- India
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35
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Shen D, Miao C, Xu D, Xia C, Sun W. Highly Efficient Oxidation of Secondary Alcohols to Ketones Catalyzed by Manganese Complexes of N4 Ligands with H2O2. Org Lett 2014; 17:54-7. [DOI: 10.1021/ol5032156] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Duyi Shen
- State Key
Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute
of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chengxia Miao
- State Key
Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute
of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Daqian Xu
- State Key
Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute
of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Chungu Xia
- State Key
Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute
of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Wei Sun
- State Key
Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute
of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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36
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Aerobic oxidation of secondary alcohols using NHPI and iron salt as catalysts at room temperature. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.06.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Fe(NO3)3-Catalyzed Monoterpene Oxidation by Hydrogen Peroxide: An Inexpensive and Environmentally Benign Oxidative Process. Catal Letters 2014. [DOI: 10.1007/s10562-013-1189-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Olivo G, Arancio G, Mandolini L, Lanzalunga O, Di Stefano S. Hydrocarbon oxidation catalyzed by a cheap nonheme imine-based iron(ii) complex. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00626g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An imine-based iron complex, prepared in situ from iron(ii), pyridine-2-carbaldehyde and 2-aminomethylpyridine, effectively catalyzes hydrocarbon oxidation at low loadings.
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Affiliation(s)
- Giorgio Olivo
- Dipartimento di Chimica
- Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR)
- Sezione Meccanismi di Reazione
- c/o Dipartimento di Chimica
- Sapienza Università di Roma
| | - Giorgio Arancio
- Dipartimento di Chimica
- Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR)
- Sezione Meccanismi di Reazione
- c/o Dipartimento di Chimica
- Sapienza Università di Roma
| | - Luigi Mandolini
- Dipartimento di Chimica
- Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR)
- Sezione Meccanismi di Reazione
- c/o Dipartimento di Chimica
- Sapienza Università di Roma
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica
- Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR)
- Sezione Meccanismi di Reazione
- c/o Dipartimento di Chimica
- Sapienza Università di Roma
| | - Stefano Di Stefano
- Dipartimento di Chimica
- Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR)
- Sezione Meccanismi di Reazione
- c/o Dipartimento di Chimica
- Sapienza Università di Roma
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39
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Highly efficient oxidation of diphenylmethane to benzophenone employing a novel ruthenium catalyst with tert-butylhydroperoxide under mild conditions. CATAL COMMUN 2013. [DOI: 10.1016/j.catcom.2013.03.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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40
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Lenze M, Sedinkin SL, Bauer EB. Polydentate pyridyl ligands and the catalytic activity of their iron(II) complexes in oxidation reactions utilizing peroxides as the oxidants. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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41
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Lenze M, Bauer EB. Chemoselective, iron(II)-catalyzed oxidation of a variety of secondary alcohols over primary alcohols utilizing H2O2 as the oxidant. Chem Commun (Camb) 2013; 49:5889-91. [PMID: 23712395 DOI: 10.1039/c3cc41131a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild, iron-based catalyst system is presented that selectively oxidizes secondary alcohols to the corresponding hydroxy ketones in the presence of primary alcohols within 15 minutes at room temperature, utilizing H2O2 as the oxidant.
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Affiliation(s)
- Matthew Lenze
- University of Missouri-St. Louis, One University Boulevard, St. Louis, MO, USA
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42
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Non-heme iron catalysis in C C, C–H, and CH2 oxidation reactions. Oxidative transformations on terpenoids catalyzed by Fe(bpmen)(OTf)2. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.02.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Volpe EC, Wolczanski PT, Darmon JM, Lobkovsky EB. Syntheses and characterizations of α-iminopyridine compounds (alkylNCHpy)2Fe(L/Xn), and an assessment of redox non-innocence. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.08.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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44
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Iron(II) α-Aminopyridine Complexes and Their Catalytic Activity in Oxidation Reactions: A Comparative Study of Activity and Ligand Decomposition. Chempluschem 2012. [DOI: 10.1002/cplu.201200244] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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45
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Hosseini-Monfared H, Näther C, Winkler H, Janiak C. Highly selective and “green” alcohol oxidations in water using aqueous 10% H2O2 and iron-benzenetricarboxylate metal–organic gel. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.05.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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46
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Talsi EP, Bryliakov KP. Chemo- and stereoselective CH oxidations and epoxidations/cis-dihydroxylations with H2O2, catalyzed by non-heme iron and manganese complexes. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.04.005] [Citation(s) in RCA: 314] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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