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Lee M, Oh KR, Cha GY, Jeong SM, Lee SK, Hwang YK. Immobilization of Silver(I) Ions on Amino-Functionalized Chromium(III) Terephthalate with Organophosphine and its C-H Carboxylation of a Heteroaromatic Compound. Chempluschem 2024; 89:e202400096. [PMID: 38523300 DOI: 10.1002/cplu.202400096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/12/2024] [Accepted: 03/18/2024] [Indexed: 03/26/2024]
Abstract
A newly designed heterogenized catalyst that incorporates silver(I) ions with 2-(dicyclohexylphosphaneyl)acetaldehyde (PCy2 aldehyde) into amino-functionalized chromium(III) terephthalate is developed. Silver(I) ions were robustly immobilized on the amino-functionalized chromium(III) terephthalate, which contains an imine bond formed by the reaction with PCy2 aldehyde. The Ag(I) ion is coordinated with the phosphine in the imine group to create MIL-101-AP(Ag). Characterizations were carefully carried out according to the synthetic steps. The catalytic performance of MIL-101-AP(Ag) was evaluated through the C-H carboxylation of thiophene-2-carbonitrile, achieving a 10 % yield with a turnover number of 1.0. The recyclability of the MIL-101-AP(Ag) catalyst was successfully demonstrated with five cycle, with no loss in activity and selectivity observed. This approach, which involves the formation of an imine bond to facilitate silver loading with phosphine on amino-functionalized MIL-101(Cr), exhibits significant potential for both CO2 fixation and C-H carboxylation, thereby highlighting the modified material's promise as a sustainable catalyst.
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Affiliation(s)
- Mijung Lee
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Kyung-Ryul Oh
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Ga-Young Cha
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Se-Min Jeong
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Su-Kyung Lee
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
- Department of Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Young Kyu Hwang
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
- Department of Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
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2
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Ajayi T, Lough AJ, Morris RH. Mechanochemical Synthesis of Chromium(III) Complexes Containing Bidentate PN and Tridentate P-NH-P and P-NH-P' Ligands. ACS OMEGA 2024; 9:19690-19699. [PMID: 38708235 PMCID: PMC11064035 DOI: 10.1021/acsomega.4c02076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 05/07/2024]
Abstract
Chromium(III) complexes bearing bidentate {NH2(CH2)2PPh2: PN, (S,S)-[NH2(CHPh)2PPh2]: P'N} and tridentate [Ph2P(CH2)2N(H)(CH2)2PPh2: P-NH-P, (S,S)-(iPr)2PCH2CH2N(H)CH(Ph)CH(Ph)PPh2: P-NH-P'] ligands have been synthesized using a mechanochemical approach. The complexes {cis-[Cr(PN)Cl2]Cl (1), cis-[Cr(P'N)Cl2]Cl (2), mer-Cr(P-NH-P)Cl3 (3), and mer-Cr(P-NH-P')Cl3 (4)} were obtained in high yield (95-97%) via the grinding of the respective ligands andthe solid Cr(III) ion precursor [CrCl3(THF)3] with the aid of a pestle and mortar, followed by recrystallization in acetonitrile. The isolated complexes are high spin. A single-crystal X-ray diffraction study of 2 revealed a cationic chromium complex with two P'N ligands in a cis configuration with P' trans to P' with chloride as the counteranion. The X-ray study of 4 shows a neutral Cr(III) complex with the P-NH-P' ligand in a mer configuration. The difference in molecular structures and bulkiness of the ligands influence the electronic, magnetic, and electrochemical properties of the complexes as exhibited by the bathochromic shifts in the electronic absorption peaks of the complexes and the relative increase in the magnetic moment of 3 (4.19 μβ) and 4 (4.15 μβ) above the spin only value (3.88 μβ) for a d3 electronic configuration. Complexes 1-4 were found to be inactive in the hydrogenation of an aldimine [(E)-1-(4-fluorophenyl)-N-phenylmethanimine] under a variety of activating conditions. The addition of magnesium and trimethylsilyl chloride in THF did cause hydrogenation at room temperature, but this occurred even in the absence of the chromium complex. The hydrogen in the amine product came from the THF solvent in this novel reaction, as determined by deuterium incorporation into the product when deuterated THF was used.
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Affiliation(s)
- Tomilola
J. Ajayi
- Department of Chemistry, University
of Toronto, 80 Saint George Street, Toronto M5S3H6, Ontario, Canada
| | - Alan J. Lough
- Department of Chemistry, University
of Toronto, 80 Saint George Street, Toronto M5S3H6, Ontario, Canada
| | - Robert H. Morris
- Department of Chemistry, University
of Toronto, 80 Saint George Street, Toronto M5S3H6, Ontario, Canada
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3
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Wang H, Wen J, Zhang X. Chiral Tridentate Ligands in Transition Metal-Catalyzed Asymmetric Hydrogenation. Chem Rev 2021; 121:7530-7567. [PMID: 34014646 DOI: 10.1021/acs.chemrev.1c00075] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Asymmetric hydrogenation (AH) of double bonds has been one of the most effective methods for the preparation of chiral molecules and for the synthesis of important chiral building blocks. In the past 60 years, noble metals with bidentate ligands have shown marvelous reactivity and enantioselectivity in asymmetric hydrogenation of a series of prochiral substrates. In recent years, developing chiral tridentate ligands has played an increasingly important role in AH. With modular frameworks and a variety of functionalities on the side arms, chiral tridentate ligand complexes enable both reactivities and stereoselectivities. Although great achievements have been made for noble metal catalysts with chiral tridentate ligands since the 1990s, the design of chiral tridentate ligands for earth abundant metal catalysts has still been in high demand. This review summarizes the development of chiral tridentate ligands for homogeneous asymmetric hydrogenation. The philosophy of ligand design and the reaction mechanisms are highlighted and discussed as well.
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Affiliation(s)
- Heng Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Jialin Wen
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.,Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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4
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Gradiski MV, Kharat AN, Ong MSE, Lough AJ, Smith SAM, Morris RH. A One-Step Preparation of Tetradentate Ligands with Nitrogen and Phosphorus Donors by Reductive Amination and Representative Iron Complexes. Inorg Chem 2020; 59:11041-11053. [PMID: 32687329 DOI: 10.1021/acs.inorgchem.0c01535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The synthesis and use of the first examples of unsymmetrical, mixed phosphine donor tripodal NPP2' ligands N(CH2CH2PR2)2(CH2CH2PPh2) are presented. The ligands are synthesized via a convenient, one pot reductive amination using 2-(diphenylphosphino)ethylamine and various substituted phosphonium dimers in order to introduce mixed phosphine donors substituted with P/P', those being Ph/Cy (2), Ph/iPr (3), Ph/iBu (4), Ph/o-Tol (5), and Ph/p-Tol (6). Additionally, we have developed the first known synthesis of a symmetrical tripodal NP3 ligand N(CH2CH2PiBu2)3 using bench safe ammonium acetate as the lone nitrogen source (7). This new protocol eliminates the use of extremely dangerous nitrogen mustard reagents typically required to synthesize NP3 ligands. Some of these tetradentate ligands and also P2NN' ligands N(CH2-o-C5H4N)(CH2CH2PR2)2 (P2NN'-Cy, R = Cy; P2NN'-Ph, R = Ph) prepared by reductive amination using 2-picolylamine are used in the synthesis and reactions of iron complexes. FeCl2(P2NN'-Cy) (8) undergoes single halide abstraction with NaBPh4 to give the trigonal bipyramidal complex [FeCl(P2NN'-Cy)][BPh4] (9). Upon exposure to CO(g), complex 9 readily coordinates CO giving [FeCl(P2NN'-Cy)(CO)][BPh4] (10), and further treatment with an excess of NaBH4 results in formation of the hydride complex [Fe(H)(P2NN'-Cy)(CO)][BPh4] (11). Our previously reported complex FeCl2(P2NN'-Ph) undergoes double halide abstraction with NaBPh4 in the presence of the coordinating solvent to give [Fe(NCMe)2(P2NN'-Ph)][BPh4]2 (12). Ligand 3 can be coordinated to FeCl2, and upon sequential halide abstraction, treatment with NaBH4, and exposure to an atmosphere of dinitrogen, the dinitrogen hydride complex [Fe(H)(NPP2'-iPr)(N2)][BPh4] (13) is isolated. Our symmetrical NP3 ligand 7 can also be coordinated to FeCl2 and, upon exposure to an atmosphere of CO(g), selectively forms [FeCl(NP3)(CO)][BPh4] (14) after salt metathesis with NaBPh4. Complex 14 can be treated with an excess of NaBH4 to give the hydride complex [Fe(H)(NP3)(CO)][BPh4] (15), which can further be deprotonated/reduced to the Fe(0) complex Fe(NP3)(CO) (16) upon treatment with an excess of KH.
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Affiliation(s)
- Matthew V Gradiski
- Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario, Canada, M5S 3H6
| | - Ali Nemati Kharat
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Maegan S E Ong
- Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario, Canada, M5S 3H6
| | - Alan J Lough
- Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario, Canada, M5S 3H6
| | - Samantha A M Smith
- Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario, Canada, M5S 3H6
| | - Robert H Morris
- Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario, Canada, M5S 3H6
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5
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Gradiski MV, Tsui BTH, Lough AJ, Morris RH. PNN′ & P2NN′ ligands via reductive amination with phosphine aldehydes: synthesis and base-metal coordination chemistry. Dalton Trans 2019; 48:2150-2159. [DOI: 10.1039/c8dt04058c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Phosphorus-donor “arms” are readily added to amines in order to enable sturdy base metal coordination.
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Affiliation(s)
| | | | - Alan J. Lough
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
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6
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Zell T, Langer R. From Ruthenium to Iron and Manganese-A Mechanistic View on Challenges and Design Principles of Base-Metal Hydrogenation Catalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201701722] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Thomas Zell
- ADAMA Makhteshim Ltd.; PO Box 60, Industrial Zone Beer Sheva 8410001 Israel
| | - Robert Langer
- Department of Chemistry; Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35032 Marburg Germany
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7
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Kizas O, Moiseev S, Chaschin I, Godovikov I, Dolgushin F, Nikolaev A, Nikitin L, Khokhlov A. Phosphonium salts derived from α-ferrocenylvinyl cation in situ generated in sc -CO 2 from ethynylferrocene by Nafion film. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Smith SAM, Lagaditis PO, Lüpke A, Lough AJ, Morris RH. Unsymmetrical Iron P-NH-P′ Catalysts for the Asymmetric Pressure Hydrogenation of Aryl Ketones. Chemistry 2017; 23:7212-7216. [DOI: 10.1002/chem.201701254] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Samantha A. M. Smith
- Department of Chemistry; University of Toronto; 80 Saint George St. Toronto Ontario M5S3H6 Canada
| | - Paraskevi O. Lagaditis
- Department of Chemistry; University of Toronto; 80 Saint George St. Toronto Ontario M5S3H6 Canada
| | - Anne Lüpke
- Department of Chemistry; Johannes Gutenberg University, Mainz; Saarstraße 21 55122 Mainz Germany
| | - Alan J. Lough
- Department of Chemistry; University of Toronto; 80 Saint George St. Toronto Ontario M5S3H6 Canada
| | - Robert H. Morris
- Department of Chemistry; University of Toronto; 80 Saint George St. Toronto Ontario M5S3H6 Canada
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9
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Chu WY, Richers CP, Kahle ER, Rauchfuss TB, Arrigoni F, Zampella G. Imine-Centered Reactions in Imino-Phosphine Complexes of Iron Carbonyls. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00318] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wan-Yi Chu
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Casseday P. Richers
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Elizabeth R. Kahle
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Federica Arrigoni
- Department of Biotechnology
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Giuseppe Zampella
- Department of Biotechnology
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
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Magnuson KW, Oshiro SM, Gurr JR, Yoshida WY, Gembicky M, Rheingold AL, Hughes RP, Cain MF. Streamlined Preparation and Coordination Chemistry of Hybrid Phosphine–Phosphaalkene Ligands. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00101] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kevin W. Magnuson
- Department
of Chemistry, University of Hawai‘i at Ma̅noa, 2545
McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Shelly M. Oshiro
- Department
of Chemistry, University of Hawai‘i at Ma̅noa, 2545
McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Joshua R. Gurr
- Department
of Chemistry, University of Hawai‘i at Ma̅noa, 2545
McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Wesley Y. Yoshida
- Department
of Chemistry, University of Hawai‘i at Ma̅noa, 2545
McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Milan Gembicky
- Department
of Chemistry, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093, United States
| | - Arnold L. Rheingold
- Department
of Chemistry, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093, United States
| | - Russell P. Hughes
- 6128
Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Matthew F. Cain
- Department
of Chemistry, University of Hawai‘i at Ma̅noa, 2545
McCarthy Mall, Honolulu, Hawaii 96822, United States
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11
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Das UK, Daifuku SL, Gorelsky SI, Korobkov I, Neidig ML, Le Roy JJ, Murugesu M, Baker RT. Mononuclear, Dinuclear, and Trinuclear Iron Complexes Featuring a New Monoanionic SNS Thiolate Ligand. Inorg Chem 2016; 55:987-97. [PMID: 26741465 DOI: 10.1021/acs.inorgchem.5b02833] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The new tridentate ligand, S(Me)N(H)S = 2-(2-methylthiophenyl)benzothiazolidine, prepared in a single step from commercial precursors in excellent yield, undergoes ring-opening on treatment with Fe(OTf)2 in the presence of base affording a trinuclear iron complex, [Fe3(μ2-S(Me)NS(-))4](OTf)2 (1) which is fully characterized by structural and spectroscopic methods. X-ray structural data reveal that 1 contains four S(Me)NS(-) ligands meridionally bound to two pseudooctahedral iron centers each bridged by two thiolates to a distorted tetrahedral central iron. The combined spectroscopic (UV-vis, Mössbauer, NMR), magnetic (solution and solid state), and computational (DFT) studies indicate that 1 includes a central, high-spin Fe(II) (S = 2) with two low-spin (S = 0) peripheral Fe(II) centers. Complex 1 reacts with excess PMePh2, CNxylyl (2,6-dimethylphenyl isocyanide), and P(OMe)3 in CH3CN to form diamagnetic, thiolate-bridged, dinuclear Fe(II) complexes {[Fe(μ-S(Me)NS(-))L2]2}(OTf)2 (2-4). These complexes are characterized by elemental analysis; (1)H NMR, IR, UV-vis, and Mössbauer spectroscopy; and single crystal X-ray diffraction. Interestingly, addition of excess P(OMe)3 to complex 1 in CH2Cl2 produces primarily the diamagnetic, mononuclear Fe(II) complex, {Fe(S(Me)NS(-))[P(OMe)3]3}(OTf) (5).
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Affiliation(s)
- Uttam K Das
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Stephanie L Daifuku
- Department of Chemistry, University of Rochester , Rochester, New York 14627, United States
| | - Serge I Gorelsky
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Ilia Korobkov
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Michael L Neidig
- Department of Chemistry, University of Rochester , Rochester, New York 14627, United States
| | - Jennifer J Le Roy
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - R Tom Baker
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
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12
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Huber R, Bigler R, Mezzetti A. Chiral Iron(II) NPPN Complexes: Synthesis and Application in the Asymmetric Strecker Reaction of Azomethine Imines. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00357] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raffael Huber
- Department
of Chemistry and
Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Raphael Bigler
- Department
of Chemistry and
Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Antonio Mezzetti
- Department
of Chemistry and
Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
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13
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Morris RH. Exploiting metal-ligand bifunctional reactions in the design of iron asymmetric hydrogenation catalysts. Acc Chem Res 2015; 48:1494-502. [PMID: 25897779 DOI: 10.1021/acs.accounts.5b00045] [Citation(s) in RCA: 339] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This is an Account of our development of iron-based catalysts for the asymmetric transfer hydrogenation (ATH) and asymmetric pressure hydrogenation (AH) of ketones and imines. These chemical processes provide enantiopure alcohols and amines for use in the pharmaceutical, agrochemical, fragrance, and other fine chemical industries. Fundamental principles of bifunctional reactivity obtained by studies of ruthenium catalysts by Noyori's group and our own with tetradentate ligands with tertiary phosphine and secondary amine donor groups were applied to improve the performance of these first iron(II) catalysts. In particular the correct positioning of a bifunctional H-Fe-NH unit in an iron hydride amine complex leads to exceptional catalyst activity because of the low energy barrier of dihydrogen transfer to the polar bond of the substrate. In addition the ligand structure with this NH group along with an asymmetric array of aryl groups orients the incoming substrate by hydrogen-bonding, and steric interactions provide the hydrogenated product in high enantioselectivity for several classes of substrates. Enantiomerically pure diamines or diphenylphosphino-amine compounds are used as the source of the asymmetry in the tetradentate ligands formed by the condensation of the amines with dialkyl- or diaryl-phosphinoaldehydes, a synthesis that is templated by Fe(II). The commercially available ortho-diphenylphosphinobenzaldehyde was used in the initial studies, but then diaryl-phosphinoacetaldehydes were found to produce much more effective ligands for iron(II). Once the mechanism of catalysis became clearer, the iron-templated synthesis of (S,S)-PAr2CH2CH2NHCHPhCHPhNH2 ligand precursors was developed to specifically introduce a secondary amine in the precatalyst structures. The reaction of a precatalyst with strong base yields a key iron-amido complex that reacts with isopropanol (in ATH) or dihydrogen (in AH) to generate an iron hydride with the Fe-H bond parallel to the secondary amine N-H. In the AH reactions, the correct acidity of the intermediate iron-dihydrogen complex and correct basicity of the amide are important factors for the heterolytic splitting of the dihydrogen to generate the H-Fe-N-H unit; the acidity of dihydrogen complexes including those found in hydrogenases can be estimated by a simple additive ligand acidity constant method. The placement of the hydridic-protonic Fe-H···HN interaction in the asymmetric catalyst structure influences the enantioinduction. The sense of enantioinduction is predictable from the structure of the H-Fe-N-H-containing catalyst interacting with the ketone in the same way as related H-Ru-N-H-containing catalysts. The modular construction of the catalysts permits large variations in order to produce alcohol or amine products with enantiomeric excess in the 90-100% range in several cases.
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Affiliation(s)
- Robert H. Morris
- Department of Chemistry, University of Toronto, 80 Saint
George Street, Toronto, Ontario M5S3H6, Canada
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14
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Zuo W, Morris RH. Synthesis and use of an asymmetric transfer hydrogenation catalyst based on iron(II) for the synthesis of enantioenriched alcohols and amines. Nat Protoc 2015; 10:241-57. [DOI: 10.1038/nprot.2015.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Sonnenberg JF, Lough AJ, Morris RH. Synthesis of Iron P-N-P′ and P-NH-P′ Asymmetric Hydrogenation Catalysts. Organometallics 2014. [DOI: 10.1021/om5008083] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jessica F. Sonnenberg
- Davenport Laboratories, Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Alan J. Lough
- Davenport Laboratories, Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Robert H. Morris
- Davenport Laboratories, Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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Koehne I, Schmeier TJ, Bielinski EA, Pan CJ, Lagaditis PO, Bernskoetter WH, Takase MK, Würtele C, Hazari N, Schneider S. Synthesis and Structure of Six-Coordinate Iron Borohydride Complexes Supported by PNP Ligands. Inorg Chem 2014; 53:2133-43. [DOI: 10.1021/ic402762v] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ingo Koehne
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Timothy J. Schmeier
- Department
of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Elizabeth A. Bielinski
- Department
of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Cassie J. Pan
- Department
of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Paraskevi O. Lagaditis
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Wesley H. Bernskoetter
- Department
of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Michael K. Takase
- Department
of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Christian Würtele
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Nilay Hazari
- Department
of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Sven Schneider
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
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Lagaditis PO, Sues PE, Sonnenberg JF, Wan KY, Lough AJ, Morris RH. Iron(II) Complexes Containing Unsymmetrical P–N–P′ Pincer Ligands for the Catalytic Asymmetric Hydrogenation of Ketones and Imines. J Am Chem Soc 2014; 136:1367-80. [DOI: 10.1021/ja4082233] [Citation(s) in RCA: 251] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Paraskevi O. Lagaditis
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Peter E. Sues
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Jessica F. Sonnenberg
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Kai Yang Wan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Alan J. Lough
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Robert H. Morris
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
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Sues PE, Demmans KZ, Morris RH. Rational development of iron catalysts for asymmetric transfer hydrogenation. Dalton Trans 2014; 43:7650-67. [DOI: 10.1039/c4dt00612g] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Jazzazi TM, Görls H, Gessner G, Heinemann SH, Westerhausen M. Photosensitive iron(II)-based CO-releasing molecules (CORMs) with vicinal amino and diphenylphosphino substituted chelating ligands. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.02.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Park K, Lagaditis PO, Lough AJ, Morris RH. Synthesis of new late transition metal P,P-, P,N-, and P,O- complexes using phosphonium dimers as convenient ligand precursors. Inorg Chem 2013; 52:5448-56. [PMID: 23570571 DOI: 10.1021/ic4003753] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The phosphonium dimer [-Cy2PCH(OH)CH2-]2(X)2, X = Cl(-), Br(-) was used to synthesize and characterize a variety of late transition metal complexes containing chelating phosphino-enolate (PCy2CH═CHO(-)), imine (PCy2CH2CH═NR, R = Ph, (S)-CHMePh), and oxime (PCy2CH2CH═NOH) ligands. The phosphonium dimer, when deprotected with base, generates the phosphine aldehyde PCy2CH2CHO in situ, which, in the presence of [M(COD)Cl]2, M = Rh, Ir, and a PF6(-) salt, or [Ni(H2O)6][BF4]2, facilitates a condensation reaction with an amine or hydroxylamine to form phosphino-imine or phosphino-oxime metal complexes [M(COD)(P-N)][PF6] or [Ni(P-N)2][X]2, X = ClO4(-), BF4(-), respectively. In the absence of an amine, phosphino-enolate containing complexes are formed. A neutral Ni(II) complex Ni(PCy2CH═CHO)2 with trans-bis(phosphino-enolate) ligands which resemble ligands used on nickel for olefin oligomerization, as well as neutral Rh(I) and Ir(I) 1,5-cyclooctadiene complexes M(COD)(PCy2CH═CHO) are characterized. Both the rhodium and iridium complexes are active olefin hydrogenation catalysts. Reaction of the phosphino-aldehyde with Pt(COD)Cl2 results in the formation of trans-PtCl2(PCy2CH2CHO)2 with pendant aldehyde groups, and under certain conditions, they undergo an intraligand aldol condensation to form a disphosphine ligand.
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Affiliation(s)
- Kanghee Park
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S3H6, Canada
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Mikhailine AA, Maishan MI, Morris RH. Asymmetric Transfer Hydrogenation of Ketimines Using Well-Defined Iron(II)-Based Precatalysts Containing a PNNP Ligand. Org Lett 2012; 14:4638-41. [DOI: 10.1021/ol302079q] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Alexandre A. Mikhailine
- Davenport Laboratory, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Mazharul I. Maishan
- Davenport Laboratory, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Robert H. Morris
- Davenport Laboratory, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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22
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Ardizzoia GA, Brenna S, Durini S, Therrien B. Ruthenium(II) Complexes Bearing a Ligand Derived from P,N- or P,N,O-Diphenylphosphinobenzoxazine: Synthesis, X-ray Characterization, and cis Diastereoselectivity in Styrene Cyclopropanation. Organometallics 2012. [DOI: 10.1021/om300434u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- G. Attilio Ardizzoia
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria,
Via Valleggio, 11, 22100 Como, Italy
| | - Stefano Brenna
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria,
Via Valleggio, 11, 22100 Como, Italy
| | - Sara Durini
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria,
Via Valleggio, 11, 22100 Como, Italy
| | - Bruno Therrien
- Institute of Chemistry, Université de Neuchâtel, Ave de Bellevaux 51, CH-2000 Neuchâtel,
Switzerland
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Tate CW, deMello A, Gee AD, Kealey S, Vilar R, White AJP, Long NJ. Hemilabile and reversible carbon monoxide binding properties of iron(ii), cobalt(ii) and nickel(ii) complexes containing a new tridentate P–S–N ligand. Dalton Trans 2012; 41:83-9. [DOI: 10.1039/c1dt11248a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xue Z, Daran JC, Champouret Y, Poli R. Ligand Adducts of Bis(acetylacetonato)iron(II): A 1H NMR Study. Inorg Chem 2011; 50:11543-51. [DOI: 10.1021/ic201486v] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhigang Xue
- LCC (Laboratoire de
Chimie de
Coordination), Université de Toulouse, UPS, INP, 205, route de Narbonne, F-31077 Toulouse, France
| | - Jean-Claude Daran
- LCC (Laboratoire de
Chimie de
Coordination), Université de Toulouse, UPS, INP, 205, route de Narbonne, F-31077 Toulouse, France
| | - Yohan Champouret
- LCC (Laboratoire de
Chimie de
Coordination), Université de Toulouse, UPS, INP, 205, route de Narbonne, F-31077 Toulouse, France
| | - Rinaldo Poli
- LCC (Laboratoire de
Chimie de
Coordination), Université de Toulouse, UPS, INP, 205, route de Narbonne, F-31077 Toulouse, France
- Institut Universitaire de France, 103, bd Saint-Michel, 75005 Paris, France
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Zhu T, Wambach TC, Fryzuk MD. New Cyclopentenyl-Linked [NPN] Ligands and Their Coordination Chemistry with Zirconium: Synthesis of a Dinuclear Side-On-Bound Dinitrogen Complex. Inorg Chem 2011; 50:11212-21. [DOI: 10.1021/ic201762r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ting Zhu
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Truman C. Wambach
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Michael D. Fryzuk
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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Beves JE, Blight BA, Campbell CJ, Leigh DA, McBurney RT. Strategien und Taktiken für die metallgesteuerte Synthese von Rotaxanen, Knoten, Catenanen und Verschlingungen höherer Ordnung. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007963] [Citation(s) in RCA: 157] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Beves JE, Blight BA, Campbell CJ, Leigh DA, McBurney RT. Strategies and tactics for the metal-directed synthesis of rotaxanes, knots, catenanes, and higher order links. Angew Chem Int Ed Engl 2011; 50:9260-327. [PMID: 21928462 DOI: 10.1002/anie.201007963] [Citation(s) in RCA: 575] [Impact Index Per Article: 44.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Indexed: 11/06/2022]
Abstract
More than a quarter of a century after the first metal template synthesis of a [2]catenane in Strasbourg, there now exists a plethora of strategies available for the construction of mechanically bonded and entwined molecular level structures. Catenanes, rotaxanes, knots and Borromean rings have all been successfully accessed by methods in which metal ions play a pivotal role. Originally metal ions were used solely for their coordination chemistry; acting either to gather and position the building blocks such that subsequent reactions generated the interlocked products or by being an integral part of the rings or "stoppers" of the interlocked assembly. Recently the role of the metal has evolved to encompass catalysis: the metal ions not only organize the building blocks in an entwined or threaded arrangement but also actively promote the reaction that covalently captures the interlocked structure. This Review outlines the diverse strategies that currently exist for forming mechanically bonded molecular structures with metal ions and details the tactics that the chemist can utilize for creating cross-over points, maximizing the yield of interlocked over non-interlocked products, and the reactions-of-choice for the covalent capture of threaded and entwined intermediates.
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Affiliation(s)
- Jonathon E Beves
- School of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, UK
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Sues PE, Lough AJ, Morris RH. Stereoelectronic Factors in Iron Catalysis: Synthesis and Characterization of Aryl-Substituted Iron(II) Carbonyl P–N–N–P Complexes and Their Use in the Asymmetric Transfer Hydrogenation of Ketones. Organometallics 2011. [DOI: 10.1021/om2005172] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter E. Sues
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Alan J. Lough
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Robert H. Morris
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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Dyer H, Picot A, Vendier L, Auffrant A, Le Floch P, Sabo-Etienne S. Tridentate and Tetradentate Iminophosphorane-Based Ruthenium Complexes in Catalytic Transfer Hydrogenation of Ketones. Organometallics 2011. [DOI: 10.1021/om101058m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hellen Dyer
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse, France
| | - Alexandre Picot
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse, France
| | - Laure Vendier
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse, France
| | - Audrey Auffrant
- Laboratoire Hétéroélements et Coordination, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
| | - Pascal Le Floch
- Laboratoire Hétéroélements et Coordination, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
| | - Sylviane Sabo-Etienne
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse, France
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Lindner R, van den Bosch B, Lutz M, Reek JNH, van der Vlugt JI. Tunable Hemilabile Ligands for Adaptive Transition Metal Complexes. Organometallics 2011. [DOI: 10.1021/om100804k] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ronald Lindner
- van ’t Hoff Institute for Molecular Sciences, Supramolecular and Homogeneous Catalysis Group, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Bart van den Bosch
- van ’t Hoff Institute for Molecular Sciences, Supramolecular and Homogeneous Catalysis Group, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Martin Lutz
- Department for Crystal and Structural Chemistry, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Joost N. H. Reek
- van ’t Hoff Institute for Molecular Sciences, Supramolecular and Homogeneous Catalysis Group, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jarl Ivar van der Vlugt
- van ’t Hoff Institute for Molecular Sciences, Supramolecular and Homogeneous Catalysis Group, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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Lagaditis PO, Lough AJ, Morris RH. Iron Complexes for the Catalytic Transfer Hydrogenation of Acetophenone: Steric and Electronic Effects Imposed by Alkyl Substituents at Phosphorus. Inorg Chem 2010; 49:10057-66. [DOI: 10.1021/ic101366z] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Alan J. Lough
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Robert H. Morris
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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Boddien A, Loges B, Gärtner F, Torborg C, Fumino K, Junge H, Ludwig R, Beller M. Iron-Catalyzed Hydrogen Production from Formic Acid. J Am Chem Soc 2010; 132:8924-34. [DOI: 10.1021/ja100925n] [Citation(s) in RCA: 300] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Albert Boddien
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Björn Loges
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Felix Gärtner
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Christian Torborg
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Koichi Fumino
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Henrik Junge
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Ralf Ludwig
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
| | - Matthias Beller
- Leibniz - Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, Rostock, 18059, Germany and Universität Rostock, Institut für Chemie, Abteilung Physikalische Chemie, Dr. Lorenz Weg 1, Rostock, 18059, Germany
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Chakraborty S, Guan H. First-row transition metal catalyzed reduction of carbonyl functionalities: a mechanistic perspective. Dalton Trans 2010; 39:7427-36. [DOI: 10.1039/c002942d] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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36
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Buchard A, Payet E, Auffrant A, Goff XL, Floch PL. Iminophosphorane-based [P2N2] rhodium complexes: synthesis, reactivity, and application in catalysed transfer hydrogenation of polar bonds. NEW J CHEM 2010. [DOI: 10.1039/c0nj00299b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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