1
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Rina YA, Schmidt JAR. Alpha-metalated N, N-dimethylbenzylamine rare-earth metal complexes and their catalytic applications. Dalton Trans 2024. [PMID: 38757291 DOI: 10.1039/d4dt00826j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
This perspective summarizes our group's extensive research in the realm of organometallic lanthanide complexes, while also placing the catalytic reactions supported by these species within the context of known lanthanide catalysis worldwide, with a specific focus on phosphorus-based catalytic reactions such as intermolecular hydrophosphination and hydrophosphinylation. α-Metalated N,N-dimethylbenzylamine ligands have been utilized to generate homoleptic lanthanide complexes, which have subsequently proven to be highly active lanthanum-based catalysts. The main goal of our research program has been to enhance the catalytic efficiency of lanthanum-based complexes, which began with initial successes in the stoichiometric synthesis of organometallic lanthanide complexes and utilization of these species in catalytic hydrophosphination reactions. Not only have these species supported traditional lanthanide catalysis, such as the hydrophosphination of heterocumulenes like carbodiimides, isocyanates, and isothiocyanates, but they have also been effective for a plethora of catalytic reactions tested thus far, including the hydrophosphinylation and hydrophosphorylation of nitriles, hydrophosphination and hydrophosphinylation of alkynes and alkenes, and the heterodehydrocoupling of silanes and amines. Each of these catalytic transformations is meritorious in its own right, offering new synthetic routes to generate organic scaffolds with enhanced functionality while concurrently minimizing both waste generation and energy consumption. Objectives: We aim for the research summary presented herein to inspire and encourage other researchers to investigate f-element based stoichiometric and catalytic reactions. Our efforts in this field began with the recognition that potassium salts of benzyldimethylamine preferred deprotonation at the α-position, rather than the ortho-position, and we wondered if this regiochemistry would be retained in the formation of lanthanide complexes. The pursuit of this simple idea led first to a series of structurally fascinating homoleptic organometallic lanthanide complexes with surprisingly good stability. Fundamental studies of the protonolysis chemistry of these complexes ultimately revealed highly versatile lanthanide-based precatalysts that have propelled a catalytic investigation spanning more than a decade. We anticipate that this summative perspective will animate the synthetic as well as biological communities to consider La(DMBA)3-based catalytic methods in the synthesis of functionalized organic scaffolds as an atom-economic, convenient, and efficient methodology. Ultimately, we envision our work making a positive impact on the advancement of novel chemical transformations and contributing to progress in various fields of science and technology.
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Affiliation(s)
- Yesmin Akter Rina
- Department of Chemistry & Biochemistry, School of Green Chemistry and Engineering, College of Natural Sciences and Mathematics, The University of Toledo, 2801 W. Bancroft St. MS 602, Toledo, Ohio 43606-3390, USA.
| | - Joseph A R Schmidt
- Department of Chemistry & Biochemistry, School of Green Chemistry and Engineering, College of Natural Sciences and Mathematics, The University of Toledo, 2801 W. Bancroft St. MS 602, Toledo, Ohio 43606-3390, USA.
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2
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Wani AA, Carballo JJG, Jayaprakash H, Wörle M, Widera A, Togni A, Grützmacher H. A Simple Manganese(I) Catalyst for the Efficient and Selective Hydrophosphination of Olefins with PH 3, Primary, and Secondary Phosphanes. Chemistry 2024; 30:e202303848. [PMID: 38312108 DOI: 10.1002/chem.202303848] [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: 01/22/2024] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 02/06/2024]
Abstract
A tridentate ligand L with a P,NH,N donor motif was synthesized in few steps from commercially available precursors. Upon reaction with [MnBr(CO)5], an octahedral 18-electron complex [Mn(CO)3(L)]Br (1) is obtained in which L adopts a facial arrangement. After deprotonation of the NH group in the cationic complex unit, a neutral Mn(I) amido complex [Mn(CO)2(L-H)] (2) is formed under loss of CO. Rearrangement of L-H leads to a trigonal bipyramidal structure in which the P and N donor centers are in trans position. Further deprotonation of 2 results in a dep-blue anionic complex fragment [Mn(CO)2(L-2H)]- (3). DFT calculations and a QTAIM analysis show that the amido complex 2 contains a Mn-N bond with partial double bond character and 3 an aromatic MnN2C2 ring. The anion [Mn(CO)2(L-2H)]- reacts with Ph2PH to give a phosphido complex, which serves as phosphide transfer reagent to activated olefins. But the catalytic activity is low. However, the neutral amido complex 2 is an excellent catalyst and with loadings as low as 0.04 mol %, turn over frequencies of >40'000 h-1 can be achieved. Furthermore, secondary and primary alkyl phosphines as well as PH3 can be added in a catalytic hydrophosphination reaction to a wide range of activated olefins such as α,β-unsaturated aldehydes, ketones, esters, and nitriles. But also, vinyl pyridine and some styrene derivatives are converted into the corresponding phosphanes.
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Affiliation(s)
- Aabid A Wani
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
| | - Juan José Gamboa Carballo
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
- Higher Institute of Technologies and Applied Sciences (InSTEC), University of Havana, Ave. S., Allende 1110, 10600 Havana, Cuba
| | - Harikrishnan Jayaprakash
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
| | - Michael Wörle
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
| | - Anna Widera
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences ETH, Zürich, Vladimir-Prelog-Weg 1, CH-8093, Zurich, Switzerland
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3
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Belli RG, Muir V, Dyck NB, Pantazis DA, Sousa TPA, Slusar CR, Parkin HC, Rosenberg L. Exploring Electrophilic Hydrophosphination via Metal Phosphenium Intermediates. Chemistry 2024; 30:e202302924. [PMID: 38242847 DOI: 10.1002/chem.202302924] [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: 09/08/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/21/2024]
Abstract
Two Mo(0) phosphenium complexes containing ancillary secondary phosphine ligands have been investigated with respect to their ability to participate in electrophilic addition at unsaturated substrates and subsequent P-H hydride transfer to "quench" the resulting carbocations. These studies provide stoichiometric "proof of concept" for a proposed new metal-catalyzed electrophilic hydrophosphination mechanism. The more strongly Lewis acidic phosphenium complex, [Mo(CO)4(PR2H)(PR2)]+ (R=Ph, Tolp), cleanly hydrophosphinates 1,1-diphenylethylene, benzophenone, and ethylene, while other substrates react rapidly to give products resulting from competing electrophilic processes. A less Lewis acidic complex, [Mo(CO)3(PR2H)2(PR2)]+, generally reacts more slowly but participates in clean hydrophosphination of a wider range of unsaturated substrates, including styrene, indene, 1-hexene, and cyclohexanone, in addition to 1,1-diphenylethylene, benzophenone, and ethylene. Mechanistic studies are described, including stoichiometric control reactions and computational and kinetic analyses, which probe whether the observed P-H addition actually does occur by the proposed electrophilic mechanism, and whether hydridic P-H transfer in this system is intra- or intermolecular. Preliminary reactivity studies indicate challenges that must be addressed to exploit these promising results in catalysis.
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Affiliation(s)
- Roman G Belli
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia, Canada, V8W 2Y2
| | - Vanessa Muir
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia, Canada, V8W 2Y2
| | - Nicholas B Dyck
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia, Canada, V8W 2Y2
| | - Dimitrios A Pantazis
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Tânia P A Sousa
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Carly R Slusar
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia, Canada, V8W 2Y2
| | - Hayley C Parkin
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia, Canada, V8W 2Y2
| | - Lisa Rosenberg
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia, Canada, V8W 2Y2
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4
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Adjei JA, Kerr MA, Ragogna PJ. UV induced hydrophosphination of dimethyl 2-vinylcyclopropane-1,1-dicarboxylate towards phosphine chalcogenides. Dalton Trans 2023; 52:6739-6748. [PMID: 37129227 DOI: 10.1039/d3dt00791j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Dimethyl 2-vinylcyclopropane-1,1-dicarboxylate underwent a hydrophosphination reaction with either a primary or secondary phosphine under photolytic conditions. Notably, a free radical initiator was not required. The resulting tertiary phosphines were derivatized using S8 to afford moisture and air stable yellow or colorless oils in a 27%-73% isolated yield. A series of control reactions were performed, and we propose that this UV induced hydrophosphination reaction proceeds through a radical mechanism.
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Affiliation(s)
- Jeanette A Adjei
- The University of Western Ontario, Department of Chemistry, UWO Chemistry Building, 1151 Richmond Street, London, ON N6A, Canada.
| | - Michael A Kerr
- The University of Western Ontario, Department of Chemistry, UWO Chemistry Building, 1151 Richmond Street, London, ON N6A, Canada.
| | - Paul J Ragogna
- The University of Western Ontario, Department of Chemistry, UWO Chemistry Building, 1151 Richmond Street, London, ON N6A, Canada.
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5
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Zhou H, Fan LW, Ren YQ, Wang LL, Yang CJ, Gu QS, Li ZL, Liu XY. Copper-Catalyzed Chemo- and Enantioselective Radical 1,2-Carbophosphonylation of Styrenes. Angew Chem Int Ed Engl 2023; 62:e202218523. [PMID: 36722939 DOI: 10.1002/anie.202218523] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/31/2023] [Accepted: 01/31/2023] [Indexed: 02/02/2023]
Abstract
The copper-catalyzed enantioselective radical difunctionalization of alkenes from readily available alkyl halides and organophosphorus reagents possessing a P-H bond provides an appealing approach for the synthesis of α-chiral alkyl phosphorus compounds. The major challenge arises from the easy generation of a P-centered radical from the P-H-type reagent and its facile addition to the terminal side of alkenes, leading to reverse chemoselectivity. We herein disclose a radical 1,2-carbophosphonylation of styrenes in a highly chemo- and enantioselective manner. The key to the success lies in not only the implementation of dialkyl phosphites with a strong bond dissociation energy to promote the desired chemoselectivity but also the utilization of an anionic chiral N,N,N-ligand to forge the chiral C(sp3 )-P bond. The developed Cu/N,N,N-ligand catalyst has enriched our library of single-electron transfer catalysts in the enantioselective radical transformations.
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Affiliation(s)
- Huan Zhou
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Li-Wen Fan
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yang-Qing Ren
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Li-Lei Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chang-Jiang Yang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China.,School of Science and Institute of Scientific Research, Great Bay University, Dongguan, 523000, China
| | - Qiang-Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zhong-Liang Li
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xin-Yuan Liu
- 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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6
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Seth DM, Waterman R. Photo-Initiated Radical Hydrophosphination at Titanium Compounds Capable of Ti–P Insertion. Organometallics 2023. [DOI: 10.1021/acs.organomet.3c00049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Dennis M. Seth
- Department of Chemistry, University of Vermont, 82 University Pl, Burlington, Vermont 05405, United States
| | - Rory Waterman
- Department of Chemistry, University of Vermont, 82 University Pl, Burlington, Vermont 05405, United States
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Reuter MB, Seth DM, Javier-Jiménez DR, Finfer EJ, Beretta EA, Waterman R. Recent advances in catalytic pnictogen bond forming reactions via dehydrocoupling and hydrofunctionalization. Chem Commun (Camb) 2023; 59:1258-1273. [PMID: 36648191 DOI: 10.1039/d2cc06143k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An examination of several catalytic reactions among the group 15 elements is presented. The connections between the chemistry of the pnictogens can sometimes be challenging, but aspects of metal-pnictogen reactivity are the key. The connecting reactivity comes from metal-catalyzed transformations such as dehydrocoupling and hydrofunctionalization. Pivotal mechanistic insights from E-N heterodehydrocoupling have informed the development of highly active catalysts for these reactions. Metal-amido nucleophilicity is often at the core of this reactivity, which diverges from phosphine and arsine dehydrocoupling. Nucleophilicity connects to the earliest understanding of hydrophosphination catalysis, but more recent catalysts are leveraging enhanced insertion activity through photolysis. This photocatalysis extends to hydroarsination, which may also have more metal-arsenido nucleophilicity than anticipated. However, metal-catalyzed arsinidene chemistry foreshadowed related phosphinidene chemistry by years. This examination shows the potential for greater influence of individual discoveries and understanding to leverage new advances between these elements, and it also suggests that the chemistry of heavier elements may have more influence on what is possible with lighter elements.
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Affiliation(s)
- Matthew B Reuter
- University of Vermont, Department of Chemistry, 82 University Place, Burlington, Vermont, USA.
| | - Dennis M Seth
- University of Vermont, Department of Chemistry, 82 University Place, Burlington, Vermont, USA.
| | - Diego R Javier-Jiménez
- University of Vermont, Department of Chemistry, 82 University Place, Burlington, Vermont, USA.
| | - Emma J Finfer
- University of Vermont, Department of Chemistry, 82 University Place, Burlington, Vermont, USA.
| | - Evan A Beretta
- University of Vermont, Department of Chemistry, 82 University Place, Burlington, Vermont, USA.
| | - Rory Waterman
- University of Vermont, Department of Chemistry, 82 University Place, Burlington, Vermont, USA.
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8
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Dannenberg SG, Seth DM, Finfer EJ, Waterman R. Divergent Mechanistic Pathways for Copper(I) Hydrophosphination Catalysis: Understanding That Allows for Diastereoselective Hydrophosphination of a Tri-substituted Styrene. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Steven G. Dannenberg
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405-0125, United States
| | - Dennis M. Seth
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405-0125, United States
| | - Emma J. Finfer
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405-0125, United States
| | - Rory Waterman
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405-0125, United States
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Belli RG, Yang J, Bahena EN, McDonald R, Rosenberg L. Mechanism and Catalyst Design in Ru-Catalyzed Alkene Hydrophosphination. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05636] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Roman G. Belli
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia V8W 2Y2, Canada
| | - Jin Yang
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia V8W 2Y2, Canada
| | - Erick Nuñez Bahena
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia V8W 2Y2, Canada
| | - Robert McDonald
- X-ray Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Lisa Rosenberg
- Department of Chemistry, University of Victoria, P.O. Box 1700, STN CSC, Victoria, British Columbia V8W 2Y2, Canada
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Bissessar D, Egly J, Achard T, Steffanut P, Mauro M, Bellemin-Laponnaz S. A stable and photoreactive copper iodide cubane suitable for direct post‐functionalization. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Damien Bissessar
- IPCMS: Institut de physique et chimie des materiaux de Strasbourg DMO FRANCE
| | - Julien Egly
- IPCMS: Institut de physique et chimie des materiaux de Strasbourg DMO FRANCE
| | - Thierry Achard
- IPCMS: Institut de physique et chimie des materiaux de Strasbourg DMO FRANCE
| | | | - Matteo Mauro
- IPCMS: Institut de physique et chimie des materiaux de Strasbourg DMO FRANCE
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Cyclo-Tetrakis(μ-diphenylphosphido)-1,5-bis(tri-tert-butylphosphine)-Tetracopper. MOLBANK 2022. [DOI: 10.3390/m1334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Copper phosphido compound Cu4(μ-PPh2)4(PtBu3)2 was synthesized by three synthetic methods and structurally characterized by X-ray diffraction and 1H, 31P, 13C and 31P HMBC NMR spectroscopy. Cu4(μ-PPh2)4(PtBu3)2 was also demonstrated to be a hydrophosphination pre-catalyst.
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12
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Primary Phosphines and Phosphine Oxides with a Stereogenic Carbon Center Adjacent to the Phosphorus Atom: Synthesis and Anti-Markovnikov Radical Addition to Alkenes. ORGANICS 2021. [DOI: 10.3390/org2040023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Organophosphorus compounds with stereogenic phosphorus and carbon atoms have received increasing attention. In this regards, primary phosphines with a stereogenic carbon atom adjacent to the phosphorus atom were synthesized by the reduction in phosphonates and phosphonoselenoates with a binaphthyl group. Their oxidized products, i.e., phosphine oxides with a stereogenic tetrasubstituted carbon atom, were found to undergo BEt3-mediated radical addition to cyclohexene to give P-stereogenic secondary phosphine oxides with a diastereoselectivity of 91:9. The products were characterized by ordinary analytical methods, such as Fourier transform infrared spectroscopy; 1H, 13C, and 31P NMR spectroscopies; and mass spectroscopy. Computational studies on the phosphorus-centered radical species and the obtained product implied that the thermodynamically stable radical and the adduct may be formed as a major diastereomer. The radical addition to a range of alkenes took place in an anti-Markovnikov fashion to give P-stereogenic secondary phosphine oxides. A variety of functional groups in the alkenes were tolerated under the reaction conditions to afford secondary phosphine oxides in moderate yields. Primary phosphines with an alkenyl group, which were generated in situ, underwent intramolecular cyclization to give five- and six-membered cyclic phosphines in high yields after protection by BH3.
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Varela-Izquierdo V, Geer AM, Navarro J, López JA, Ciriano MA, Tejel C. Rhodium Complexes in P-C Bond Formation: Key Role of a Hydrido Ligand. J Am Chem Soc 2021; 143:349-358. [PMID: 33356217 DOI: 10.1021/jacs.0c11010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Olefin hydrophosphanation is an attractive route for the atom-economical synthesis of functionalized phosphanes. This reaction involves the formation of P-C and H-C bonds. Thus, complexes that contain both hydrido and phosphanido functionalities are of great interest for the development of effective and fast catalysts. Herein, we showcase the excellent activity of one of them, [Rh(Tp)H(PMe3)(PPh2)] (1), in the hydrophosphanation of a wide range of olefins. In addition to the required nucleophilicity of the phosphanido moiety to accomplish the P-C bond formation, the key role of the hydride ligand in 1 has been disclosed by both experimental results and DFT calculations. An additional Rh-H···C stabilization in some intermediates or transition states favors the hydrogen transfer reaction from rhodium to carbon to form the H-C bond. Further support for our proposal arises from the poor activity exhibited by the related chloride complex [Rh(Tp)Cl(PMe3)(PPh2)] as well as from stoichiometric and kinetic studies.
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Affiliation(s)
- Víctor Varela-Izquierdo
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Ana M Geer
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Janeth Navarro
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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