1
|
Thönnißen V, Westphäling J, Atodiresei IL, Patureau FW. Atroposelective Chan-Evans-Lam Amination. Chemistry 2024; 30:e202304378. [PMID: 38179829 DOI: 10.1002/chem.202304378] [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: 12/31/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
The synthetic control of atropoisomerism along C-N bonds is a major challenge, and methods that allow C-N atroposelective bond formation are rare. This is a problem because each atropoisomer can feature starkly differentiated biological properties. Yet, among the three most practical and applicable classical amination methods available: 1) the Cu-catalyzed Ullmann-Goldberg reaction, 2) the Pd-catalyzed Buchwald-Hartwig reaction, and 3) the Cu-catalyzed Chan-Evans-Lam reaction, none has truly been rendered atroposelective at the newly formed C-N bond. The first ever Chan-Evans-Lam atroposelective amination is herein described with a simple copper catalyst and newly designed PyrOx chiral ligand. This method should find important applications in asymmetric synthesis, in particular for medicinal chemistry.
Collapse
Affiliation(s)
- Vinzenz Thönnißen
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Johannes Westphäling
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Iuliana L Atodiresei
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Frederic W Patureau
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| |
Collapse
|
2
|
Canac Y. Carbon-Phosphorus Ligands with Extreme Donating Character. CHEM REC 2023; 23:e202300187. [PMID: 37435947 DOI: 10.1002/tcr.202300187] [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: 05/24/2023] [Revised: 06/22/2023] [Indexed: 07/13/2023]
Abstract
Carbeniophosphines [R2 C+ -PR2 ] and phosphonium ylides [R3 P+ -CR2 - ] are two complementary classes of carbon-phosphorus based ligands defined by their unique donor properties. Indeed, while carbeniophosphines are electron-poor P-ligands due to the positioning of a positive charge near the coordinating P-atom, phosphonium ylides are electron-rich C-ligands due to the presence of a negatively charged coordinating C-atom. Based on this knowledge, this account summarizes our recent contribution on these two classes of carbon-phosphorus ligands, and in particular the strategies developed to lower the donor character of carbeniophosphines and enhance that of phosphonium ylides. This led us to design, at both extremities of the donating scale, extremely electron-poor P-ligands exemplified by imidazoliophosphonites [R2 C+ -P(OR)2 ] and dicarbeniophosphines [(R2 C+ )2 -PR], and extremely electron-rich C-ligands illustrated by pincer architectures exhibiting several phosphonium ylide donor extremities. In the context of carbon-phosphorus analogy, the closely related cases of ligands where the C-atom of a NHC ligand is in close proximity of two positive charges, and that of a phosphonium ylide coordinated through its P-atom are also discussed. An overview of the synthetic methods, coordinating properties, general reactivity and electronic structure of all these C,P-based species is presented here.
Collapse
Affiliation(s)
- Yves Canac
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| |
Collapse
|
3
|
Munawar A, Maltz LT, Liu WC, Gabbaï FP. Synthesis of an Indazole/Indazolium Phosphine Ligand Scaffold and Its Application in Gold(I) Catalysis. Organometallics 2023; 42:2742-2746. [PMID: 38357473 PMCID: PMC10863396 DOI: 10.1021/acs.organomet.3c00354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Indexed: 02/16/2024]
Abstract
Advances in ligand development have allowed for the fine-tuning of gold catalysis. To contribute to this field, we designed an indazole phosphine ligand scaffold that allows facile introduction of cationic charge through methylation. With minimal changes to the structure upon methylation, we could assess the importance of the electronic effects of the insertion of a positive charge on the catalytic activity of the resulting gold(I) complex. Using the benchmark reactions of propargyl amide cyclization and enyne cyclization with and without hexafluoroisopropanol (HFIP), we observed marked differences in the catalytic activities of the neutral and cationic gold species.
Collapse
Affiliation(s)
- Asima Munawar
- Department of Chemistry, Texas A&M University, College
Station, Texas 77843, United States
| | - Logan T. Maltz
- Department of Chemistry, Texas A&M University, College
Station, Texas 77843, United States
| | - Wei-Chun Liu
- Department of Chemistry, Texas A&M University, College
Station, Texas 77843, United States
| | - François P. Gabbaï
- Department of Chemistry, Texas A&M University, College
Station, Texas 77843, United States
| |
Collapse
|
4
|
Rodríguez‐Salamanca P, Fernández R, Hornillos V, Lassaletta JM. Asymmetric Synthesis of Axially Chiral C-N Atropisomers. Chemistry 2022; 28:e202104442. [PMID: 35191558 PMCID: PMC9314733 DOI: 10.1002/chem.202104442] [Citation(s) in RCA: 59] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Indexed: 12/16/2022]
Abstract
Molecules with restricted rotation around a single bond or atropisomers are found in a wide number of natural products and bioactive molecules as well as in chiral ligands for asymmetric catalysis and smart materials. Although most of these compounds are biaryls and heterobiaryls displaying a C-C stereogenic axis, there is a growing interest in less common and more challenging axially chiral C-N atropisomers. This review offers an overview of the various methodologies available for their asymmetric synthesis. A brief introduction is initially given to contextualize these axially chiral skeletons, including a historical background and examples of natural products containing axially chiral C-N axes. The preparation of different families of C-N based atropisomers is then presented from anilides to chiral five- and six-membered ring heterocycles. Special emphasis has been given to modern catalytic asymmetric strategies over the past decade for the synthesis of these chiral scaffolds. Applications of these methods to the preparation of natural products and biologically active molecules will be highlighted along the text.
Collapse
Affiliation(s)
- Patricia Rodríguez‐Salamanca
- Instituto de Investigaciones Químicas (CSIC-US) and Centro deInnovación en Química Avanzada (ORFEO-CINQA)C/ Américo Vespucio, 4941092SevillaSpain
| | - Rosario Fernández
- Departamento de Química OrgánicaUniversidad de Sevilla) and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González, 141012SevillaSpain
| | - Valentín Hornillos
- Instituto de Investigaciones Químicas (CSIC-US) and Centro deInnovación en Química Avanzada (ORFEO-CINQA)C/ Américo Vespucio, 4941092SevillaSpain
- Departamento de Química OrgánicaUniversidad de Sevilla) and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González, 141012SevillaSpain
| | - José M. Lassaletta
- Instituto de Investigaciones Químicas (CSIC-US) and Centro deInnovación en Química Avanzada (ORFEO-CINQA)C/ Américo Vespucio, 4941092SevillaSpain
| |
Collapse
|
5
|
Litle ED, Wilkins LC, Gabbaï FP. Ligand-enforced intimacy between a gold cation and a carbenium ion: impact on stability and reactivity. Chem Sci 2021; 12:3929-3936. [PMID: 34163662 PMCID: PMC8179465 DOI: 10.1039/d0sc05777k] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Controlling the reactivity of transition metal complexes by positioning non-innocent functionalities around the catalytic pocket is a concept that has led to significant advances in catalysis. Here we describe our efforts toward the synthesis of dicationic phosphine gold complexes of general formula [(o-Ph2P(C6H4)Carb)Au(tht)]2+ decorated by a carbenium moiety (Carb) positioned in the immediate vicinity of the gold center. While the most acidic examples of such compounds have limited stability, the dicationic complexes with Carb+ = 9-N-methylacridinium and Carb+ = [C(ArN)2]+ (ArN = p-(C6H4)NMe2) are active as catalysts for the cycloisomerization of N-propargyl-4-fluorobenzamide, a substrate chosen to benchmark reactivity. The dicationic complex [(o-Ph2P(C6H4)C(ArN)2)Au(tht)]2+, which also promotes hydroarylation and enyne cyclization reactions, displays a higher catalytic activity than its acridinium analog, indicating that the electrophilic reactivity of these complexes scales with the Lewis acidity of the carbenium moiety. These results support the role of the carbenium unit as a non-innocent functionality which can readily enhance the activity of the adjacent metal center. Finally, we also describe our efforts toward the generation and isolation of free γ-cationic phosphines of general formula [(o-Ph2P(C6H4)Carb)]+. While cyclization into phosphonium species is observed for Carb+ = [C(ArN)2]+, [C(Ph)(ArN)]+, and 9-xanthylium, [(o-Ph2P(C6H4)-9-N-methylacridinium)]+ can be isolated as an air stable, biphilic derivative with uncompromised Lewis acidic and basic properties. This work describes the synthesis of carbenium-based, γ-cationic phosphines and their coordination to Au(i) cations , leading to carbophilic catalysts whose activity is enhanced by the ligand-enforced convergence of the positively charged moieties.![]()
Collapse
Affiliation(s)
- Elishua D Litle
- Department of Chemistry, Texas A&M University College Station TX 77843 USA
| | - Lewis C Wilkins
- Department of Chemistry, Texas A&M University College Station TX 77843 USA
| | - François P Gabbaï
- Department of Chemistry, Texas A&M University College Station TX 77843 USA
| |
Collapse
|
6
|
Synthesis of Alkynyl Ketones by Sonogashira Cross-Coupling of Acyl Chlorides with Terminal Alkynes Mediated by Palladium Catalysts Deposited over Donor-Functionalized Silica Gel. Catalysts 2020. [DOI: 10.3390/catal10101186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Palladium catalysts deposited over silica gel bearing simple amine (≡Si(CH2)3NH2) and composite functional amide pendants equipped with various donor groups in the terminal position (≡Si(CH2)3NHC(O)CH2Y, Y = SMe, NMe2 and PPh2) were prepared and evaluated in Sonogashira-type cross-coupling of acyl chlorides with terminal alkynes to give 1,3-disubstituted prop-2-yn-1-ones. Generally, the catalysts showed good catalytic activity in the reactions of aroyl chlorides with aryl alkynes under relatively mild reaction conditions even without adding a copper co-catalyst. However, their repeated use was compromised by a significant loss of activity after the first catalytic run.
Collapse
|
7
|
Munzeiwa WA, Omondi B, Nyamori VO. Architecture and synthesis of P ,N-heterocyclic phosphine ligands. Beilstein J Org Chem 2020; 16:362-383. [PMID: 32256853 PMCID: PMC7082614 DOI: 10.3762/bjoc.16.35] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 02/19/2020] [Indexed: 11/23/2022] Open
Abstract
Diverse P,N-phosphine ligands reported to date have performed exceptionally well as auxiliary ligands in organometallic catalysis. Phosphines bearing 2-pyridyl moieties prominently feature in literature as compared to phosphines with five-membered N-heterocycles. This discussion seeks to paint a broad picture and consolidate different synthetic protocols and techniques for N-heterocyclic phosphine motifs. The introduction provides an account of P,N-phosphine ligands, and their structural and coordination benefits from combining heteroatoms with different basicity in one ligand. The body discusses the synthetic protocols which focus on P–C, P–N-bond formation, substrate and nucleophile types and different N-heterocycle construction strategies. Selected references are given in relation to the applications of the ligands.
Collapse
Affiliation(s)
- Wisdom A Munzeiwa
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Bernard Omondi
- School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville, Pietermaritzburg 3201, South Africa
| | - Vincent O Nyamori
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| |
Collapse
|
8
|
Acyl Sonogashira Cross-Coupling: State of the Art and Application to the Synthesis of Heterocyclic Compounds. Catalysts 2019. [DOI: 10.3390/catal10010025] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The acyl Sonogashira reaction represents an extension of Sonogashira cross-coupling to acid chlorides which replace aryl or vinyl halides, while terminal acetylenes are used as coupling partners in both reactions. The introduction of a carbonyl functional group on the alkyne backbone determines a radical change in the reactivity of the products. Indeed, α,β-alkynyl ketones can be easily converted into different heterocyclic compounds depending on the experimental conditions employed. Due to its potential, the acyl Sonogashira reaction has been deeply studied with particular attention to the nature of the catalysts and to the structures of both coupling compounds. Considering these two aspects, in this review, a detailed analysis of the literature data regarding the acyl Sonogashira reaction and its role in the synthesis of several heterocyclic derivatives is reported.
Collapse
|
9
|
Doddi A, Peters M, Tamm M. N-Heterocyclic Carbene Adducts of Main Group Elements and Their Use as Ligands in Transition Metal Chemistry. Chem Rev 2019; 119:6994-7112. [PMID: 30983327 DOI: 10.1021/acs.chemrev.8b00791] [Citation(s) in RCA: 302] [Impact Index Per Article: 60.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
N-Heterocyclic carbenes (NHC) are nowadays ubiquitous and indispensable in many research fields, and it is not possible to imagine modern transition metal and main group element chemistry without the plethora of available NHCs with tailor-made electronic and steric properties. While their suitability to act as strong ligands toward transition metals has led to numerous applications of NHC complexes in homogeneous catalysis, their strong σ-donating and adaptable π-accepting abilities have also contributed to an impressive vitalization of main group chemistry with the isolation and characterization of NHC adducts of almost any element. Formally, NHC coordination to Lewis acids affords a transfer of nucleophilicity from the carbene carbon atom to the attached exocyclic moiety, and low-valent and low-coordinate adducts of the p-block elements with available lone pairs and/or polarized carbon-element π-bonds are able to act themselves as Lewis basic donor ligands toward transition metals. Accordingly, the availability of a large number of novel NHC adducts has not only produced new varieties of already existing ligand classes but has also allowed establishment of numerous complexes with unusual and often unprecedented element-metal bonds. This review aims at summarizing this development comprehensively and covers the usage of N-heterocyclic carbene adducts of the p-block elements as ligands in transition metal chemistry.
Collapse
Affiliation(s)
- Adinarayana Doddi
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany
| | - Marius Peters
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Tamm
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany
| |
Collapse
|
10
|
Nicholls LDM, Alcarazo M. Applications of α-Cationic Phosphines as Ancillary Ligands in Homogeneous Catalysis. CHEM LETT 2019. [DOI: 10.1246/cl.180810] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Leo D. M. Nicholls
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| |
Collapse
|
11
|
Canac Y. Carbeniophosphines versus Phosphoniocarbenes: The Role of the Positive Charge. Chem Asian J 2018; 13:1872-1887. [PMID: 29761658 DOI: 10.1002/asia.201800483] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 05/11/2018] [Indexed: 12/18/2022]
Abstract
The chemistry of carbeniophosphines and phosphoniocarbenes, which have general structures derived formally from the three-component "carbene/phosphine/positive charge" association, is presented. These two complementary classes of carbon-phosphorus-based ligands, defined by the presence of an inverted cationic coordinating structure (C+ ∼P: vs. P+ ∼C:) have the common purpose of positioning a positive charge in the vicinity of the metal center. Through selected examples, the synthetic methods, coordination properties, and general reactivity of both cationic species is described. Particular emphasis is placed on the influence of the positive charge on the respective chemical behavior of the two classes of compound.
Collapse
Affiliation(s)
- Yves Canac
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| |
Collapse
|
12
|
Bonne D, Rodriguez J. A Bird's Eye View of Atropisomers Featuring a Five-Membered Ring. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800078] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Damien Bonne
- Aix Marseille Université, CNRS; iSm2 Centrale Marseille France
| | - Jean Rodriguez
- Aix Marseille Université, CNRS; iSm2 Centrale Marseille France
| |
Collapse
|
13
|
Zhu C, Gras E, Duhayon C, Lacassin F, Cui X, Chauvin R. The Forgotten Nitroaromatic Phosphines as Weakly Donating P-ligands: AnN-Aryl-benzimidazolyl Series in RhCl(CO) Complexes. Chem Asian J 2017; 12:2845-2856. [DOI: 10.1002/asia.201701078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Chongwei Zhu
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Emmanuel Gras
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Carine Duhayon
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Francis Lacassin
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Xiuling Cui
- Engineering Research Center of Molecular Medicine, Ministry of Education, Key Laboratory of Xiamen Marine and Gene Drugs, Institutes of Molecular Medicine and School of Biomedical Sciences; Huaqiao University; Xiamen 361021 P.R. China
| | - Remi Chauvin
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
- Engineering Research Center of Molecular Medicine, Ministry of Education, Key Laboratory of Xiamen Marine and Gene Drugs, Institutes of Molecular Medicine and School of Biomedical Sciences; Huaqiao University; Xiamen 361021 P.R. China
| |
Collapse
|
14
|
Ruamps M, Lugan N, César V. Experimental Assessment of the π-Acidity of Anionic and Neutral Malonate-Derived N-Heterocyclic Carbenes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700883] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mirko Ruamps
- LCC-CNRS; Université de Toulouse, INPT, UPS; 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Noël Lugan
- LCC-CNRS; Université de Toulouse, INPT, UPS; 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Vincent César
- LCC-CNRS; Université de Toulouse, INPT, UPS; 205 route de Narbonne 31077 Toulouse Cedex 4 France
| |
Collapse
|
15
|
Abstract
In α-cationic phosphines, at least one of the three substituents on phosphorus corresponds to a cationic (normally, but not always heteroaromatic) group, which is attached without any spacer to the phosphorus atom by a relatively inert P-C bond. This unique architecture confers to the resulting ligand strong acceptor properties, which frequently surpass those of traditional acceptor ligands such as phosphites or polyfluorinated phosphines. In addition, the fine-tuning of the stereoelectronic properties of α-cationic phosphines is also possible by judicious selection of the number and nature of the cationic groups. The opportunities offered in catalysis by α-cationic ligands arise from this ability to deplete electron density from the metals they coordinate. Thus, if in a hypothetical catalytic cycle the step that determines the rate is facilitated by an increase of the Lewis acidity at the metal center, then an acceleration of the whole process is expected by their use as ancillary ligands. Interestingly, this situation is found more frequently than one might think; many common elementary steps involved in catalytic cycles, such as reductive eliminations, coordination of substrates to metals, or attack of nucleophiles to coordinated substrates, belong to this category and are often fostered by electron poor metal centers. In this regard, our group has observed remarkable ligand acceleration effects by the employment of α-cationic phosphines in Au(I)- and Pt(II)-promoted hydroarylation and cycloisomerization reactions. These results seem to be general in π-acid catalysis when the nucleophile used is not especially electron rich because then their attack to the activated alkene or alkyne is normally rate determining. On the other hand, the use of cationic phosphines also presents drawbacks that limit their range of application. As a general rule, the reduced σ-donation from the phosphine is not compensated by the increased π-back-donation from the metal making the resulting phosphorus-metal bond weaker, and the corresponding catalysts more prone to decomposition. This can be critical when di- or tricationic ancillary ligands are used. In addition, the positively charged groups occasionally participate in undesired side reactions, with either the metal or the substrate, which are not present when their neutral congeners are used. Stimulated by both the fundamental questions regarding bonding and their valuable applications in catalysis, the chemistry of α-cationic phosphines has experienced an enormous growth during the last years. This Account describes our group's efforts and those of others to understand their coordination behavior, study their reactivity, and further develop their range of applications in catalysis.
Collapse
Affiliation(s)
- Manuel Alcarazo
- Institut für Organische
und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße
2, 37077 Göttingen, Germany
| |
Collapse
|
16
|
Mehler G, Linowski P, Carreras J, Zanardi A, Dube JW, Alcarazo M. Bis(cyclopropenium)phosphines: Synthesis, Reactivity, and Applications. Chemistry 2016; 22:15320-15327. [PMID: 27634750 DOI: 10.1002/chem.201601759] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Indexed: 11/08/2022]
Abstract
A straightforward route for the preparation of a set of bis(cyclopropenium)-substituted phosphines is reported. Due to their dicationic nature, these ligands depict an excellent π-acceptor character. The effect of the ligand substituent pattern on the catalytic activity of the metal complexes thereof derived is also studied. Whereas sterically demanding biaryl groups directly attached to the phosphorus atom seem to facilitate elementary steps such as the product release from the catalyst, long chain dialkylamino groups on the cyclopropenium units maximize the catalysts solubility and, thus, allow the use of typical apolar solvents such as toluene. Importantly, all new ligands prepared can be easily handled in air. Finally, the impact of the newly prepared dicationic phosphines in hydroarylation reactions is demonstrated. In particular, their use in the synthesis of several naphtho[1,2-b]furanes and naturally occurring naphthalene derivatives such as Calanquinone C is reported.
Collapse
Affiliation(s)
- Gerlinde Mehler
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Pawel Linowski
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Javier Carreras
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Alessandro Zanardi
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Jonathan W Dube
- Georg-August-Universität Göttingen, Tammanstraße 2, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Georg-August-Universität Göttingen, Tammanstraße 2, 37077, Göttingen, Germany.
| |
Collapse
|
17
|
Dube JW, Zheng Y, Thiel W, Alcarazo M. α-Cationic Arsines: Synthesis, Structure, Reactivity, and Applications. J Am Chem Soc 2016; 138:6869-77. [PMID: 27214007 DOI: 10.1021/jacs.6b03500] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of structurally differentiated cationic arsines containing imidazolium, cyclopropenium, formamidinium, and pyridinium substituents have been synthesized through short and scalable routes. Evaluation of the donor properties of these compounds by IR spectroscopy and DFT calculations reveals similar σ-electron-releasing abilities for all of them; however, their π-acceptor properties are strongly influenced by the nature of the positively charged group. We describe the coordination chemistry of the newly prepared α-cationic arsines toward different metal centers and their reactivity in the presence of strong oxidants to afford cationic As(V) species. Their unique electronic properties have been exploited in Pt(II) catalysis to develop a new catalyst with remarkable activity in the cycloisomerization of enynes to trisubstituted cyclopropanes. To the best of our knowledge, this is the first report on the use of α-cationic arsine ligands in catalysis.
Collapse
Affiliation(s)
- Jonathan W Dube
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen , Tammannstraße 2, 37077 Göttingen, Germany.,Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Yiying Zheng
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen , Tammannstraße 2, 37077 Göttingen, Germany
| |
Collapse
|
18
|
Lepetit C, Maraval V, Canac Y, Chauvin R. On the nature of the dative bond: Coordination to metals and beyond. The carbon case. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.07.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
19
|
Li YQ, Liu H, Wang P, Yang D, Zhao XL, Liu Y. Immobilization of a rhodium catalyst using a diphosphine-functionalized ionic liquid in RTIL for the efficient and recyclable biphasic hydroformylation of 1-octene. Faraday Discuss 2016; 190:219-30. [DOI: 10.1039/c5fd00195a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A highly efficient and stable Rh–P catalytic system in the RTIL of [PEmim]BF4 was developed for the biphasic hydroformylation of 1-octene by using the diphosphine-functionalized ionic liquid (FIL) of 2. While 2-Rh(acac)(CO)2 was immobilized in [PEmim]BF4 (solvent), a typical biphasic catalysis was fulfilled with advantages of facile separation and recycling ability – 9 runs without any loss of activity. It was found that not only the acquired π-acceptor character of 2, but also the synergetic role of the piperidyl group in [PEmim]BF4 as an N-containing donor, cooperatively contributed to the efficient hydroformylation due to the facilitated formation and stability of the Rh-H active species (ν 2045 cm−1). This was supported by the in situ high-pressure FT-IR spectral analysis.
Collapse
Affiliation(s)
- Yong-Qi Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Huan Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Peng Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Da Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Xiao-Li Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Ye Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| |
Collapse
|
20
|
Effect of positive-charges in diphosphino-imidazolium salts on the structures of Ir-complexes and catalysis for hydroformylation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2015.11.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
21
|
Dubrulle L, Poidevin C, Maaliki C, Canac Y, Lepetit C, Duhayon C, Chauvin R. A Push-Pull PdIIComplex with a Ternary Pd-P-C+Accepting End and a Key N-Heterocyclic Carbene-Imidazoliophosphine Ligand. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500932] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
22
|
Chang YC, Chang CH, Wang LW, Liang YH, Hu DF, Weng CM, Mao KC, Hong FE. Imidazolio-substituted secondary phosphine oxides as potential carbene reagents. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.08.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
23
|
Vabre B, Canac Y, Lepetit C, Duhayon C, Chauvin R, Zargarian D. Charge Effects in PCP Pincer Complexes of NiIIbearing Phosphinite and Imidazol(i)ophosphine Coordinating Jaws: From Synthesis to Catalysis through Bonding Analysis. Chemistry 2015; 21:17403-14. [DOI: 10.1002/chem.201502491] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 11/11/2022]
|
24
|
Chen SJ, Li YQ, Wang P, Lu Y, Zhao XL, Liu Y. Promotion effect of water on hydroformylation of styrene and its derivatives with presence of amphiphilic zwitterionic phosphines. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.07.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
25
|
Laborde C, Wei MM, van der Lee A, Deydier E, Daran JC, Volle JN, Poli R, Pirat JL, Manoury E, Virieux D. Double [3 + 2]-dimerisation cascade synthesis of bis(triazolyl)bisphosphanes, a new scaffold for bidentate bisphosphanes. Dalton Trans 2015; 44:12539-45. [PMID: 26105114 DOI: 10.1039/c5dt02197a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A highly convergent synthesis of bis(triazolylphosphane oxides) was developed by a tandem copper-mediated Huisgen reaction-oxidative coupling. The phosphane oxides were reduced by trichlorosilane and the coordination of the resulting bisphosphanes was studied with various transition metals.
Collapse
Affiliation(s)
- Coralie Laborde
- Institut Charles Gerhardt/UMR 5253/AM2N, Ecole Nationale Supérieur de Chimie de Montpellier, 8, Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Karthik V, Gupta V, Anantharaman G. Synthesis, Structure, and Coordination Chemistry of Phosphine-Functionalized Imidazole/Imidazolium Salts and Cleavage of a C–P Bond in an NHC–Phosphenium Salt using a Pd(0) Precursor. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00336] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vedhagiri Karthik
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Vivek Gupta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | | |
Collapse
|
27
|
Haldón E, Kozma Á, Tinnermann H, Gu L, Goddard R, Alcarazo M. Synthesis and reactivity of α-cationic phosphines: the effect of imidazolinium and amidinium substituents. Dalton Trans 2015; 45:1872-6. [PMID: 26174600 DOI: 10.1039/c5dt02341f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mono- and dicationic phosphines have been synthesized through the reaction of chloroimidazolinium or chloroamidinium salts with secondary or primary phosphines respectively. The resulting ligands, which depict a significantly reduced donor ability compared with their neutral analogues, have been used to design Pt(II) and Au(I) complexes that effectively catalyse the hydroarylation of alkynes.
Collapse
Affiliation(s)
- Estela Haldón
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470-Mülheim an der Ruhr, Germany.
| | | | | | | | | | | |
Collapse
|
28
|
Makaya AM, Canac Y, Bijani C, Duhayon C, Chauvin R. On the Theme of Amidiniophosphines: Synthesis and Reactivity of Benzo-, Diimidazolo-Tris-Annelated P-Aminodiazaphosphepines. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.1002613] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Amelle Mankou Makaya
- CNRS, LCC (Laboratoire de Chimie de Coordination), Narbonne, F-31077 Toulouse France
- Université de Toulouse—UPS, INP—LCC; F-31077 Toulouse, France
| | - Yves Canac
- CNRS, LCC (Laboratoire de Chimie de Coordination), Narbonne, F-31077 Toulouse France
- Université de Toulouse—UPS, INP—LCC; F-31077 Toulouse, France
| | - Christian Bijani
- CNRS, LCC (Laboratoire de Chimie de Coordination), Narbonne, F-31077 Toulouse France
- Université de Toulouse—UPS, INP—LCC; F-31077 Toulouse, France
| | - Carine Duhayon
- CNRS, LCC (Laboratoire de Chimie de Coordination), Narbonne, F-31077 Toulouse France
- Université de Toulouse—UPS, INP—LCC; F-31077 Toulouse, France
| | - Remi Chauvin
- CNRS, LCC (Laboratoire de Chimie de Coordination), Narbonne, F-31077 Toulouse France
- Université de Toulouse—UPS, INP—LCC; F-31077 Toulouse, France
| |
Collapse
|
29
|
Kozma Á, Rust J, Alcarazo M. Bis[(dialkylamino)cyclopropenimine]-Stabilized P(III) - and P(V) -Centered Dications. Chemistry 2015; 21:10829-34. [PMID: 26097007 DOI: 10.1002/chem.201500688] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 04/24/2015] [Indexed: 11/09/2022]
Abstract
The treatment of bis[(dialkylamino)cyclopropenimines] with dihalophosphines in the presence of trimethylsilyl trifluoromethanesulfonate (TMSOTf) to form diimine-stabilized P(III) -centered dications is reported. The structures of the new compounds were determined by using X-ray diffraction analysis and their donor abilities as ligands evaluated through electrochemical methods. Despite the two positive charges that they bear, these compounds depict intermediate behavior between that of phosphines and phosphites. The coordination of the [L2 PR](2+) moiety to Au(I) and Ag(I) is also reported. Even more surprisingly, these phosphorus centers can be oxidized to the corresponding P(V) dications in the presence of strong oxidants such as peroxides or XeF2 .
Collapse
Affiliation(s)
- Ágnes Kozma
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470 Mülheim an der Ruhr (Germany)
| | - Jörg Rust
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470 Mülheim an der Ruhr (Germany)
| | - Manuel Alcarazo
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470 Mülheim an der Ruhr (Germany).
| |
Collapse
|
30
|
Klingele J. Low-melting complexes with cationic side chains – Phosphonium-, ammonium- and imidazolium-tagged coordination compounds. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
31
|
Brill M, Rominger F, Hofmann P. 1,2-Bis(di-tert-butylphosphino)imidazole (dtbpi): A Versatile Imidazole-Based, Rigid, Bulky Bisphosphine Ligand for Transition Metals. Organometallics 2015. [DOI: 10.1021/om501145b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Marcel Brill
- Organisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | - Peter Hofmann
- Organisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| |
Collapse
|
32
|
Abdellah I, Canac Y, Mboyi CD, Duhayon C, Chauvin R. Copper(I) complexes of chelating imidazolo- and imidazolio-diphosphines. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.10.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
33
|
Chen SJ, Li YQ, Wang YY, Zhao XL, Liu Y. Ionic Rh(I)-complexes containing π-accepting and hemilabile P,N-ligands as efficient catalysts for hydroformylation of 1-octene. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2014.09.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
34
|
Gu L, Gopakumar G, Gualco P, Thiel W, Alcarazo M. Bis- and tris(pyrazolyl)borate/methane-stabilized P(III) -centered cations. Chemistry 2014; 20:8575-8. [PMID: 24898514 DOI: 10.1002/chem.201402636] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 05/02/2014] [Indexed: 11/11/2022]
Abstract
We report the synthesis of [H2 B(pz)2 PR](+) , [H2 C(pz)2 PR](+2) , [HB(pz)3 P](+2) , and [HC(pz)3 P](+3) (H2 B(pz)2 =bis(pyrazolyl)borate; H2 C(pz)2 =bis(pyrazolyl)methane; HB(pz)3 =tris(pyrazolyl)borate; HC(pz)3 =tris(pyrazolyl) methane; R=Ph, Cy or Et2 N) by reaction of the corresponding neutral or anionic ligands with chlorophosphines in the presence of TMSOTf. The structures of these compounds were determined by X-ray crystallographic analysis and the nature of their bonding was examined using density functional theory.
Collapse
Affiliation(s)
- Lianghu Gu
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470 Mülheim an der Ruhr (Germany), Fax: (+49) 208-306-2994
| | | | | | | | | |
Collapse
|
35
|
Abstract
In coordination chemistry, typical ancillary ligands are anionic or neutral species. Cationic ones are exceptions and, when used, the positively charged groups are normally attached to the periphery and not close to the donating atom. However, this concept article highlights a series of recent experimental, as well as theoretical results, suggesting that the utility in catalysis of cationic phosphines with no spacer between the phosphorus atom and the positively charged group(s) has been largely overlooked. In fact, a growing number of studies indicate that, because of their specific architecture, these cationic ligands depict excellent π-acceptor character that can exceed that of phosphites or polyfluorinated phosphines. This property has been used to increase the Lewis acidity of the metals they coordinate. Specifically, new extreme π-acid catalysts, mainly based on Pt(II) and Au(I) , have been recently prepared and their superior performance demonstrated along several mechanistically distinct transformations. In this concept article the current state of the art is critically assessed and possible future directions of the topic discussed.
Collapse
Affiliation(s)
- Manuel Alcarazo
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 41470 Mülheim an der Ruhr (Germany).
| |
Collapse
|
36
|
Chen SJ, Wang YY, Li YQ, Zhao XL, Liu Y. Ion-pair effect of phosphino-imidazolium salts on Rh(III)-complex catalyzed hydroformylation of 1-octene in water suspension. CATAL COMMUN 2014. [DOI: 10.1016/j.catcom.2014.02.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
37
|
Chen SJ, Wang YY, Yao WM, Zhao XL, VO-Thanh G, Liu Y. An ionic phosphine-ligated rhodium(III) complex as the efficient and recyclable catalyst for biphasic hydroformylation of 1-octene. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.07.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
38
|
Canac Y, Bijani C, Duhayon C, Chauvin R. Electrostatic Control of Pd2+ → Ag+ Transmetalation of a Bis-Imidazoliophosphine Ligand. Organometallics 2013. [DOI: 10.1021/om400602a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yves Canac
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne,
F-31077 Toulouse, France
- Université de Toulouse, UPS, INP,
LCC, F-31077 Toulouse, France
| | - Christian Bijani
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne,
F-31077 Toulouse, France
- Université de Toulouse, UPS, INP,
LCC, F-31077 Toulouse, France
| | - Carine Duhayon
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne,
F-31077 Toulouse, France
- Université de Toulouse, UPS, INP,
LCC, F-31077 Toulouse, France
| | - Remi Chauvin
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne,
F-31077 Toulouse, France
- Université de Toulouse, UPS, INP,
LCC, F-31077 Toulouse, France
| |
Collapse
|
39
|
Mboyi CD, Abdellah I, Duhayon C, Canac Y, Chauvin R. Versatile Pd-Catalyzed CH Oxidative Cyclization of Homoallylhydrazones to Pyrazolines and Tetrahydropyridazines. ChemCatChem 2013. [DOI: 10.1002/cctc.201300220] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
40
|
You H, Wang Y, Zhao X, Chen S, Liu Y. Stable Ionic Rh(I,II,III) Complexes Ligated by an Imidazolium-Substituted Phosphine with π-Acceptor Character: Synthesis, Characterization, and Application to Hydroformylation. Organometallics 2013. [DOI: 10.1021/om400171t] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongxing You
- Shanghai Key Laboratory
of Green Chemistry and Chemical Processes, East China Normal University, 3663 North Zhongshan
Road, 200062 Shanghai, People’s Republic of China
| | - Yongyong Wang
- Shanghai Key Laboratory
of Green Chemistry and Chemical Processes, East China Normal University, 3663 North Zhongshan
Road, 200062 Shanghai, People’s Republic of China
| | - Xiaoli Zhao
- Shanghai Key Laboratory
of Green Chemistry and Chemical Processes, East China Normal University, 3663 North Zhongshan
Road, 200062 Shanghai, People’s Republic of China
| | - Shengjie Chen
- Shanghai Key Laboratory
of Green Chemistry and Chemical Processes, East China Normal University, 3663 North Zhongshan
Road, 200062 Shanghai, People’s Republic of China
| | - Ye Liu
- Shanghai Key Laboratory
of Green Chemistry and Chemical Processes, East China Normal University, 3663 North Zhongshan
Road, 200062 Shanghai, People’s Republic of China
| |
Collapse
|
41
|
Gaillard S, Renaud JL. When phosphorus and NHC (N-heterocyclic carbene) meet each other. Dalton Trans 2013; 42:7255-70. [DOI: 10.1039/c2dt32789a] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
42
|
Maaliki C, Canac Y, Lepetit C, Duhayon C, Chauvin R. P-oxidation of gem-dicationic phosphines. RSC Adv 2013. [DOI: 10.1039/c3ra43563f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
43
|
Barthes C, Lepetit C, Canac Y, Duhayon C, Zargarian D, Chauvin R. P(CH)P Pincer Rhodium(I) Complexes: The Key Role of Electron-Poor Imidazoliophosphine Extremities. Inorg Chem 2012; 52:48-58. [DOI: 10.1021/ic3006508] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Cécile Barthes
- CNRS, LCC (Laboratoire
de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse,
France
- Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France
| | - Christine Lepetit
- CNRS, LCC (Laboratoire
de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse,
France
- Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France
| | - Yves Canac
- CNRS, LCC (Laboratoire
de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse,
France
- Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France
| | - Carine Duhayon
- CNRS, LCC (Laboratoire
de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse,
France
- Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal,
Québec H3C 3J7, Canada
| | - Remi Chauvin
- CNRS, LCC (Laboratoire
de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse,
France
- Université de Toulouse, UPS, INP, LCC, F-31077 Toulouse, France
| |
Collapse
|
44
|
Vabre B, Canac Y, Duhayon C, Chauvin R, Zargarian D. Nickel(II) complexes of the new pincer-type unsymmetrical ligands PIMCOP, PIMIOCOP, and NHCCOP: versatile binding motifs. Chem Commun (Camb) 2012; 48:10446-8. [PMID: 22990128 DOI: 10.1039/c2cc35377f] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chelation/nickellation of an unsymmetrical meta-phenylene-based ligand featuring phosphinite and imidazolophosphine functionalities gives the corresponding pincer complex. N-Methylation of the latter generates a new complex featuring the ternary moiety NHC→Ph(2)P(+)→Ni, which can be converted subsequently into the binary moiety NHC→Ni by extrusion of Ph(2)P(+), thus allowing a sequential synthesis of pincer complexes displaying varying degrees of dipolar character.
Collapse
Affiliation(s)
- Boris Vabre
- Département de chimie, Université de Montréal, C. P. 6128, Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
| | | | | | | | | |
Collapse
|
45
|
Wang N, McCormick TM, Ko SB, Wang S. PtII
and PdII
Complexes with a trans
-Chelating Bis(pyridyl) Ligand. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200442] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
46
|
Zhou C, Zhang J, Đaković M, Popović Z, Zhao X, Liu Y. Synthesis of an Ionic Paramagnetic Ruthenium(III) Complex and Its Application as an Efficient and Recyclable Catalyst for the Transfer Hydrogenation of Ketones. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200280] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
47
|
Maaliki C, Lepetit C, Canac Y, Bijani C, Duhayon C, Chauvin R. On the P-Coordinating Limit of NHC-Phosphenium Cations toward RhICenters. Chemistry 2012; 18:7705-14. [DOI: 10.1002/chem.201104046] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Revised: 02/27/2012] [Indexed: 11/09/2022]
|
48
|
Milde B, Packheiser R, Hildebrandt S, Schaarschmidt D, Rüffer T, Lang H. Imidazole Phosphines: Synthesis, Reaction Chemistry, and Their Use in Suzuki C,C Cross-Coupling Reactions. Organometallics 2012. [DOI: 10.1021/om300145d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bianca Milde
- Department of Inorganic Chemistry,
Institute of Chemistry,
Faculty of Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Rico Packheiser
- Department of Inorganic Chemistry,
Institute of Chemistry,
Faculty of Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Stefanie Hildebrandt
- Department of Inorganic Chemistry,
Institute of Chemistry,
Faculty of Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Dieter Schaarschmidt
- Department of Inorganic Chemistry,
Institute of Chemistry,
Faculty of Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Tobias Rüffer
- Department of Inorganic Chemistry,
Institute of Chemistry,
Faculty of Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Heinrich Lang
- Department of Inorganic Chemistry,
Institute of Chemistry,
Faculty of Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| |
Collapse
|
49
|
Ruiz J, Mesa AF. A 4,5-Diphosphino-Substituted Imidazolium Salt: A Building Block for the Modular Synthesis of Mixed Diphosphine-NHC Heterometallic Complexes. Chemistry 2012; 18:4485-8. [DOI: 10.1002/chem.201200031] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Indexed: 11/09/2022]
|
50
|
Milde B, Schaarschmidt D, Rüffer T, Lang H. Phosphino imidazoles and imidazolium salts for Suzuki C–C coupling reactions. Dalton Trans 2012; 41:5377-90. [DOI: 10.1039/c2dt12322c] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|