1
|
Lorenzo Ocampo MV, Murray LJ. Ligand Noninnocence in β-Diketiminate and β-Diketimine Copper Complexes. Inorg Chem 2024. [PMID: 39094038 DOI: 10.1021/acs.inorgchem.4c01613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Metal-ligand cooperative systems have a long precedent in catalysis, with the classification depending on the site of substrate bond cleavage and formation and on redox state changes. Recently, our group reported the participation of a β-diketiminate ligand in chemical bonding to heterocumulenes such as CO2 and CS2 by tricopper complexes, leading to cooperative catalysis. Herein, we report the reactivity of these copper clusters, [Cu3EL]- (E = S, Se; L = tris(β-diketiminate) cyclophane ligand), toward other electrophiles, viz. alkyl halides and Brønsted acids. We identified a family of ligand-functionalized complexes, Cu3EL (R) (R = primary alkyls), and a series of disubstituted products, Cu3EL (R)2, through single-crystal X-ray diffraction, mass spectrometry, and infrared and UV-visible spectroscopy. As part of mechanistic studies on these alkylation reactions, we evaluated the acid-base reactivity of these complexes and the influence of the backbone substitution on the reduction potential. Implications of these findings for ligand noninnocence and the relevance of the metal core as a cofactor for the ligand's reactivity are discussed.
Collapse
Affiliation(s)
- M Victoria Lorenzo Ocampo
- Center for Catalysis, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Leslie J Murray
- Center for Catalysis, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| |
Collapse
|
2
|
Lee JR, Hwang SJ, Choi Y, Kim J, Lee GS, Lee BS, Kim KH, Kang KB, Lee HJ, Kim CS. Structural Diversification of Pyrazinone Metabolites via Spontaneous Oxa-Michael Addition in Staphylococcus xylosus. JOURNAL OF NATURAL PRODUCTS 2024; 87:1881-1887. [PMID: 38950087 DOI: 10.1021/acs.jnatprod.4c00252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
A family of pyrazinone metabolites (1-11) were characterized from Staphylococcus xylosus ATCC 29971. Six of them were hydroxylated or methoxylated, which were proposed to be produced by the rare noncatalytic oxa-Michael addition reaction with a water or methanol molecule. It was confirmed that isopropyl alcohol can also be the Michael donor of the reaction. 1-7 and the synthetic precursor 2a showed significant inhibition of breast cancer cell migration.
Collapse
Affiliation(s)
- Ju Ryeong Lee
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Su Jung Hwang
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yukyung Choi
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Jonghwan Kim
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Gyu Sung Lee
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Bum Soo Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyo Bin Kang
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Hyo-Jong Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Chung Sub Kim
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| |
Collapse
|
3
|
Gulyaeva ES, Buhaibeh R, Boundor M, Azouzi K, Willot J, Bastin S, Duhayon C, Lugan N, Filippov OA, Sortais JB, Valyaev DA, Canac Y. Impact of the Methylene Bridge Substitution in Chelating NHC-Phosphine Mn(I) Catalyst for Ketone Hydrogenation. Chemistry 2024; 30:e202304201. [PMID: 38314964 DOI: 10.1002/chem.202304201] [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: 12/17/2023] [Revised: 02/03/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
Systematic modification of the chelating NHC-phosphine ligand (NHC = N-heterocyclic carbene) in highly efficient ketone hydrogenation Mn(I) catalyst fac-[(Ph2PCH2NHC)Mn(CO)3Br] has been performed and the catalytic activity of the resulting complexes was evaluated using acetophenone as a benchmark substrate. While the variation of phosphine and NHC moieties led to inferior results than for a parent system, the incorporation of a phenyl substituent into the ligand methylene bridge improved catalytic performance by ca. 3 times providing maximal TON values in the range of 15000-20000. Mechanistic investigation combining experimental and computational studies allowed to rationalize this beneficial effect as an enhanced stabilization of reaction intermediates including anionic hydride species fac-[(Ph2PC(Ph)NHC)Mn(CO)3H]- playing a crucial role in the hydrogenation process. These results highlight the interest of such carbon bridge substitution strategy being rarely employed in the design of chemically non-innocent ligands.
Collapse
Affiliation(s)
- Ekaterina S Gulyaeva
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences, 28/1 Vavilov str., GSP-1, B-334, Moscow, 119334, Russia
| | - Ruqaya Buhaibeh
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Mohamed Boundor
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Karim Azouzi
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Jérémy Willot
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Stéphanie Bastin
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Carine Duhayon
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Noël Lugan
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Oleg A Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences, 28/1 Vavilov str., GSP-1, B-334, Moscow, 119334, Russia
| | - Jean-Baptiste Sortais
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
- Institut Universitaire de France, 1 rue Descartes, 75231, Paris Cedex 5, France
| | - Dmitry A Valyaev
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Yves Canac
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| |
Collapse
|
4
|
Ham JS, Son M, Na CG, Park B, Baik MH, Sarpong R. Construction of Seven-Membered Oxacycles Using a Rh(I)-Catalyzed Cascade C-C Formation/Cleavage of Cyclobutenol Derivatives. J Org Chem 2024; 89:4647-4656. [PMID: 38497619 DOI: 10.1021/acs.joc.3c02914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Herein, we describe the synthesis of substituted oxepane derivatives through the skeletal remodeling of 4-hydroxy-2-cyclobutenones, which are readily prepared from commercially available dialkyl squarates upon their reaction with acrylonitrile. Mechanistically, a Rh(I)-catalyzed C-C bond formation and cleavage cascade is proposed. Specifically, a fused [3.2.0] bicycle is proposed to form from dialkyl squarate-derived cyclobutenols via an unusual Rh(I)-catalyzed intermolecular oxa-Michael addition of a tertiary alcohol with acrylonitrile, followed by an intramolecular conjugate addition/migratory insertion. Subsequent C(sp3)-C(sp3) bond cleavage through a Rh-catalyzed β-carbon elimination is then theorized to furnish the oxepane scaffold. Computational studies support the formation of an intermediate [3.2.0] bicycle but also point to an alternative pathway for the formation of the oxepane products involving a Rh(III) intermediate. Additional studies have shown the overall process to be stereoretentive. The functional groups that are introduced in this process can be leveraged to form fused or bridged ring systems.
Collapse
Affiliation(s)
- Jin Su Ham
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Mina Son
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Christina G Na
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Bohyun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| |
Collapse
|
5
|
Ramspoth TF, Kootstra J, Harutyunyan SR. Unlocking the potential of metal ligand cooperation for enantioselective transformations. Chem Soc Rev 2024; 53:3216-3223. [PMID: 38381077 PMCID: PMC10985679 DOI: 10.1039/d3cs00998j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Indexed: 02/22/2024]
Abstract
Metal-ligand cooperation, in which both the metal and the ligand of a transition metal complex actively participate in chemical transformations leading to enhanced reactivity or selectivity in chemical reactions, has emerged as a powerful and versatile concept in catalysis. This Viewpoint discusses the development trajectory of transition metal-based complexes as catalysts in (de)hydrogenative processes, in particular those cases where metal-ligand cooperation has been invoked to rationalise the observed high reactivities and excellent selectivities. The historical context, mechanistic aspects and current applications are discussed with the suggestion to explore the potential of the MLC mode of action of such catalysts in enantioselective transformations beyond (de)hydrogenative processes.
Collapse
Affiliation(s)
- Tizian-Frank Ramspoth
- Institute for Chemistry, University of Groningen Institution Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
| | - Johanan Kootstra
- Institute for Chemistry, University of Groningen Institution Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
| | - Syuzanna R Harutyunyan
- Institute for Chemistry, University of Groningen Institution Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
| |
Collapse
|
6
|
Thiyagarajan S, Diskin-Posner Y, Montag M, Milstein D. Manganese-catalyzed base-free addition of saturated nitriles to unsaturated nitriles by template catalysis. Chem Sci 2024; 15:2571-2577. [PMID: 38362414 PMCID: PMC10866344 DOI: 10.1039/d3sc04935c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 01/08/2024] [Indexed: 02/17/2024] Open
Abstract
The coupling of mononitriles into dinitriles is a desirable strategy, given the prevalence of nitrile compounds and the synthetic and industrial utility of dinitriles. Herein, we present an atom-economical approach for the heteroaddition of saturated nitriles to α,β- and β,γ-unsaturated mononitriles to generate glutaronitrile derivatives using a catalyst based on earth-abundant manganese. A broad range of such saturated and unsaturated nitriles were found to undergo facile heteroaddition with excellent functional group tolerance, in a reaction that proceeds under mild and base-free conditions using low catalyst loading. Mechanistic studies showed that this unique transformation takes place through a template-type pathway involving an enamido complex intermediate, which is generated by addition of a saturated nitrile to the catalyst, and acts as a nucleophile for Michael addition to unsaturated nitriles. This work represents a new application of template catalysis for C-C bond formation.
Collapse
Affiliation(s)
- Subramanian Thiyagarajan
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science Rehovot 7610001 Israel
| | - Yael Diskin-Posner
- Department of Chemical Research Support, Weizmann Institute of Science Rehovot 7610001 Israel
| | - Michael Montag
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science Rehovot 7610001 Israel
| | - David Milstein
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science Rehovot 7610001 Israel
| |
Collapse
|
7
|
Ocampo MVL, Murray LJ. Metal-Tuned Ligand Reactivity Enables CX 2 (X = O, S) Homocoupling with Spectator Cu Centers. J Am Chem Soc 2024; 146:1019-1025. [PMID: 38165085 DOI: 10.1021/jacs.3c11928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Ligand non-innocence is ubiquitous in catalysis with ligands in synthetic complexes contributing as electron reservoirs or co-sites for substrate activation. The latter chemical non-innocence is manifested in H+ storage or relay at sites beyond the metal primary coordination sphere. Reaction of a competent CO2-to-oxalate reduction catalyst, namely, [K(THF)3](Cu3SL), where L3- is a tris(β-diketiminate) cyclophane, with CS2 affords tetrathiooxalate at long reaction times or at high CS2 concentrations, where otherwise an equilibrium is established between the starting species and a complex-CS2 adduct in which the CS2 is bound to the C atom on the ligand backbone. X-ray diffraction analysis of this adduct reveals no apparent metal participation, suggesting an entirely ligand-based reaction controlled by the charge state of the cluster. Thermodynamic parameters for the formation of the aforementioned Cligand-CS2 bond were experimentally determined, and trends with cation Lewis acidity were studied, where more acidic cations shift the equilibrium toward the adduct. Relevance of such an adduct in the reduction of CO2 to oxalate by this complex is supported by DFT studies, similar effects of countercation Lewis acidity on product formation, and the homocoupled heterocumulene product speciation as determined by isotopic labeling studies. Taken together, this system extends chemical non-innocence beyond H+ to effect catalytic transformations involving C-C bond formation and represents the rarest example of metal-ligand cooperativity, that is, spectator metal ion(s) and the ligand as the reaction center.
Collapse
Affiliation(s)
- M Victoria Lorenzo Ocampo
- Center for Catalysis, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Leslie J Murray
- Center for Catalysis, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| |
Collapse
|
8
|
Austen BJH, Clapson ML, Drover MW. Reactions of nickel boranyl compounds with pnictogen-carbon triple bonds. RSC Adv 2023; 13:19158-19163. [PMID: 37362339 PMCID: PMC10288830 DOI: 10.1039/d3ra02797j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023] Open
Abstract
The catalytic conversion of unsaturated small molecules such as nitriles into reduced products is of interest for the production of fine chemicals. In this vein, metal-ligand cooperativity has been leveraged to promote such reactivity, often conferring stability to bound substrate - a balancing act that may offer activation at the cost of turnover efficiency. This report describes the reactivity of a [(diphosphine)Ni] compound with pnictogen carbon triple bonds (R-C[triple bond, length as m-dash]E; E = N, P), where the diphosphine contains two pendant borane groups. For E = N, cooperative nitrile coordination is observed to afford {Ni}2 complexes displaying B-N interactions, whereas for E = P, B-P interactions are absent. This work additionally outlines a structure-activity relationship that uses nitrile dihydroboration as a model reaction to unveil the effect of SCS stabilization, employing [(diphosphine)Ni] where the diphosphine contains 0, 1, or 2 pendant Lewis acid groups.
Collapse
Affiliation(s)
- Brady J H Austen
- Department of Chemistry and Biochemistry, The University of Windsor 401 Sunset Avenue Windsor ON N9B 3P4 Canada
| | - Marissa L Clapson
- Department of Chemistry and Biochemistry, The University of Windsor 401 Sunset Avenue Windsor ON N9B 3P4 Canada
| | - Marcus W Drover
- Department of Chemistry and Biochemistry, The University of Windsor 401 Sunset Avenue Windsor ON N9B 3P4 Canada
| |
Collapse
|
9
|
Stichauer R, Duvinage D, Langer R, Vogt M. Manganese(I) Tricarbonyl Complexes with Bidentate Pyridine-Based Actor Ligands: Reversible Binding of CO 2 and Benzaldehyde via Cooperative C–C and Mn–O Bond Formation at Ambient Temperature. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rasmus Stichauer
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Str. NW2, 28359 Bremen, Germany
| | - Daniel Duvinage
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Str. NW2, 28359 Bremen, Germany
| | - Robert Langer
- Institut für Chemie, Naturwissenschaftliche Fakultät II, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| | - Matthias Vogt
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Str. NW2, 28359 Bremen, Germany
- Institut für Chemie, Naturwissenschaftliche Fakultät II, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| |
Collapse
|
10
|
Xie M, Sun X, Li W, Guan J, Liang Z, Hu Y. A Facile Route for the Formation of Complex Nitrogen-Containing Prebiotic Molecules in the Interstellar Medium. J Phys Chem Lett 2022; 13:8207-8213. [PMID: 36006401 DOI: 10.1021/acs.jpclett.2c01857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Prebiotic molecules have often been identified in the interstellar medium and meteorite samples. However, we still have only a fragmentary knowledge of the mechanism of the evolutionary process of these prebiotic molecules. With the aid of state-of-the-art vacuum ultraviolet (VUV)-infrared (IR) spectroscopy and ab initio calculations, we reveal a new pathway leading to the formation of the biorelevant molecules carrying amine groups or peptide bonds via the single-photon ionization induced Michael/cyclization reaction of acrylonitrile (AN)-alcohol heterodimer complexes in the gas phase. In the reactions, not only N-H nitrilium cations with H+-N≡C-R Lewis structure but also cyclic amine cations with a peptide bond can be formed when the AN reacts with alcohols of increasing molecular size (such as ethanol, propanol, or butanol). This study suggests the possibility of unsaturated nitriles being reduced by ionized alcohols in space, which can further drive sequential Michael addition/cyclization reactions to form more complex biorelevant molecules.
Collapse
Affiliation(s)
- Min Xie
- MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Xiaonan Sun
- MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Weixing Li
- Department of Chemistry, Fudan University, Songhu Rd. 2005, 200438 Shanghai, China
| | - Jiwen Guan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Zhenhao Liang
- MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| |
Collapse
|
11
|
Hermosilla P, García-Orduña P, Sanz Miguel PJ, Polo V, Casado MA. Nucleophilic Reactivity at a ═CH Arm of a Lutidine-Based CNC/Rh System: Unusual Alkyne and CO 2 Activation. Inorg Chem 2022; 61:7120-7129. [PMID: 35476902 PMCID: PMC9994788 DOI: 10.1021/acs.inorgchem.2c00617] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Reaction of an amido pincer complex [(CNC)*Rh(CO)] (1) (CNC* is the deprotonated form of CNC) with carbon dioxide gave a neutral complex [(CNC-CO2)Mes*Rh(CO)] (2), which is the result of a C-C bond-forming reaction between the deprotonated arm of the CNC* ligand and CO2. The molecular structure of 2 showed a zwitterionic complex, where the CO2 moiety is covalently connected to the former ═CH arm of the CNC* pincer ligand. The unusual structure of 1 allowed us to explore the reactivity of the CO2 moiety with selected primary amines RNH2 (benzylamine and ammonia), which afforded cationic complexes [(CNC)MesRh(CO)][HRNC(O)O] (R = Bz (3), H (4)). Compounds 3 and 4 are the result of a C-N coupling between the incoming amine and the CO2 fragment covalently connected to the pincer ligand in 2, a process that involves protonation of the "CH-CO2" fragment in 2 from the respective amines. Once revealed the nucleophilic character of the ═CH fragment in 1, we explored its reactivity with alkynes, a study that enlightened a novel reactivity trend in alkyne activation. Reaction of 1 with terminal alkynes RC≡CH (R = Ph, 2-py, 4-C6H4-CF3) yielded neutral complexes [(CNC-CH═CHR)Mes*Rh(CO)] (R = Ph (5), 2-py (6), 4-C6H4-CF3 (7)) in good yields. Deuterium labeling experiments with PhC≡CD confirmed that complex 5 is the product of a formal insertion of the alkyne into the C(sp2)-H bond of the deprotonated arm in 1. This structural proposal was further confirmed by the X-ray molecular structure of phenyl complex 5, which showed the alkyne covalently linked to the pincer ligand. Besides, this novel transformation was analyzed by DFT methods and showed a metal-ligand cooperative mechanism, based on the initial electrophilic attack of the alkyne to the ═CH arm of the CNCMes* ligand (making a new C-C bond) followed by the action of a protic base (HN(SiMe3)2), which is able to perform a proton rearrangement that leads to the final product 5.
Collapse
Affiliation(s)
- Pablo Hermosilla
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Pilar García-Orduña
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Pablo J Sanz Miguel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Víctor Polo
- Departamento de Química Física and Instituto de Biocomputación y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Miguel A Casado
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| |
Collapse
|
12
|
Wang M, Chen C, Ma M, Zhao B, Shi Z. Photoinduced Etherification of Less-Strained Cycloketoxime Esters Enabled by C–C Bond Cleavage. J Org Chem 2022; 87:3577-3585. [DOI: 10.1021/acs.joc.1c03131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Mengning Wang
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Cheng Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Mengtao Ma
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Binlin Zhao
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| |
Collapse
|
13
|
Khera M, Goel N. Cooperative Effect of Noncovalent Interactions on Tetrel Bonding in Halogenated Silanes. Chemphyschem 2022; 23:e202100776. [PMID: 35014137 DOI: 10.1002/cphc.202100776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/09/2022] [Indexed: 11/06/2022]
Abstract
Tetrel bond, a weak noncovalent interaction between the σ -hole of a Group IV element (Silicon in our case) and the cloud of an electronegative element (Oxygen in our case) is the focus of current work. The percentage strengthening of tetrel bond has been investigated by optimising 16 binary complexes of halogenated silane and water of general formula SiX n H 4 - n - H 2 O and 16 ternary complexes, of general formula NaX - SiX n H 4 - n -H 2 O, where X =F, Cl, Br and I and n = 1, 2, 3 and 4 at various levels of theory defined within the formalism of density functional theory (DFT). With the addition of NaX, tetrel bond between Si and O in SiX n H 4 - n - H 2 O gets strengthened up to 49%, owing to cooperativity effect exerted by hydrogen bonding between X and H in the ternary complex NaX - SiX n H 4 - n - H 2 O. In the series of complexes studied here, overall stabilization due to cooperativity lies between 10 kJ/mol to 170 kJ/mol. This large extent of reinforcement due to cooperativity has never been showcased before. The exceptional stabilization and reinforcement owe its genesis to the transformation of the ternary complex into a cluster orchestrated by the H-bonding in most of the cases and covalent bonding in few of the cases.
Collapse
Affiliation(s)
- Mayank Khera
- Punjab University: Panjab University, Chemistry, INDIA
| | - Neetu Goel
- Panjab University, Department of Chemistry, Sector 14, 160014, chandigarh, INDIA
| |
Collapse
|
14
|
Guo B, Vries JG, Otten E. Selective α‐Deuteration of Cinnamonitriles using D
2
O as Deuterium Source. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Beibei Guo
- Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Johannes G. Vries
- Leibniz Institute für Katalyse e. V. Albert-Einstein-Strasse 29a 18059 Rostock Germany
| | - Edwin Otten
- Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| |
Collapse
|
15
|
Deolka S, Fayzullin RR, Khaskin E. Bulky PNP ligands blocking metal-ligand cooperation allow for isolation of Ru(0), and lead to catalytically active Ru complexes in acceptorless alcohol dehydrogenation. Chemistry 2021; 28:e202103778. [PMID: 34741487 DOI: 10.1002/chem.202103778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Indexed: 11/12/2022]
Abstract
We synthesized two 4Me-PNP ligands which block metal-ligand cooperation (MLC) with the Ru center and compared their Ru complex chemistry to their two traditional analogues used in acceptorless alcohol dehydrogenation catalysis. The corresponding 4Me-PNP complexes, which do not undergo dearomatization upon addition of base, allowed us to obtain rare, albeit unstable, 16 electron mono CO Ru(0) complexes. Reactivity with CO and H 2 allows for stabilization and extensive characterization of bis CO Ru(0) 18 electron and Ru(II) cis and trans dihydride species that were also shown to be capable of C(sp2)-H activation. Reactivity and catalysis are contrasted to non-methylated Ru(II) species, showing that an MLC pathway is not necessary, with dramatic differences in outcomes during catalysis between i Pr and t Bu PNP complexes within each of the 4Me and non-methylated backbone PNP series being observed. Unusual intermediates are characterized in one of the new and one of the traditional complexes, and a common catalysis deactivation pathway was identified.
Collapse
Affiliation(s)
- Shubham Deolka
- Okinawa Institute of Science and Technology Graduate University, Chemistry, JAPAN
| | - Robert R Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center of Russian Academy of Sciences: Institut organicheskoj i fizicheskoj khimii imeni A E Arbuzova KazNC RAN, Organic and Physical Chemistry, RUSSIAN FEDERATION
| | - Eugene Khaskin
- Okinawa Institute of Science and Technology Graduate University, Chemistry, 1919-1 Tancha, 904-0495, Onna, JAPAN
| |
Collapse
|
16
|
Zhou QQ, Zou YQ, Kar S, Diskin-Posner Y, Ben-David Y, Milstein D. Manganese-Pincer-Catalyzed Nitrile Hydration, α-Deuteration, and α-Deuterated Amide Formation via Metal Ligand Cooperation. ACS Catal 2021; 11:10239-10245. [PMID: 34476112 PMCID: PMC8383274 DOI: 10.1021/acscatal.1c01748] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 07/27/2021] [Indexed: 01/07/2023]
Abstract
![]()
A simple and efficient
system for the hydration and α-deuteration
of nitriles to form amides, α-deuterated nitriles, and α-deuterated
amides catalyzed by a single pincer complex of the earth-abundant
manganese capable of metal–ligand cooperation is reported.
The reaction is selective and tolerates a wide range of functional
groups, giving the corresponding amides in moderate to good yields.
Changing the solvent from tert-butanol to toluene
and using D2O results in formation of α-deuterated
nitriles in high selectivity. Moreover, α-deuterated amides
can be obtained in one step directly from nitriles and D2O in THF. Preliminary mechanistic studies suggest the transformations
contributing toward activation of the nitriles via a metal–ligand
cooperative pathway, generating the manganese ketimido and enamido
pincer complexes as the key intermediates for further transformations.
Collapse
|
17
|
Hernández‐Juárez M, Sánchez P, López‐Serrano J, Lara P, González‐Herrero P, Rendón N, Álvarez E, Paneque M, Suárez A. Metalated Ir–CNP Complexes Containing Imidazolin‐2‐ylidene and Imidazolidin‐2‐ylidene Donors – Synthesis, Structure, Luminescence, and Metal–Ligand Cooperative Reactivity. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000681] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Martín Hernández‐Juárez
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
- Área Académica de Química Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo (UAEH) Km. 14.5 Carretera Pachuca‐Tulancingo, Ciudad del Conocimiento, C.P. 42184 Mineral de la Reforma Hidalgo Mexico
| | - Práxedes Sánchez
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| | - Joaquín López‐Serrano
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| | - Patricia Lara
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| | - Pablo González‐Herrero
- Departamento de Química Inorgánica Facultad de Química Universidad de Murcia 30071 Murcia Spain
| | - Nuria Rendón
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| | - Margarita Paneque
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| | - Andrés Suárez
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO‐CINQA) CSIC and Universidad de Sevilla 41092 Sevilla Spain
| |
Collapse
|
18
|
Spielvogel KD, Luna JA, Loria SM, Weisburn LP, Stumme NC, Ringenberg MR, Durgaprasad G, Keith JM, Shaw SK, Daly SR. Influence of Multisite Metal-Ligand Cooperativity on the Redox Activity of Noninnocent N 2S 2 Ligands. Inorg Chem 2020; 59:10845-10853. [PMID: 32639726 DOI: 10.1021/acs.inorgchem.0c01353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Metal-ligand cooperativity (MLC) relies on chemically reactive ligands to assist metals with small-molecule binding and activation, and it has facilitated unprecedented examples of catalysis with metal complexes. Despite growing interest in combining ligand-centered chemical and redox reactions for chemical transformations, there are few studies demonstrating how chemically engaging redox active ligands in MLC affects their electrochemical properties when bound to metals. Here we report stepwise changes in the redox activity of model Ru complexes as zero, one, and two BH3 molecules undergo MLC binding with a triaryl noninnocent N2S2 ligand derived from o-phenylenediamine (L1). A similar series of Ru complexes with a diaryl N2S2 ligand with ethylene substituted in place of phenylene (L2) is also described to evaluate the influence of the o-phenylenediamine subunit on redox activity and MLC. Cyclic voltammetry (CV) studies and density functional theory (DFT) calculations show that MLC attenuates ligand-centered redox activity in both series of complexes, but electron transfer is still achieved when only one of the two redox-active sites on the ligands is chemically engaged. The results demonstrate how incorporating more than one multifunctional reactive site could be an effective strategy for maintaining redox noninnocence in ligands that are also chemically reactive and competent for MLC.
Collapse
Affiliation(s)
- Kyle D Spielvogel
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Javier A Luna
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Sydney M Loria
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Leah P Weisburn
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Nathan C Stumme
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Mark R Ringenberg
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Gummadi Durgaprasad
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Jason M Keith
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Scott K Shaw
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Scott R Daly
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| |
Collapse
|
19
|
Recent Advances in Homogeneous Catalysis via Metal–Ligand Cooperation Involving Aromatization and Dearomatization. Catalysts 2020. [DOI: 10.3390/catal10060635] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Recently, an increasing number of metal complex catalysts have been developed to achieve the activation or transformation of substrates based on cooperation between the metal atom and its ligands. In such “cooperative catalysis,” the ligand not only is bound to the metal, where it exerts steric and electronic effects, but also functionally varies its structure during the elementary processes of the catalytic reaction. In this review article, we focus on metal–ligand cooperation involving aromatization and dearomatization of the ligand, thus introducing the newest developments and examples of homogeneous catalytic reactions.
Collapse
|
20
|
Bootsma J, Guo B, de Vries JG, Otten E. Ruthenium Complexes with PNN Pincer Ligands Based on (Chiral) Pyrrolidines: Synthesis, Structure, and Dynamic Stereochemistry. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Johan Bootsma
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Beibei Guo
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Johannes G. de Vries
- Leibniz Institute für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Edwin Otten
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| |
Collapse
|
21
|
Thiyagarajan S, Krishnakumar V, Gunanathan C. KOtBu-Catalyzed Michael Addition Reactions Under Mild and Solvent-Free Conditions. Chem Asian J 2020; 15:518-523. [PMID: 31957937 DOI: 10.1002/asia.201901647] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/29/2019] [Indexed: 11/10/2022]
Abstract
Designed transition metal complexes predominantly catalyze Michael addition reactions. Inorganic and organic base-catalyzed Michael addition reactions have been reported. However, known base-catalyzed reactions suffer from the requirement of solvents, additives, high pressure and also side-reactions. Herein, we demonstrate a mild and environmentally friendly strategy of readily available KOt Bu-catalyzed Michael addition reactions. This simple inorganic base efficiently catalyzes the Michael addition of underexplored acrylonitriles, esters and amides with (oxa-, aza-, and thia-) heteroatom nucleophiles. This catalytic process proceeds under solvent-free conditions and at room temperature. Notably, this protocol offers an easy operational procedure, broad substrate scope with excellent selectivity, reaction scalability and excellent TON (>9900). Preliminary mechanistic studies revealed that the reaction follows an ionic mechanism. Formal synthesis of promazine is demonstrated using this catalytic protocol.
Collapse
Affiliation(s)
- Subramanian Thiyagarajan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, 752050, India
| | - Varadhan Krishnakumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, 752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, 752050, India
| |
Collapse
|
22
|
Catalytic Conversion of Nitriles by Metal Pincer Complexes. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
23
|
Tang S, Milstein D. Template catalysis by manganese pincer complexes: oxa- and aza-Michael additions to unsaturated nitriles. Chem Sci 2019; 10:8990-8994. [PMID: 31762979 PMCID: PMC6855260 DOI: 10.1039/c9sc03269j] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/07/2019] [Indexed: 12/19/2022] Open
Abstract
Activation of C[triple bond, length as m-dash]N bonds by metal-ligand cooperation provides a new route for the functionalization of nitriles. Herein, we report the electrophilic activation of unsaturated nitriles by dearomatized manganese pincer complexes for the oxa- and aza-Michael addition reactions under very mild and neutral conditions. Derivatives of acrylonitrile and allyl cyanide furnished the corresponding β-addition products by reacting with alcohols and amines. Mechanistically, the catalysis is mostly ligand based. Reaction of the dearomatized PNN-Mn complex with 2-pentenenitrile or 3-pentenenitrile furnished an enamido-Mn complex. The equilibrium between an enamido complex and a ketimido complex, and reversible C-C bond formation with the ligand are proposed to play central roles in the catalysis.
Collapse
Affiliation(s)
- Shan Tang
- Department of Organic Chemistry , The Weizmann Institute of Science , Rehovot 76100 , Israel .
| | - David Milstein
- Department of Organic Chemistry , The Weizmann Institute of Science , Rehovot 76100 , Israel .
| |
Collapse
|
24
|
He T, Buttner JC, Reynolds EF, Pham J, Malek JC, Keith JM, Chianese AR. Dehydroalkylative Activation of CNN- and PNN-Pincer Ruthenium Catalysts for Ester Hydrogenation. J Am Chem Soc 2019; 141:17404-17413. [PMID: 31589441 DOI: 10.1021/jacs.9b09326] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Ruthenium-pincer complexes bearing CNN- and PNN-pincer ligands with diethyl- or diisopropylamino side groups, which have previously been reported to be active precatalysts for ester hydrogenation, undergo dehydroalkylation on heating in the presence of tricyclohexylphosphine to release ethane or propane, giving five-coordinate ruthenium(0) complexes containing a nascent imine functional group. Ethane or propane is also released under the conditions of catalytic ester hydrogenation, and time-course studies show that this release is concomitant with the onset of catalysis. A new PNN-pincer ruthenium(0)-imine complex is a highly active catalyst for ester hydrogenation at room temperature, giving up to 15 500 turnovers with no added base. This complex was shown to react reversibly at room temperature with two equivalents of hydrogen to give a ruthenium(II)-dihydride complex, where the imine functionality has been hydrogenated to give a protic amine side group. These observations have potentially broad implications for the identities of catalytic intermediates in ester hydrogenation and related transformations.
Collapse
Affiliation(s)
- Tianyi He
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - John C Buttner
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Eamon F Reynolds
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - John Pham
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Jack C Malek
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Jason M Keith
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Anthony R Chianese
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| |
Collapse
|
25
|
Guo B, de Vries JG, Otten E. Hydration of nitriles using a metal-ligand cooperative ruthenium pincer catalyst. Chem Sci 2019; 10:10647-10652. [PMID: 32110350 PMCID: PMC7020783 DOI: 10.1039/c9sc04624k] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/04/2019] [Indexed: 12/21/2022] Open
Abstract
The hydration of a broad range of aliphatic and (hetero)aromatic nitriles is reported via catalysis by metal–ligand cooperative Ru pincer complexes under very mild conditions.
Nitrile hydration provides access to amides that are important structural elements in organic chemistry. Here we report catalytic nitrile hydration using ruthenium catalysts based on a pincer scaffold with a dearomatized pyridine backbone. These complexes catalyze the nucleophilic addition of H2O to a wide variety of aliphatic and (hetero)aromatic nitriles in tBuOH as solvent. Reactions occur under mild conditions (room temperature) in the absence of additives. A mechanism for nitrile hydration is proposed that is initiated by metal–ligand cooperative binding of the nitrile.
Collapse
Affiliation(s)
- Beibei Guo
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
| | - Johannes G de Vries
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock , Albert-Einstein-Strasse 29a , 18059 Rostock , Germany
| | - Edwin Otten
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
| |
Collapse
|
26
|
Borghs JC, Tran MA, Sklyaruk J, Rueping M, El-Sepelgy O. Sustainable Alkylation of Nitriles with Alcohols by Manganese Catalysis. J Org Chem 2019; 84:7927-7935. [DOI: 10.1021/acs.joc.9b00792] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jannik C. Borghs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Mai Anh Tran
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Jan Sklyaruk
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Osama El-Sepelgy
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| |
Collapse
|
27
|
Buhaibeh R, Filippov OA, Bruneau‐Voisine A, Willot J, Duhayon C, Valyaev DA, Lugan N, Canac Y, Sortais J. Phosphine‐NHC Manganese Hydrogenation Catalyst Exhibiting a Non‐Classical Metal‐Ligand Cooperative H
2
Activation Mode. Angew Chem Int Ed Engl 2019; 58:6727-6731. [DOI: 10.1002/anie.201901169] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/26/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Ruqaya Buhaibeh
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)Russian Academy of Sciences 28 Vavilov str., GSP-1, B-334 Moscow 119991 Russia
| | - Antoine Bruneau‐Voisine
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
- Univ RennesCNRS, ISCR—UMR 6226 35000 Rennes France
| | - Jérémy Willot
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Carine Duhayon
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Dmitry A. Valyaev
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Noël Lugan
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Yves Canac
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Jean‐Baptiste Sortais
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
- Institut Universitaire de France 1 rue Descartes 75231 Paris Cedex 05 France
| |
Collapse
|
28
|
Buhaibeh R, Filippov OA, Bruneau‐Voisine A, Willot J, Duhayon C, Valyaev DA, Lugan N, Canac Y, Sortais J. Phosphine‐NHC Manganese Hydrogenation Catalyst Exhibiting a Non‐Classical Metal‐Ligand Cooperative H
2
Activation Mode. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901169] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ruqaya Buhaibeh
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)Russian Academy of Sciences 28 Vavilov str., GSP-1, B-334 Moscow 119991 Russia
| | - Antoine Bruneau‐Voisine
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
- Univ RennesCNRS, ISCR—UMR 6226 35000 Rennes France
| | - Jérémy Willot
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Carine Duhayon
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Dmitry A. Valyaev
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Noël Lugan
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Yves Canac
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
| | - Jean‐Baptiste Sortais
- LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
- Institut Universitaire de France 1 rue Descartes 75231 Paris Cedex 05 France
| |
Collapse
|
29
|
Devillard M, Ehlers A, Siegler MA, van der Vlugt JI. Selective Carbanion-Pyridine Coordination of a Reactive P,N Ligand to Rh I. Chemistry 2019; 25:3875-3883. [PMID: 30600857 PMCID: PMC6519283 DOI: 10.1002/chem.201805504] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/12/2018] [Indexed: 01/12/2023]
Abstract
Ligands with reactive carbon sites in the periphery of a metal center have emerged as a powerful approach for metal-ligand bond activation. These reactive carbon sites are commonly generated by deprotonation strategies. Carbon-silicon bond cleavage is a potential alternative to access such constructs. Herein, the monodesilylation of bis-silyl-substituted P,N scaffold PNSi2 in the coordination sphere of [RhI (Cl)(CO)(PNSi2 )] (1) with sodium azide is disclosed. This affords a unique dinucleating anionic κ2 -C,N-κ1 -P ligand with a carbanionic methine carbon atom directly bound to rhodium as part of a four-membered Rh-N-C-C rhodacycle. This dimer undergoes meta-pyridine C-H activation facilitated by weak bases, which leads to a desymmetrization of the system and provides a σ,π-bridging 3-pyridyl fragment bound to RhI . The facile Si-C cleavage strategy may pave the way to studying the reactivity and functionalization of a variety of κ2 -C,N-coordinated pyridine scaffolds for selective transformations.
Collapse
Affiliation(s)
- Marc Devillard
- van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Andreas Ehlers
- van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
- Department of ChemistryUniversity of Johannesburg, P.O. Box 254Auckland ParkJohannesburgSouth Africa
| | - Maxime A. Siegler
- Department of ChemistryJohns Hopkins University3400 N Charles StreetBaltimoreMD21218USA
| | - Jarl Ivar van der Vlugt
- van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| |
Collapse
|
30
|
Guo B, Zijlstra DS, de Vries JG, Otten E. Oxa-Michael Addition to α,β-Unsaturated Nitriles: An Expedient Route to γ-Amino Alcohols and Derivatives. ChemCatChem 2018; 10:2868-2872. [PMID: 30263082 PMCID: PMC6147005 DOI: 10.1002/cctc.201800509] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Indexed: 11/10/2022]
Abstract
Water addition to α,β-unsaturated nitriles would give facile access to the β-hydroxy-nitriles, which in turn can be hydrogenated to the γ-amino alcohols. We have previously shown that alcohols readily add in 1,4-fashion to these substrates using Milstein's Ru(PNN) pincer complex as catalyst. However, attempted water addition to α,β-unsaturated nitriles gave the 3-hydroxynitriles in mediocre yields. On the other hand, addition of benzyl alcohol proceeded in excellent yields for a variety of β-substituted unsaturated nitriles. Subsequent treatment of the benzyl alcohol addition products with TMSCl/FeCl3 resulted in the formation of 3-hydroxy-alkylnitriles. The 3-benzyloxy-alkylnitriles obtained from oxa-Michael addition also could be hydrogenated directly in the presence of acid to give the amino alcohols as their HCl salts in excellent yields. Hydrogenation under neutral conditions gave a mixture of the secondary and tertiary amines. Hydrogenation in the presence of base and Boc-anhydride gave the orthogonally bis-protected amino alcohols, in which the benzyl ether can subsequently be cleaved to yield Boc-protected amino alcohols. Thus, a variety of molecular scaffolds with a 1,3-relationship between O- and N-functional group is accessible starting from oxa-Michael addition of benzyl alcohol to α,β-unsaturated nitriles.
Collapse
Affiliation(s)
- Beibei Guo
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenThe Netherlands
| | - Douwe S. Zijlstra
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenThe Netherlands
| | - Johannes G. de Vries
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenThe Netherlands
- Leibniz Institute für Katalyse e. V. an derUniversität RostockAlbert-Einstein-Strasse 29a18059RostockGermany
| | - Edwin Otten
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenThe Netherlands
| |
Collapse
|
31
|
Valdés H, García-Eleno MA, Canseco-Gonzalez D, Morales-Morales D. Recent Advances in Catalysis with Transition-Metal Pincer Compounds. ChemCatChem 2018. [DOI: 10.1002/cctc.201702019] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Hugo Valdés
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior s/n, Ciudad Universitaria, Coyoacán 04510 Ciudad de México México
| | - Marco A. García-Eleno
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM; Universidad Autónoma del Estado de México; Carretera Toluca-Atlacomulco Km 14.5 Toluca, Estado de México 50200 México
| | - Daniel Canseco-Gonzalez
- CONACYT-Laboratorio Nacional de Investigación y Servicio, Agroalimentario y Forestal; Universidad Autónoma Chapingo; Texcoco de Mora México
| | - David Morales-Morales
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior s/n, Ciudad Universitaria, Coyoacán 04510 Ciudad de México México
| |
Collapse
|
32
|
Eijsink LE, Perdriau SCP, de Vries JG, Otten E. Metal-ligand cooperative activation of nitriles by a ruthenium complex with a de-aromatized PNN pincer ligand. Dalton Trans 2018; 45:16033-16039. [PMID: 27727356 DOI: 10.1039/c6dt02478e] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The pincer complex (PNN)RuH(CO), with a de-aromatized pyridine in the ligand backbone, is shown to react with nitriles in a metal-ligand cooperative manner. This leads to the formation of a series of complexes with new Ru-N(nitrile) and C(ligand)-C(nitrile) bonds. The initial nitrile cycloaddition products, the ketimido complexes 3, have a Brønsted basic (nitrile-derived) Ru-N fragment. This is able to deprotonate a CH2 side-arm of the pincer ligand to give ketimine complexes (4) with a de-aromatized pyridine backbone. Alternatively, the presence of a CH2 group adjacent to the nitrile functionality can lead to tautomerization to an enamido complex (5). Variable-temperature NMR studies and DFT calculations provide insight in the relative stability of these compounds and highlight the importance of their facile interconversion in the context of subsequent nitrile transformations.
Collapse
Affiliation(s)
- Linda E Eijsink
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| | - Sébastien C P Perdriau
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| | - Johannes G de Vries
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands. and Leibniz-Institut für Katalyse an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Edwin Otten
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| |
Collapse
|
33
|
Devillard M, Alvarez Lamsfus C, Vreeken V, Maron L, van der Vlugt JI. Versatile coordination of a reactive P,N-ligand toward boron, aluminum and gallium and interconversion reactivity. Dalton Trans 2018; 45:10989-98. [PMID: 27306040 DOI: 10.1039/c6dt02087a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The synthesis and reactivity of the first Group 13 complexes bearing a dearomatized phosphino-amido ligand are reported, i.e. alane AlEt2(L) , gallane GaCl2(L) and borane B(Cl)(Ph)(L) . The three complexes react very differently with Group 13 trihalogenides, providing access to zwitterionic anti-·GaCl3 and the unique bis(metalloid) ·BCl2, with the boron center part of a highly unusual anionic four-membered ring (charge on C) and Ga bound to P. The coordination chemistry and the various transformations are supported by DFT calculations, X-ray crystallography and multinuclear NMR spectroscopic data.
Collapse
Affiliation(s)
- M Devillard
- Homogeneous, Bioinspired and Supramolecular, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
| | - C Alvarez Lamsfus
- Laboratoire de Physique et Chimie des Nanoobjets, Université de Toulouse, INSA-UPS-CNRS (UMR 5215) 135, avenue de Rangueil, 31077 Toulouse cedex 4, France
| | - V Vreeken
- Homogeneous, Bioinspired and Supramolecular, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
| | - L Maron
- Laboratoire de Physique et Chimie des Nanoobjets, Université de Toulouse, INSA-UPS-CNRS (UMR 5215) 135, avenue de Rangueil, 31077 Toulouse cedex 4, France
| | - J I van der Vlugt
- Homogeneous, Bioinspired and Supramolecular, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
| |
Collapse
|
34
|
Dong K, Sang R, Fang X, Franke R, Spannenberg A, Neumann H, Jackstell R, Beller M. Efficient Palladium-Catalyzed Alkoxycarbonylation of Bulk Industrial Olefins Using Ferrocenyl Phosphine Ligands. Angew Chem Int Ed Engl 2017; 56:5267-5271. [DOI: 10.1002/anie.201700317] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Kaiwu Dong
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Rui Sang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Xianjie Fang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Robert Franke
- Evonik Performance Materials GmbH; Paul-Baumann-Strasse 1 45772 Marl Germany
- Lehrstuhl für Theoretische Chemie; Ruhr-Universität Bochum; 44780 Bochum Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Helfried Neumann
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Ralf Jackstell
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| |
Collapse
|
35
|
Dong K, Sang R, Fang X, Franke R, Spannenberg A, Neumann H, Jackstell R, Beller M. Efficient Palladium-Catalyzed Alkoxycarbonylation of Bulk Industrial Olefins Using Ferrocenyl Phosphine Ligands. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700317] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kaiwu Dong
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Rui Sang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Xianjie Fang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Robert Franke
- Evonik Performance Materials GmbH; Paul-Baumann-Strasse 1 45772 Marl Germany
- Lehrstuhl für Theoretische Chemie; Ruhr-Universität Bochum; 44780 Bochum Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Helfried Neumann
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Ralf Jackstell
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| |
Collapse
|
36
|
Mukherjee A, Srimani D, Ben-David Y, Milstein D. Low-Pressure Hydrogenation of Nitriles to Primary Amines Catalyzed by Ruthenium Pincer Complexes. Scope and mechanism. ChemCatChem 2017. [DOI: 10.1002/cctc.201601416] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Arup Mukherjee
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 76100 Israel
| | - Dipankar Srimani
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 76100 Israel
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Yehoshoa Ben-David
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 76100 Israel
| | - David Milstein
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 76100 Israel
| |
Collapse
|
37
|
Zhong LR, Yao ZJ. Michael addition-based cyclization strategy in the total synthesis of Lycopodium alkaloids. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0056-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
38
|
Bhunya S, Roy L, Paul A. Mechanistic Details of Ru–Bis(pyridyl)borate Complex Catalyzed Dehydrogenation of Ammonia–Borane: Role of the Pendant Boron Ligand in Catalysis. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02616] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sourav Bhunya
- Raman Centre for Atomic,
Molecular and Optical Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Lisa Roy
- Raman Centre for Atomic,
Molecular and Optical Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Ankan Paul
- Raman Centre for Atomic,
Molecular and Optical Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| |
Collapse
|
39
|
Nerush A, Vogt M, Gellrich U, Leitus G, Ben-David Y, Milstein D. Template Catalysis by Metal–Ligand Cooperation. C–C Bond Formation via Conjugate Addition of Non-activated Nitriles under Mild, Base-free Conditions Catalyzed by a Manganese Pincer Complex. J Am Chem Soc 2016; 138:6985-97. [DOI: 10.1021/jacs.5b13208] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | - Matthias Vogt
- Institut
für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße, 28359 Bremen, Germany
| | | | | | | | | |
Collapse
|
40
|
Affiliation(s)
- A. Subha Mahadevi
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
| | - G. Narahari Sastry
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
| |
Collapse
|
41
|
Tay WS, Yang XY, Li Y, Pullarkat SA, Leung PH. Efficient and stereoselective synthesis of monomeric and bimetallic pincer complexes containing Pd-bonded stereogenic carbons. RSC Adv 2016. [DOI: 10.1039/c6ra16721g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Optically-pure aliphatic N–C(sp3)–E Pd pincer complexes with C-stereogenic centers were synthesized via stepwise (1) enantioselective catalytic hydrophosphination, (2) P(iii) → P(v) oxidation and (3) diastereoselective C(sp3)–H activation.
Collapse
Affiliation(s)
- Wee Shan Tay
- Division of Chemistry & Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Xiang-Yuan Yang
- Division of Chemistry & Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Sumod A. Pullarkat
- Division of Chemistry & Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Pak-Hing Leung
- Division of Chemistry & Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| |
Collapse
|
42
|
Yempally V, Fan WY, Arndtsen BA, Bengali AA. Intramolecular C-C Bond Coupling of Nitriles to a Diimine Ligand in Group 7 Metal Tricarbonyl Complexes. Inorg Chem 2015; 54:11441-9. [PMID: 26554575 DOI: 10.1021/acs.inorgchem.5b02087] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dissolution of M(CO)3(Br)(L(Ar)) [L(Ar) = (2,6-Cl2-C6H3-NCMe)2CH2] in either acetonitrile [M = Mn, Re] or benzonitrile (M = Re) results in C-C coupling of the nitrile to the diimine ligand. When reacted with acetonitrile, the intermediate adduct [M(CO)3(NCCH3)(L(Ar))]Br forms and undergoes an intramolecular C-C coupling reaction between the nitrile carbon and the methylene carbon of the β-diimine ligand.
Collapse
Affiliation(s)
- Veeranna Yempally
- Department of Chemistry, Texas A&M University at Qatar , Doha, Qatar
| | - Wai Yip Fan
- Department of Chemistry, National University of Singapore , 3 Science Drive, Singapore 119077
| | - Bruce A Arndtsen
- Department of Chemistry, McGill University , 801 Sherbrooke St. W., Montreal, Quebec, H3A 0B8, Canada
| | - Ashfaq A Bengali
- Department of Chemistry, Texas A&M University at Qatar , Doha, Qatar
| |
Collapse
|
43
|
|
44
|
Khusnutdinova JR, Milstein D. Metal-Ligand Cooperation. Angew Chem Int Ed Engl 2015; 54:12236-73. [DOI: 10.1002/anie.201503873] [Citation(s) in RCA: 783] [Impact Index Per Article: 87.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Indexed: 12/25/2022]
|
45
|
Tang Z, Otten E, Reek JNH, van der Vlugt JI, de Bruin B. Dynamic Ligand Reactivity in a Rhodium Pincer Complex. Chemistry 2015. [DOI: 10.1002/chem.201501453] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|