1
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Singh J, Sharma S, Prakasham AP, Rajaraman G, Ghosh P. Accessing Bioactive Hydrazones by the Hydrohydrazination of Terminal Alkynes Catalyzed by Gold(I) Acyclic Aminooxy Carbene Complexes and Their Gold(I) Arylthiolato and Gold(III) Tribromo Derivatives: A Combined Experimental and Computational Study. ACS OMEGA 2023; 8:21042-21073. [PMID: 37323414 PMCID: PMC10268297 DOI: 10.1021/acsomega.3c01925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/05/2023] [Indexed: 06/17/2023]
Abstract
Hydrohydrazination of terminal alkynes with hydrazides yielding hydrazones 5-14 were successfully catalyzed by a series of gold(I) acyclic aminooxy carbene complexes of the type [{(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)}methylidene]AuCl, where R2 = H, R1 = Me (1b); R2 = H, R1 = Cy (2b); R2 = t-Bu, R1 = Me (3b); R2 = t-Bu, R1 = Cy (4b). The mass spectrometric evidence corroborated the existence of the catalytically active solvent-coordinated [(AAOC)Au(CH3CN)]SbF6 (1-4)A species and the acetylene-bound [(AAOC)Au(HC≡CPhMe)]SbF6 (3B) species of the proposed catalysis cycle. The hydrohydrazination reaction was successfully employed in synthesizing several bioactive hydrazone compounds (15-18) with anticonvulsant properties using a representative precatalyst (2b). The DFT studies favored the 4-ethynyltoluene (HC≡CPhMe) coordination pathway over the p-toluenesulfonyl hydrazide (NH2NHSO2C6H4CH3) coordination pathway, and that proceeded by a crucial intermolecular hydrazide-assisted proton transfer step. The gold(I) complexes (1-4)b were synthesized from the {[(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)]CH}+OTf- (1-4)a by treatment with (Me2S)AuCl in the presence of NaH as a base. The reactivity studies of (1-4)b yielded the gold(III) [{(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)}methylidene]AuBr3 (1-4)c complexes upon reaction with molecular bromine and the gold(I) perfluorophenylthiolato derivatives, [{(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)}methylidene]AuSC6F5 (1-4)d, upon treatment with C6F5SH.
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2
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Dey S, Ghosh P. Accessing Heteroannular Benzoxazole and Benzimidazole Scaffolds via Carbodiimides Using Azide-Isocyanide Cross-Coupling as Catalyzed by Mesoionic Singlet Palladium Carbene Complexes Derived from a Phenothiazine Moiety. ACS OMEGA 2023; 8:11039-11064. [PMID: 37008148 PMCID: PMC10061513 DOI: 10.1021/acsomega.2c07875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 02/23/2023] [Indexed: 06/19/2023]
Abstract
The coupling of aryl and aliphatic azides with isocyanides yielding carbodiimides (8-17) were efficiently catalyzed by well-defined structurally characterized trans-(MIC)PdI2(L) [MIC = 1-CH2Ph-3-Me-4-(CH2N(C6H4)2S)-1,2,3-triazol-5-ylidene, L = NC5H5 (4), MesNC (5)], trans-(MIC)2PdI2 (6), and cis-(MIC)Pd(PPh3)I2 (7) type palladium complexes, which incidentally mark the first instances of the use of mesoionic singlet palladium carbene complexes for the said application. As observed from the product yields, the catalytic activity varied in the order 4 > 5 ∼ 6 > 7 for these complexes. A detailed mechanistic studies indicated that the catalysis proceeded via a palladium(0) (4a-7 a) species. Using a representative palladium precatalyst (4), the azide-isocyanide coupling was successfully extended to synthesizing two different bioactive heteroannular benzoxazole (18-22) and benzimidazole (23-27) derivatives, thereby broadening the scope of the catalytic application.
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Affiliation(s)
- Shreyata Dey
- Department
of Chemistry Indian Institute of Technology
Bombay Powai, Mumbai 400 076, India
| | - Prasenjit Ghosh
- Department
of Chemistry Indian Institute of Technology
Bombay Powai, Mumbai 400 076, India
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3
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Ahmadvand Z, Bayat M. Theoretical study of formation mechanism for 4-methyl-3-phenylbenzonitrile in the course of the Hiyama and Suzuki–Miyaura reactions. MENDELEEV COMMUNICATIONS 2023. [DOI: 10.1016/j.mencom.2023.02.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
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4
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Transition Metal Catalyzed Hiyama Cross-Coupling: Recent Methodology Developments and Synthetic Applications. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27175654. [PMID: 36080422 PMCID: PMC9458230 DOI: 10.3390/molecules27175654] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/22/2022] [Accepted: 08/26/2022] [Indexed: 11/17/2022]
Abstract
Hiyama cross-coupling is a versatile reaction in synthetic organic chemistry for the construction of carbon-carbon bonds. It involves the coupling of organosilicons with organic halides using transition metal catalysts in good yields and high enantioselectivities. In recent years, hectic progress has been made by researchers toward the synthesis of diversified natural products and pharmaceutical drugs using the Hiyama coupling reaction. This review emphasizes the recent synthetic developments and applications of Hiyama cross-coupling.
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5
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Ayogu JI, Onoabedje EA. Prospects and Applications of Palladium Nanoparticles in the Cross-coupling of (hetero)aryl Halides and Related Analogues. ChemistryOpen 2021; 10:430-450. [PMID: 33590728 PMCID: PMC8015734 DOI: 10.1002/open.202000309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Indexed: 12/14/2022] Open
Abstract
Discovering efficient methods for the formation of carbon-carbon bonds is a central ongoing theme in organic synthesis. Cross-coupling reactions catalysed by metal nanoparticles are attractive alternatives to the traditional use of metal counterparts due to the catalytic tunability, selectivity, recyclability and reusability of the nanoparticles. The ongoing search for sustainable processes demands that reusable and environmentally benign catalysts are used. While the advantages of nanoparticles catalysts over bulk catalysts cannot be overemphasised, the problem of sintering, agglomeration and leaching are drawbacks to their full industrial applications. Hence, efforts are being made towards advancing the efficiency of the catalytic nanoparticle systems over the years. This review presents the progress, the challenges and the prospects of palladium nanoparticle with focus on Heck, Suzuki, Hiyama and Sonogashira cross-coupling reactions involving (hetero) aryl halides and the analogues.
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Affiliation(s)
- Jude I. Ayogu
- Department of Chemistry, School of Physical and Chemical ScienceUniversity of CanterburyChristchurch8040New Zealand
- Department of Pure and Industrial ChemistryUniversity of NigeriaNsukka410001Nigeria
| | - Efeturi A. Onoabedje
- Department of Pure and Industrial ChemistryUniversity of NigeriaNsukka410001Nigeria
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6
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Ahmadvand Z, Bayat M. Competition between the Hiyama and Suzuki–Miyaura Pd-catalyzed cross-coupling reaction mechanisms for the formation of some regioselective derivatives of quinoxaline and benzofuran; Which reaction mechanism is more favorable? J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Cárdenas J, Gaviño R, García-Ríos E, Rios-Ruiz L, Puello-Cruz AC, Morales-Serna FN, Gómez S, López-Torres A, Morales-Serna JA. The Heck reaction of allylic alcohols catalysed by an N-heterocyclic carbene-Pd( ii) complex and toxicity of the ligand precursor for the marine benthic copepod Amphiascoides atopus. RSC Adv 2021; 11:20278-20284. [PMID: 35479906 PMCID: PMC9033956 DOI: 10.1039/d1ra03484g] [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: 05/04/2021] [Accepted: 05/31/2021] [Indexed: 11/21/2022] Open
Abstract
The palladium-catalysed reaction of aryl halides and allylic alcohols is an attractive method for obtaining α,β-unsaturated aldehydes and ketones, which represent key intermediates in organic synthesis. In this context, a 1,2,3-triazol-5-ylidene (aNHC)-based palladium(ii) complex formed in situ has been found to be a selective catalyst for the syntheses of building blocks from the corresponding aryl halides and allylic alcohols, with yields ranging from 50% to 90%. The lack of toxic effects of the ligand precursor (1,2,3-triazolium salt) of the palladium(ii) complex for the harpacticoid copepod Amphiascoides atopus allowed us to contrast the efficiency of the catalytic system with the potential impact of the principal waste chemical in global aquatic ecosystems, which has not been previously addressed. A 1,2,3-triazol-5-ylidene (aNHC)-based palladium(ii) complex formed in situ has been found to be an efficient catalyst in the formation of C–C bonds.![]()
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Affiliation(s)
- Jorge Cárdenas
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad de México
- México
| | - Ruben Gaviño
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad de México
- México
| | - Eréndira García-Ríos
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad de México
- México
| | - Lucero Rios-Ruiz
- Instituto de Química
- Universidad Nacional Autónoma de México
- Ciudad de México
- México
| | - Ana C. Puello-Cruz
- Centro de Investigación en Alimentación y Desarrollo A.C
- Unidad Académica Mazatlán en Acuicultura y Manejo Ambiental
- Mazatlán
- México
| | | | - Samuel Gómez
- Instituto de Ciencias del Mar y Limnología
- Universidad Nacional Autónoma de México
- Mazatlán
- México
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8
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New (NHC)Pd(II)(PPh3) complexes: synthesis, characterization, crystal structure and its application on Sonogashira and Mizoroki–Heck cross-coupling reactions. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-019-00859-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Modak S, Borah S, Prakasham A, Shaikh MM, Butcher RJ, Gangwar M, Ghosh P. A comparison between (a/n-NHC)PdX2(pyridine) and (a/n-NHC)2PdX2 (X = I, Cl) type complexes of abnormal fused-bicyclic imidazo[1,2-a]pyridine based N-heterocyclic carbene (a-NHC) and of normal imidazole based N-heterocyclic carbene (n-NHC) ligands in the Suzuki-Miyaura coupling reactions. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Marset X, Saavedra B, González-Gallardo N, Beaton A, León MM, Luna R, Ramón DJ, Guillena G. Palladium Mesoionic Carbene Pre-catalyst for General Cross-Coupling Transformations in Deep Eutectic Solvents. Front Chem 2019; 7:700. [PMID: 31709230 PMCID: PMC6819497 DOI: 10.3389/fchem.2019.00700] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 10/08/2019] [Indexed: 11/26/2022] Open
Abstract
A strong σ-donor mesoionic carbene ligand has been synthesized and applied to four different palladium-catalyzed cross-coupling transformations, proving the catalyst/medium compatibility and the increased activity of this system over previous reports in Deep Eutectic Solvent medium. Some cross-coupling processes could be carried out at room temperature and using aryl chlorides as starting materials. The possible implementation of multistep synthesis in eutectic mixtures has also been explored. The presence of palladium nanoparticles in the reaction media has been evaluated and correlated to the observed activity.
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Affiliation(s)
- Xavier Marset
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Beatriz Saavedra
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Nerea González-Gallardo
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Alexander Beaton
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Martín M León
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Raúl Luna
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Diego J Ramón
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Gabriela Guillena
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
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11
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Pretorius R, McDonald A, Regueira Beltrão da Costa L, Müller‐Bunz H, Albrecht M. Palladium(II), Rhodium(I), and Iridium(I) Complexes Containing
O
‐Functionalized 1,2,3‐Triazol‐5‐ylidene Ligands. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900724] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- René Pretorius
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
- School of Chemistry and Chemical Biology University College Dublin 4 Dublin Ireland
| | - Ava McDonald
- School of Chemistry and Chemical Biology University College Dublin 4 Dublin Ireland
| | | | - Helge Müller‐Bunz
- School of Chemistry and Chemical Biology University College Dublin 4 Dublin Ireland
| | - Martin Albrecht
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
- School of Chemistry and Chemical Biology University College Dublin 4 Dublin Ireland
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12
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Nasrollahzadeh M, Issaabadi Z, Varma RS. Magnetic Lignosulfonate-Supported Pd Complex: Renewable Resource-Derived Catalyst for Aqueous Suzuki-Miyaura Reaction. ACS OMEGA 2019; 4:14234-14241. [PMID: 31508546 PMCID: PMC6732764 DOI: 10.1021/acsomega.9b01640] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/11/2019] [Indexed: 05/05/2023]
Abstract
A novel strategy is described to prepare magnetic Pd nanocatalyst by conjugating lignin with Fe3O4 nanoparticles via activation of calcium lignosulfonate, followed by combination with Fe3O4 nanoparticles. Tethering 5-amino-1H-tetrazole to calcium lignosulfonate-magnetite hybrid through 3-chloropropyl triethoxysilane enabled coordination of Pd salt with Fe3O4-lignosulfonate@5-amino-1H-tetrazole. The underlying changes of the lignosulfonate are identified, and the structural morphology of attained Fe3O4-lignosulfonate@5-amino-1H-tetrazole-Pd(II) (FLA-Pd) is characterized by Fourier transform infrared, thermogravimetry differential thermal analysis, energy-dispersive spectrometry, field-emission scanning electron microscopy, transmission electron microscopy, and vibrating sample magnetometer (VSM). The synthesized FLA-Pd displayed high activity for phosphine-free C(sp2)-C(sp2) coupling in water, and the catalyst could be reused for seven successive cycles.
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Affiliation(s)
- Mahmoud Nasrollahzadeh
- Department of Chemistry,
Faculty of Science, University of Qom, P.O. Box 37185-359, Qom 3716944369, Iran
| | - Zahra Issaabadi
- Department of Chemistry,
Faculty of Science, University of Qom, P.O. Box 37185-359, Qom 3716944369, Iran
| | - Rajender S. Varma
- Regional Centre
of Advanced Technologies and Materials, Department of Physical Chemistry,
Faculty of Science, Palacký University
in Olomouc, Šlechtitelů
27, Olomouc 783 71, Czech Republic
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13
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Ramasamy B, Prakasham AP, Gangwar MK, Ghosh P. 1,4‐Conjugate Addition of Aryl boronic Acids on Cyclohexenone as Catalyzed by Rhodium(I) Complexes of
C
2
‐Symmetric Bioxazoline Fused N‐heterocyclic Carbenes. ChemistrySelect 2019. [DOI: 10.1002/slct.201902408] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Balasubramaniyam Ramasamy
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400 076
- BASF Chemicals India Pvt. LtdInnovation Campus Navi Mumbai 400 705
| | - A. P. Prakasham
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400 076
| | - Manoj Kumar Gangwar
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400 076
| | - Prasenjit Ghosh
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400 076
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14
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Yang J. Preparation and catalytic properties of the triphenylarsine and triphenylstibine-stabilized tri-heteroleptic NHC Pd‒allyl complexes. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.01.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Singh C, Prakasham AP, Ghosh P. Palladium Acyclic Diaminocarbene (ADC) Triflate Complexes as Effective Precatalysts for the Hiyama Alkynylation/Cyclization Reaction Yielding Benzofuran Compounds: Probing the Influence of the Triflate Co-Ligand in the One-Pot Tandem Reaction. ChemistrySelect 2019. [DOI: 10.1002/slct.201803292] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Chandan Singh
- Department of Chemistry; Indian Institute of Technology Bombay Powai; Mumbai 400 076 Fax: +91 22 2572 3480
| | - A. P. Prakasham
- Department of Chemistry; Indian Institute of Technology Bombay Powai; Mumbai 400 076 Fax: +91 22 2572 3480
| | - Prasenjit Ghosh
- Department of Chemistry; Indian Institute of Technology Bombay Powai; Mumbai 400 076 Fax: +91 22 2572 3480
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16
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Ayogu JI, Onoabedje EA. Recent advances in transition metal-catalysed cross-coupling of (hetero)aryl halides and analogues under ligand-free conditions. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01331h] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The formation of new bonds is pivotal in organic chemistry and a prerequisite to life because it allows the construction of complex molecules from simple precursors.
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Affiliation(s)
- Jude I. Ayogu
- Department of Pure and Industrial Chemistry
- University of Nigeria
- Nsukka
- Nigeria
- Department of Chemistry
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17
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PEPPSI-type palladium 1,2,3-triazolin-5-ylidene complexes – Synthesis, structure and catalytic properties in Suzuki-Miyaura coupling. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Zhang X, Yan X, Zhang B, Wang R, Guo S, Peng S. Mono- and dinuclear palladium(II) complexes incorporating 1,2,3-triazole-derived mesoionic carbenes: syntheses, solid-state structures and catalytic applications. TRANSIT METAL CHEM 2018. [DOI: 10.1007/s11243-018-0267-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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19
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Vivancos Á, Segarra C, Albrecht M. Mesoionic and Related Less Heteroatom-Stabilized N-Heterocyclic Carbene Complexes: Synthesis, Catalysis, and Other Applications. Chem Rev 2018; 118:9493-9586. [PMID: 30014699 DOI: 10.1021/acs.chemrev.8b00148] [Citation(s) in RCA: 323] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mesoionic carbenes are a subclass of the family of N-heterocyclic carbenes that generally feature less heteroatom stabilization of the carbenic carbon and hence impart specific donor properties and reactivity schemes when coordinated to a transition metal. Therefore, mesoionic carbenes and their complexes have attracted considerable attention both from a fundamental point of view as well as for application in catalysis and beyond. As a follow-up of an earlier Chemical Reviews overview from 2009, the organometallic chemistry of N-heterocyclic carbenes with reduced heteroatom stabilization is compiled for the 2008-2017 period, including specifically the chemistry of complexes containing 1,2,3-triazolylidenes, 4-imidazolylidenes, and related 5-membered N-heterocyclic carbenes with reduced heteratom stabilization such as (is)oxazolylidenes, pyrrazolylidenes, and thiazolylidenes, as well as pyridylidenes as 6-membered N-heterocyclic carbenes with reduced heteroatom stabilization. For each ligand subclass, metalation strategies, electronic and steric properties, and applications, in particular, in metal-mediated catalysis, are compiled. Mesoionic carbenes demonstrate particularly high activity in (water) oxidation, hydrogen transfer reactions, and cyclization reactions. Unique features of these ligands are identified such as their dipolar structure, their specific donor properties, as well as stability aspects of the ligand and the complexes, which provides opportunities for further research.
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Affiliation(s)
- Ángela Vivancos
- Department of Chemistry and Biochemistry , University of Bern , Freiestrasse 3 , CH-3012 Bern , Switzerland.,Departamento de Química Inorgánica , Universidad de Murcia , Apartado 4021 , 30071 Murcia , Spain
| | - Candela Segarra
- Department of Chemistry and Biochemistry , University of Bern , Freiestrasse 3 , CH-3012 Bern , Switzerland.,Instituto de Tecnología Química , Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas , Avenida de los Naranjos s/n , 46022 Valencia , Spain
| | - Martin Albrecht
- Department of Chemistry and Biochemistry , University of Bern , Freiestrasse 3 , CH-3012 Bern , Switzerland
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20
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Mondal T, De S, Dutta S, Koley D. Mechanistic Exploration of the Transmetalation and Reductive Elimination Events Involving Pd IV -Abnormal NHC Complexes in Suzuki-Miyaura Coupling Reactions: A DFT Study. Chemistry 2018; 24:6155-6168. [PMID: 29411924 DOI: 10.1002/chem.201800024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Indexed: 12/25/2022]
Abstract
A comprehensive DFT (M06-L-D3(SMD)/BS2//M06-L/BS1 level) investigation has been carried out to explore in detail the mechanism of the transmetalation and reductive elimination reactions of abnormal N-heterocyclic carbene (aNHC) palladium(IV) complexes within the framework of Suzuki-Miyaura cross-coupling reactions. Emphasis was placed on the role of base and the effect of countercations on the critical transmetalation and reductive elimination events involving palladium(IV) complexes. Of the two competing roles of the base, the route involving boronate formation followed by halide exchange prevails over that of direct halide exchange for the intermediates [PdIV (aNHC)(OMe)2 Cl]- Na+ (pathway A), [PdIV (aNHC)(OMe)(Cl)2 ]- Na+ (pathway B), and [PdIV (aNHC)Cl3 ]- Na+ (pathway C) emanating from the oxidative addition reaction. The results of the calculations are in accordance with our previous theoretical findings of favorable energetics for palladium intermediates incorporating two coordinated methoxy groups. The negative role played by the countercation in the transmetalation step is mainly due to the overstabilization of the pre-transmetalation intermediate, which is in line with experimental kinetic results. The anionic complexes exhibit greater affinity for the transmetalation and reductive elimination reactions than the neutral variants.
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Affiliation(s)
- Totan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
| | - Sriman De
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
| | - Sayan Dutta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
| | - Debasis Koley
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
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Singh C, Prakasham AP, Gangwar MK, Butcher RJ, Ghosh P. One-Pot Tandem Hiyama Alkynylation/Cyclizations by Palladium(II) Acyclic Diaminocarbene (ADC) Complexes Yielding Biologically Relevant Benzofuran Scaffolds. ACS OMEGA 2018; 3:1740-1756. [PMID: 31458491 PMCID: PMC6641338 DOI: 10.1021/acsomega.7b01974] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 01/23/2018] [Indexed: 06/10/2023]
Abstract
A series of palladium acyclic diaminocarbene (ADC) complexes of the type cis-[(R1NH)(R2)methylidene]PdCl2(CNR1) [R1 = 2,4,6-(CH3)3C6H2: R2 = NC5H10 (2); NC4H8 (3); NC4H8O (4)] were used not only to perform the Csp2 -Csp Hiyama coupling between aryl iodide and triethoxysilylalkynes but also to subsequently carry out the one-pot tandem Hiyama alkynylation/cyclization reaction between 2-iodophenol and triethoxysilylalkynes, giving a convenient time-efficient access to the biologically relevant benzofuran compounds. The palladium ADC complexes (2-4) were conveniently synthesized by the nucleophilic addition of secondary amines, namely, piperidine, pyrrolidine, and morpholine on the cis-{(2,4,6-(CH3)3C6H2)NC}2PdCl2 in moderate yields (ca. 61-66%).
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Affiliation(s)
- Chandan Singh
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | - A. P. Prakasham
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | - Manoj Kumar Gangwar
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | - Raymond J. Butcher
- Department
of Chemistry, Howard University, Washington DC 20059, United States
| | - Prasenjit Ghosh
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
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22
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Kumar D, Prakasham AP, Das S, Datta A, Ghosh P. Cyanosilylation of Aromatic Aldehydes by Cationic Ruthenium(II) Complexes of Benzimidazole-Derived O-Functionalized N-Heterocyclic Carbenes at Ambient Temperature under Solvent-Free Conditions. ACS OMEGA 2018; 3:1922-1938. [PMID: 31458504 PMCID: PMC6641528 DOI: 10.1021/acsomega.7b02090] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 01/30/2018] [Indexed: 05/03/2023]
Abstract
A series of ruthenium complexes, namely, [{1-(N-R1-2-acetamido)-3-(R2)-benzimidazol-2-ylidine}Ru(p-cymene)Cl]Cl, where {R1 = 2,6-(i-Pr)2C6H3, R2 = i-Pr (1c); R1 = 2,6-(i-Pr)2C6H3, R2 = Et (2c); R1 = 2,4,6-(CH3)3C6H2, R2 = Et (3c)}, of benzimidazole-derived N/O-functionalized N-heterocyclic carbene ligands successfully carried out the cyanosilylation reaction of aromatic aldehydes and heteroaryl aldehydes with trimethylsilyl cyanide, providing good to excellent yields (ca. 60-95%) at room temperature under solvent-free condition. The ruthenium (1-3)c complexes were synthesized from the silver (1-3)b analogues in ca. 67-80% yields. The silver (1-3)b complexes exhibited an argentophilic d 10···d 10 interaction in its dinuclear macrometallacyclic motif, as observed by a short Ag···Ag contact of 3.1894(3) Å in single-crystal X-ray diffraction studies for a representative silver complex 2b and also in photoluminescence studies that showed characteristic emission band(s) at ca. 534-536 nm in the CHCl3 solution and at ca. 482-487 and 530-533 nm in the solid state.
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23
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Lorkowski J, Żak P, Kubicki M, Pietraszuk C, Jędrzkiewicz D, Ejfler J. Dimeric palladium 1,2,3-triazol-5-ylidene complexes – synthesis, structure, reactivity and catalytic properties in Suzuki coupling. NEW J CHEM 2018. [DOI: 10.1039/c8nj00981c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium 1,2,3-triazol-5-ylidene dimers transform to bis(carbene) species and in Suzuki coupling conditions lose carbene via reductive elimination of a 5-aryltriazolium salt.
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Affiliation(s)
- Jan Lorkowski
- Adam Mickiewicz University in Poznań
- Faculty of Chemistry
- 61-614 Poznań
- Poland
| | - Patrycja Żak
- Adam Mickiewicz University in Poznań
- Faculty of Chemistry
- 61-614 Poznań
- Poland
| | - Maciej Kubicki
- Adam Mickiewicz University in Poznań
- Faculty of Chemistry
- 61-614 Poznań
- Poland
| | - Cezary Pietraszuk
- Adam Mickiewicz University in Poznań
- Faculty of Chemistry
- 61-614 Poznań
- Poland
| | | | - Jolanta Ejfler
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
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24
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Catalytic cross-coupling reaction of aryl iodides with triarylbismuths by an N-heterocyclic carbene-PdCl2 based on benzo-9-crown-3 catalyst at room temperature. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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25
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Pretorius R, Olguín J, Albrecht M. Carbohydrate-Functionalized 1,2,3-Triazolylidene Complexes for Application in Base-Free Alcohol and Amine Oxidation. Inorg Chem 2017; 56:12410-12420. [DOI: 10.1021/acs.inorgchem.7b01899] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- René Pretorius
- Departement für
Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
- School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Juan Olguín
- School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Martin Albrecht
- Departement für
Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
- School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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26
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Pretorius R, Mazloomi Z, Albrecht M. Synthesis, hemilability, and catalytic transfer hydrogenation activity of iridium(III) and ruthenium(II) complexes containing oxygen-functionalised triazolylidene ligands. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Mazloomi Z, Pretorius R, Pàmies O, Albrecht M, Diéguez M. Triazolylidene Iridium Complexes for Highly Efficient and Versatile Transfer Hydrogenation of C═O, C═N, and C═C Bonds and for Acceptorless Alcohol Oxidation. Inorg Chem 2017; 56:11282-11298. [DOI: 10.1021/acs.inorgchem.7b01707] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Zahra Mazloomi
- Departament de Química
Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·lí
Domingo, 1, 43007 Tarragona, Spain
- Department of Chemistry
and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - René Pretorius
- Department of Chemistry
and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Oscar Pàmies
- Departament de Química
Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·lí
Domingo, 1, 43007 Tarragona, Spain
| | - Martin Albrecht
- Department of Chemistry
and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Montserrat Diéguez
- Departament de Química
Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·lí
Domingo, 1, 43007 Tarragona, Spain
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28
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Ramasamy B, Kumar Gangwar M, Ghosh P. Chiral Oxazolidine-Fused N-Heterocyclic Carbene Complexes of Rhodium and Iridium and Their Utility in the Asymmetric Transfer Hydrogenation of Ketones. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700303] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Balasubramaniyam Ramasamy
- BASF Chemicals India Pvt. Ltd. Chandivali 400072 Mumbai India
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
| | - Manoj Kumar Gangwar
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
| | - Prasenjit Ghosh
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
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29
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Kumar A, Prakasham AP, Gangwar MK, Vishnoi P, Butcher RJ, Ghosh P. An Efficient Synthetic Approach to
trans
‐(NHC)
2
Pd(R)Br Type Complexes and Their Use in Suzuki–Miyaura Cross‐Coupling Reactions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anuj Kumar
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
| | - A. P. Prakasham
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
| | - Manoj Kumar Gangwar
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
| | - Pratap Vishnoi
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
| | | | - Prasenjit Ghosh
- Department of Chemistry Indian Institute of Technology Bombay Powai 400076 Mumbai India
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30
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Schweinfurth D, Hettmanczyk L, Suntrup L, Sarkar B. Metal Complexes of Click-Derived Triazoles and Mesoionic Carbenes: Electron Transfer, Photochemistry, Magnetic Bistability, and Catalysis. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700030] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- David Schweinfurth
- Institut für Chemie und Biochemie, Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Lara Hettmanczyk
- Institut für Chemie und Biochemie, Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Lisa Suntrup
- Institut für Chemie und Biochemie, Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
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31
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Ramakrishna V, Dastagiri Reddy N. Synthesis of zwitterionic palladium complexes and their application as catalysts in cross-coupling reactions of aryl, heteroaryl and benzyl bromides with organoboron reagents in neat water. Dalton Trans 2017. [DOI: 10.1039/c7dt01433c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Imidazolium substituted quinoxaline based zwitterionic Pd(ii) complexes were synthesized and found to be excellent catalysts for carrying out Suzuki–Miyaura cross-coupling reactions in neat water.
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Affiliation(s)
- V. Ramakrishna
- Department of Chemistry
- Pondicherry University
- Pondicherry 605014
- India
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32
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Hettmanczyk L, Schmid B, Hohloch S, Sarkar B. Palladium(ii)-Acetylacetonato Complexes with Mesoionic Carbenes: Synthesis, Structures and Their Application in the Suzuki-Miyaura Cross Coupling Reaction. Molecules 2016; 21:molecules21111561. [PMID: 27869699 PMCID: PMC6274386 DOI: 10.3390/molecules21111561] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 11/02/2016] [Accepted: 11/12/2016] [Indexed: 12/20/2022] Open
Abstract
A series of novel palladium(ii) acetylacetonato complexes bearing mesoionic carbenes (MICs) have been synthesized and characterized. The synthesis of the complexes of type (MIC)Pd(acac)I (MIC = 1-mesityl-3-methyl-4-phenyl-1,2,3-triazol-5-ylidene (1), 1,4-(2,4,6-methyl)-phenyl-3-methyl-1,2,3-triazol-5-ylidene (2), 1,4-(2,6-diisopropyl)-phenyl-3-methyl-1,2,3-triazol-5-ylidene (3); acac = acetylacetonato) via direct metalation starting from the corresponding triazolium iodides and palladium(ii) acetylacetonate is described herein. All complexes were characterized by 1H- and 13C-NMR spectroscopy and high resolution mass spectrometry. Additionally, two of the complexes were characterized by single crystal X-ray crystallography confirming a square-planar coordination geometry of the palladium(ii) center. A delocalized bonding situation was observed within the triazolylidene rings as well as for the acac ligand respectively. Complex 2 was found to be an efficient pre-catalyst for the Suzuki-Miyaura cross coupling reaction between aryl-bromides or -chlorides with phenylboronic acid.
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Affiliation(s)
- Lara Hettmanczyk
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, Berlin D-14195, Germany.
| | - Bianca Schmid
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, Berlin D-14195, Germany.
| | - Stephan Hohloch
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, Berlin D-14195, Germany.
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, Berlin D-14195, Germany.
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33
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Mondal T, De S, Maity B, Koley D. Exploring the Oxidative-Addition Pathways of Phenyl Chloride in the Presence of Pd II Abnormal N-Heterocyclic Carbene Complexes: A DFT Study. Chemistry 2016; 22:15778-15790. [PMID: 27642746 DOI: 10.1002/chem.201602735] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Indexed: 11/10/2022]
Abstract
DFT calculations were performed to elucidate the oxidative addition mechanism of the dimeric palladium(II) abnormal N-heterocyclic carbene complex 2 in the presence of phenyl chloride and NaOMe base under the framework of a Suzuki-Miyaura cross-coupling reaction. Pre-catalyst 2 undergoes facile, NaOMe-assisted dissociation, which led to monomeric palladium(II) species 5, 6, and 7, each of them independently capable of initiating oxidative addition reactions with PhCl. Thereafter, three different mechanistic routes, path a, path b, and path c, which originate from the catalytic species 5, 7, and 6, were calculated at M06-L-D3(SMD)/LANL2TZ(f)(Pd)/6-311++G**//M06-L/LANL2DZ(Pd)/6-31+G* level of theory. All studied routes suggested the rather uncommon PdII /PdIV oxidative addition mechanism to be favourable under the ambient reaction conditions. Although the Pd0 /PdII routes are generally facile, the final reductive elimination step from the catalytic complexes were energetically formidable. The PdII /PdIV activation barriers were calculated to be 11.3, 9.0, 26.7 kcal mol-1 (ΔΔ≠ GLS-D3 ) more favourable than the PdII /Pd0 reductive elimination routes for path a, path b, and path c, respectively. Out of all the studied pathways, path a was the most feasible as it comprised of a PdII /PdIV activation barrier of 24.5 kcal mol-1 (ΔGLS-D3 ). To further elucidate the origin of transition-state barriers, EDA calculations were performed for some key saddle points populating the energy profiles.
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Affiliation(s)
- Totan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur -, 741 246, India
| | - Sriman De
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur -, 741 246, India
| | - Bholanath Maity
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur -, 741 246, India
| | - Debasis Koley
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur -, 741 246, India.
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34
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Piperazine- and DABCO-bridged dinuclearN-heterocyclic carbene palladium complexes: synthesis, structure and application to Hiyama coupling reaction. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3543] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Osińska M, Gniewek A, Trzeciak AM. Suzuki–Miyaura and Hiyama coupling catalyzed by PEPPSI-type complexes with non-bulky NHC ligand. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.03.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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Yuen OY, So CM, Man HW, Kwong FY. A General Palladium-Catalyzed Hiyama Cross-Coupling Reaction of Aryl and Heteroaryl Chlorides. Chemistry 2016; 22:6471-6. [PMID: 26998586 DOI: 10.1002/chem.201600420] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 11/06/2022]
Abstract
A general palladium-catalyzed Hiyama cross-coupling reaction of aryl and heteroaryl chlorides with aryl and heteroaryl trialkoxysilanes by a Pd(OAc)2 /L2 catalytic system is presented. A newly developed water addition protocol can dramatically improve the product yields. The conjugation of the Pd/L2 system and the water addition protocol can efficiently catalyze a broad range of electron-rich, -neutral, -deficient, and sterically hindered aryl chlorides and heteroaryl chlorides with excellent yields within three hours and the catalyst loading can be down to 0.05 mol % Pd for the first time. Hiyama coupling of heteroaryl chlorides with heteroaryl silanes is also reported for the first time. The reaction can be easily scaled up 200 times (100 mmol) without any degasification and purification of reactants; this facilitates the practical application in routine synthesis.
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Affiliation(s)
- On Ying Yuen
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China.,The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI), Shenzhen, P. R. of China
| | - Chau Ming So
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China. .,The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI), Shenzhen, P. R. of China.
| | - Ho Wing Man
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China. .,The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI), Shenzhen, P. R. of China.
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37
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Iwasaki H, Yamada Y, Ishikawa R, Koga Y, Matsubara K. Isolation and Structures of 1,2,3-Triazole-Derived Mesoionic Biscarbenes with Bulky Aromatic Groups. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501626] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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38
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Kumar A, Gangwar MK, Prakasham AP, Mhatre D, Kalita AC, Ghosh P. Accessing a Biologically Relevant Benzofuran Skeleton by a One-Pot Tandem Heck Alkynylation/Cyclization Reaction Using Well-Defined Palladium N-Heterocyclic Carbene Complexes. Inorg Chem 2016; 55:2882-93. [DOI: 10.1021/acs.inorgchem.5b02727] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | - Prasenjit Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
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39
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Iwasaki H, Teshima Y, Yamada Y, Ishikawa R, Koga Y, Matsubara K. Bimetallic Cu(i) complex with a pyridine-bridged bis(1,2,3-triazole-5-ylidene) ligand. Dalton Trans 2016; 45:5713-9. [DOI: 10.1039/c6dt00008h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Expanded π-conjugated system catalyst for hydroboration of alkenes.
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Affiliation(s)
- Haruka Iwasaki
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Yuta Teshima
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Yuji Yamada
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Ryuta Ishikawa
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Yuji Koga
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Kouki Matsubara
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
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40
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Yang J. Mono- and dinuclear palladium(ii) complexes containing both N-heterocyclic carbenes and tetrazole ligands as catalysts for Hiyama coupling. NEW J CHEM 2016. [DOI: 10.1039/c6nj02320g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Six tetrazole ligand stabilized NHC–Pd complexes have been synthesized and fully characterized. Catalytic performance of the obtained palladium catalysts has been investigated for the Hiyama coupling reaction.
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Affiliation(s)
- Jin Yang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
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