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Kurpik G, Walczak A, Gołdyn M, Harrowfield J, Stefankiewicz AR. Pd(II) Complexes with Pyridine Ligands: Substituent Effects on the NMR Data, Crystal Structures, and Catalytic Activity. Inorg Chem 2022; 61:14019-14029. [PMID: 35985051 PMCID: PMC9455277 DOI: 10.1021/acs.inorgchem.2c01996] [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] [Indexed: 11/28/2022]
Abstract
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A wide range of functionalized pyridine ligands have
been employed
to synthesize a variety of Pd(II) complexes of the general formulas
[PdL4](NO3)2 and [PdL2Y2], where L = 4-X-py
and Y = Cl– or NO3–. Their structures have been unambiguously established via analytical
and spectroscopic methods in solution (NMR spectroscopy and mass spectrometry)
as well as in the solid state (X-ray diffraction). This in-depth characterization
has shown that the functionalization of ligand molecules with groups
of either electron-withdrawing or -donating nature (EWG and EDG) results
in significant changes in the physicochemical properties of the desired
coordination compounds. Downfield shifts of signals in the 1H NMR spectra were observed upon coordination within and across the
complex families, clearly indicating the relationship between NMR
chemical shifts and the ligand basicity as estimated from pKa values. A detailed crystallographic study
has revealed the operation of a variety of weak interactions, which
may be factors explaining aspects of the solution chemistry of the
complexes. The Pd(II) complexes have been found to be efficient and
versatile precatalysts in Suzuki–Miyaura and Heck cross-coupling
reactions within a scope of structurally distinct substrates, and
factors have been identified that have contributed to efficiency improvement
in both processes. A wide range
of pyridine derivatives have been employed
to synthesize a variety of di- and tetrasubstituted Pd(II) complexes
of square-planar geometry. This in-depth characterization has shown
that the functionalization of ligand molecules with groups of either
electron-withdrawing or -donating nature results in significant changes
in the physicochemical properties of the coordination compounds. Moreover,
the complexes have been found to be of practical utility as efficient
precatalysts for both Suzuki−Miyaura and Heck cross-coupling
reactions.
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Affiliation(s)
- Gracjan Kurpik
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland.,Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
| | - Anna Walczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland.,Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
| | - Mateusz Gołdyn
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland
| | - Jack Harrowfield
- Institut de Science et d'Ingénierie Supramoléculaires, Université de Strasbourg, 8 allée Gaspard Monge, Strasbourg 67083, France
| | - Artur R Stefankiewicz
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland.,Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
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Abstract
CO2 is a compound of high stability which proves useful in some organic syntheses as a solvent or component decreasing explosivity of gases. It is also a good carbonylating agent for aliphatic amines although not for aromatic ones, the latter being carbonylated with phosgene or, as in our previous works, with CO/O2 in the presence of Pd(II) complexes. In this work we have used the mixture of CO/O2 and CO2 for carbonylation of aniline to N,N’-diphenylurea. After optimization of the reaction conditions (56% of CO2 in CO2/CO mixture) we studied the activity of three kinds of pre-catalysts: (a) Pd(II) complexes, (b) Pdblack, and (c) palladium nanoparticles (PdNPs) in the presence of derivatives of pyridine (XnPy). The highest conversion of aniline (with selectivity towards N,N-diphenylurea ca. 90%) was observed for PdNPs. The results show that catalytic cycle involves Pd(0) stabilized by pyridine ligand as active species. Basing on this observation, we put the hypothesis that application of PdNPs instead of Pd(II) complex can efficiently reduce the reaction time.
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Zhu Q, Sun X, Zhao H, Xu D, Dong Z. Selective Transfer Hydrogenation and N-Formylation of Nitroarenes by a Facilely Prepared N, S Co-doped Carbon-Encapsulated Cobalt Nanoparticle Catalyst. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06366] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qian Zhu
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Xun Sun
- Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC), School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, PR China
| | - Hong Zhao
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Dan Xu
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Zhengping Dong
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
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4
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Rajak R, Mohammad A, Chandra P, Mobin SM. Catalytic Application of Tactically Aligned Cd(II)‐Based Luminescent 3D‐Supramolecular Networks. ChemistrySelect 2019. [DOI: 10.1002/slct.201901214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Richa Rajak
- Discipline of ChemistryIndian Institute of Technology Indore, Simrol Khandwa Road Indore 453552 India
| | - Akbar Mohammad
- Discipline of ChemistryIndian Institute of Technology Indore, Simrol Khandwa Road Indore 453552 India
| | - Prakash Chandra
- Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of Technology Indore, Simrol Khandwa Road Indore 453552 India
| | - Shaikh M. Mobin
- Discipline of ChemistryIndian Institute of Technology Indore, Simrol Khandwa Road Indore 453552 India
- Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of Technology Indore, Simrol Khandwa Road Indore 453552 India
- Discipline of Biosciences and Bio-Medical EngineeringIndian Institute of Technology Indore, Simrol, Khandwa Road Indore 453552 India
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5
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Reduction of Nitrobenzene to Aniline by CO/H2O in the Presence of Palladium Nanoparticles. Catalysts 2019. [DOI: 10.3390/catal9050404] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The transformation of aromatic nitrocompounds into amines by CO/H2O is catalyzed by palladium(II) complexes. Recently, we have proposed that the catalytic cycle includes Pd0 as the transient intermediate and herein, for the first time, we describe the application of palladium nanoparticles (PdNPs) stabilized by monodentate N-heterocyclic ligands as nanocatalysts facilitating the reduction of Ar–NO2 into Ar–NH2 by CO/H2O. Among the series—Pd(II) complexes, PdNPs and commercial Pdblack—the highest catalytic activity was observed for PdNPs (3.0 ± 0.5 nm) stabilized by 4-Me-pyridine in the presence of 2-Cl-pyridine. The results may be helpful for mechanistic considerations on the role of metallic nanoparticles as active species in other organic processes.
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6
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Lakshminarayana B, Satyanarayana G, Subrahmanyam C. Bimetallic Pd-Au/TiO 2 Nanoparticles: An Efficient and Sustainable Heterogeneous Catalyst for Rapid Catalytic Hydrogen Transfer Reduction of Nitroarenes. ACS OMEGA 2018; 3:13065-13072. [PMID: 31458027 PMCID: PMC6645369 DOI: 10.1021/acsomega.8b02064] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 09/27/2018] [Indexed: 05/20/2023]
Abstract
Anilines are one of the important chemical feedstocks and are utilized for the preparation of a variety of pharmaceuticals, agrochemicals, pigments, and dyes. In this context, the catalytic reduction of nitro functionality is an industrially vital process for the synthesis of aniline derivatives. Herein, we report an efficient nanosized bimetallic Pd-Au/TiO2 nanomaterial which is proved to be quite efficient for rapid catalytic hydrogen transfer reduction of nitroarenes into corresponding amines. Significantly, the reduction process is successful under solvent-free and mild green atmospheric conditions. Bimetallic Pd-Au nanoparticles served as the active center, and TiO2 played as a support in hydrogen transfer from the source hydrazine monohydrate. Typical results highlighted that the reactions were very rapid and the products were obtained in good to excellent yields. Significantly, the process was successful in the presence of a very low amount catalyst (0.1 mol %). Furthermore, the reaction showed good chemoselectivity and compatiblity with double or triple bond, aldehyde, ketone, and ester functionalities on the aromatic ring. Typical results indicated the true heterogeneous nature of the Pd-Au/TiO2 nanocatalyst, where the catalyst retained the activity, without loss of its activity.
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Chen X, Zhou XY, Wu H, Lei, YZ, Li JH. Highly efficient reduction of nitro compounds: Recyclable Pd/C-catalyzed transfer hydrogenation with ammonium formate or hydrazine hydrate as hydrogen source. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2018.1484924] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Hong Wu
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Yi-Zhu Lei,
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Jin-Hui Li
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
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8
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Krogul-Sobczak A, Kasperska P, Litwinienko G. N-heterocyclic monodentate ligands as stabilizing agents for catalytically active Pd-nanoparticles. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2017.10.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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9
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Kumbhar A. Functionalized nitrogen ligands for palladium catalyzed cross-coupling reactions (part I). J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.07.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Lin WH, Wu WC, Selvaraju M, Sun CM. One-pot synthesis of benzazoles and quinazolinones via iron pentacarbonyl mediated carbonylation of aryl iodides under microwave irradiation. Org Chem Front 2017. [DOI: 10.1039/c6qo00733c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A direct and unconventional method for the synthesis of benzazoles and quinazolinones is discovered by using iron pentacarbonyl as a reducing agent and a solid carbon monoxide source under microwave irradiation.
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Affiliation(s)
- Wun-Huei Lin
- Department of Applied Chemistry
- National Chiao-Tung University
- Hsinchu 300-10
- Republic of China
| | - Wen-Chun Wu
- Department of Applied Chemistry
- National Chiao-Tung University
- Hsinchu 300-10
- Republic of China
| | - Manikandan Selvaraju
- Department of Applied Chemistry
- National Chiao-Tung University
- Hsinchu 300-10
- Republic of China
| | - Chung-Ming Sun
- Department of Applied Chemistry
- National Chiao-Tung University
- Hsinchu 300-10
- Republic of China
- Department of Medicinal and Applied Chemistry
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11
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Ambrosi A, Denmark SE. Harnessing the Power of the Water-Gas Shift Reaction for Organic Synthesis. Angew Chem Int Ed Engl 2016; 55:12164-89. [PMID: 27595612 PMCID: PMC6201252 DOI: 10.1002/anie.201601803] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Indexed: 11/06/2022]
Abstract
Since its original discovery over a century ago, the water-gas shift reaction (WGSR) has played a crucial role in industrial chemistry, providing a source of H2 to feed fundamental industrial transformations such as the Haber-Bosch synthesis of ammonia. Although the production of hydrogen remains nowadays the major application of the WGSR, the advent of homogeneous catalysis in the 1970s marked the beginning of a synergy between WGSR and organic chemistry. Thus, the reducing power provided by the CO/H2 O couple has been exploited in the synthesis of fine chemicals; not only hydrogenation-type reactions, but also catalytic processes that require a reductive step for the turnover of the catalytic cycle. Despite the potential and unique features of the WGSR, its applications in organic synthesis remain largely underdeveloped. The topic will be critically reviewed herein, with the expectation that an increased awareness may stimulate new, creative work in the area.
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Affiliation(s)
- Andrea Ambrosi
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Scott E Denmark
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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12
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Ambrosi A, Denmark SE. Die Wassergas‐Shift‐Reaktion in der organischen Synthese. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601803] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Andrea Ambrosi
- Department of Chemistry University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Scott E. Denmark
- Department of Chemistry University of Illinois at Urbana-Champaign Urbana IL 61801 USA
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13
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Zhang HN, Jia WG, Xu QT, Ji CC. Synthesis, characterization and catalytic activity of gold complexes with pyridine-based selone ligands. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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