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Yu M, Li Y, Zhang C, Luo H, Ge C, Chen X, Fu L, Ju Z, Yao X. Fischer-Helferich glycosidation mechanism of glucose to methyl glycosides over Al-based catalysts in alcoholic media. RSC Adv 2022; 12:23416-23426. [PMID: 36090444 PMCID: PMC9382650 DOI: 10.1039/d2ra03945a] [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: 06/27/2022] [Accepted: 08/10/2022] [Indexed: 11/25/2022] Open
Abstract
The Fischer-Helferich glycosidation reaction is generally the initial step in the conversion of glucose to levulinate in alcohol media. However, the relevant molecular mechanism catalyzed by Al-based catalysts is still not well understood. In this work, the reaction mechanism of the glycosidation from glucose to methyl glycosides catalyzed by Al3+ coordinated with methanol/methoxyl was investigated through density functional theory (DFT) calculations. The whole reaction process includes ring-opening, addition, and ring-closure events. The addition of methanol to the ring-opening structure of glucose makes the electronegativity of C1 site stronger to proceed with the following ring-closure reaction. Among the 28 kinds of ways of ring-closure reaction, the most preferred way is to close the loop through the six-membered ring (O5-C1) to generate methyl glucoside (MDGP). The rate-determining step is the ring-closure and the Al3+ shows a great catalytic effect which is mainly reflected in coordinating with the solvents to transfer protons. The results would be helpful to understanding the Fischer-Helferich glycosidation mechanism catalyzed by Al-based catalysts and comprehend the conversion of glucose to high value-added chemicals.
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Affiliation(s)
- Mengting Yu
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 P. R. China
| | - Yao Li
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
| | | | | | - Chengsheng Ge
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 P. R. China
| | - Xiaobin Chen
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 P. R. China
| | - Lanlan Fu
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 P. R. China
| | - Zhaoyang Ju
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 P. R. China
- Xianhe Co., Ltd Quzhou 324000 P. R. China
| | - Xiaoqian Yao
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
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2
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Ju Z, Feng S, Ren L, Lei T, Cheng H, Yu M, Ge C. Probing the mechanism of the conversion of methyl levulinate into γ-valerolactone catalyzed by Al(OiPr) 3 in an alcohol solvent: a DFT study. RSC Adv 2022; 12:2788-2797. [PMID: 35425337 PMCID: PMC8979184 DOI: 10.1039/d1ra08429a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 01/06/2022] [Indexed: 11/27/2022] Open
Abstract
Biomass-derived γ-valerolactone (GVL) is a versatile chemical that can be used in various fields. As an efficient, cheap, and sustainable catalyst, Al(OiPr)3 has been successfully used in the conversion of methyl levulinate (ML) to GVL in the solvent isopropanol (IPA). However, the molecular mechanism of this conversion catalyzed by Al(OiPr)3 remains ambiguous. To investigate the mechanism of the conversion of ML to GVL catalyzed by Al(OiPr)3, the reaction pathways, including the transesterification, Meerwein-Ponndorf-Verley (MPV) hydrogenation, and ring-closure steps, were probed using density functional theory (DFT) calculations at the M062X-D3/def2-TZVP level. Among the elementary steps, it is found that ring-closure is the rate-determining step and that Al3+ can coordinate with the oxygen of 2-hydroxy-isopropyl levulinate (2HIPL) to catalyze the last ring-closure step. A four-centered transition state can be formed, and Al(OiPr)3 shows a strong catalytic effect in the two steps of the ester exchange reaction. The center of Al(OiPr)3 mainly coordinates with the carbonyl oxygen atom of the ester to catalyze the reaction. The present study provides some help in understanding the conversion mechanism of ML to GVL and designing more effective catalysts for use in biomass conversion chemistry.
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Affiliation(s)
- Zhaoyang Ju
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 China
| | - Shaokeng Feng
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 China
| | - Lanhui Ren
- Institute of Zhejiang University-Quzhou Quzhou, 324000 China
| | - Tingyu Lei
- Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan, 030001 China
| | - Haixiang Cheng
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 China
| | - Mengting Yu
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 China
| | - Chengsheng Ge
- College of Chemical & Material Engineering, Quzhou University Quzhou 324000 China
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3
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Neshat A, Mastrorilli P, Mousavizadeh Mobarakeh A. Recent Advances in Catalysis Involving Bidentate N-Heterocyclic Carbene Ligands. Molecules 2021; 27:95. [PMID: 35011327 PMCID: PMC8746573 DOI: 10.3390/molecules27010095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/02/2021] [Accepted: 12/13/2021] [Indexed: 11/17/2022] Open
Abstract
Since the discovery of persistent carbenes by the isolation of 1,3-di-l-adamantylimidazol-2-ylidene by Arduengo and coworkers, we witnessed a fast growth in the design and applications of this class of ligands and their metal complexes. Modular synthesis and ease of electronic and steric adjustability made this class of sigma donors highly popular among chemists. While the nature of the metal-carbon bond in transition metal complexes bearing N-heterocyclic carbenes (NHCs) is predominantly considered to be neutral sigma or dative bonds, the strength of the bond is highly dependent on the energy match between the highest occupied molecular orbital (HOMO) of the NHC ligand and that of the metal ion. Because of their versatility, the coordination chemistry of NHC ligands with was explored with almost all transition metal ions. Other than the transition metals, NHCs are also capable of establishing a chemical bond with the main group elements. The advances in the catalytic applications of the NHC ligands linked with a second tether are discussed. For clarity, more frequently targeted catalytic reactions are considered first. Carbon-carbon coupling reactions, transfer hydrogenation of alkenes and carbonyl compounds, ketone hydrosilylation, and chiral catalysis are among highly popular reactions. Areas where the efficacy of the NHC based catalytic systems were explored to a lesser extent include CO2 reduction, C-H borylation, alkyl amination, and hydroamination reactions. Furthermore, the synthesis and applications of transition metal complexes are covered.
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Affiliation(s)
- Abdollah Neshat
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran;
| | - Piero Mastrorilli
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona, I-70125 Bari, Italy;
| | - Ali Mousavizadeh Mobarakeh
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran;
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Guérin V, Legault CY. Synthesis of NHC-Iridium(III) Complexes Based on N-Iminoimidazolium Ylides and Their Use for the Amine Alkylation by Borrowing Hydrogen Catalysis. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00726] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Vincent Guérin
- University of Sherbrooke, Department of Chemistry, Centre in Green Chemistry and Catalysis,2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Claude Y. Legault
- University of Sherbrooke, Department of Chemistry, Centre in Green Chemistry and Catalysis,2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
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Evans KJ, Mansell SM. Functionalised N-Heterocyclic Carbene Ligands in Bimetallic Architectures. Chemistry 2020; 26:5927-5941. [PMID: 31981386 PMCID: PMC7317719 DOI: 10.1002/chem.201905510] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Indexed: 12/18/2022]
Abstract
N-Heterocyclic carbenes (NHCs) have become immensely successful ligands in coordination chemistry and homogeneous catalysis due to their strong terminal σ-donor properties. However, by targeting NHC ligands with additional functionalisation, a new area of NHC coordination chemistry has developed that has enabled NHCs to be used to build up bimetallic and multimetallic architectures. This minireview covers the development of functionalised NHC ligands that incorporate additional donor sites in order to coordinate two or more metal atoms. This can be through the N-atom of the NHC ring, through a donor group attached to the N-atom or the carbon backbone, coordination of the π-bond or an annulated π-donor on the backbone, or through direct metalation of the backbone.
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Affiliation(s)
- Kieren J. Evans
- Institute of Chemical SciencesHeriot-Watt UniversityEdinburghEH14 4ASUK
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6
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Ju Z, Yao X, Liu X, Ni L, Xin J, Xiao W. Theoretical Study on the Conversion Mechanism of Biobased 2,5-Dimethylfuran and Acrylic Acid into Aromatics Catalyzed by Brønsted Acid Ionic Liquids. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01585] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhaoyang Ju
- Biomass and Bioresource Utilization Laboratory, College of Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Xiaoqian Yao
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Xiaomin Liu
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Lingli Ni
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Jiayu Xin
- CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Weihua Xiao
- Biomass and Bioresource Utilization Laboratory, College of Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
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7
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Guérin V, Ménard A, Guernon H, Moutounet O, Legault CY. From Chelating to Bridging Ligands: N-Sulfonyliminoimidazolium Ylides as Precursors to Anionic N-Heterocyclic Carbene Ligands. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00764] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vincent Guérin
- Department of Chemistry, Centre in Green Chemistry and Catalysis, University of Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Alain Ménard
- Department of Chemistry, Centre in Green Chemistry and Catalysis, University of Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Hannah Guernon
- Department of Chemistry, Centre in Green Chemistry and Catalysis, University of Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Odile Moutounet
- Department of Chemistry, Centre in Green Chemistry and Catalysis, University of Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Claude Y. Legault
- Department of Chemistry, Centre in Green Chemistry and Catalysis, University of Sherbrooke, 2500 boul. de l’Université, Sherbrooke, Québec J1K 2R1, Canada
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8
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Hameury S, de Frémont P, Braunstein P. Metal complexes with oxygen-functionalized NHC ligands: synthesis and applications. Chem Soc Rev 2018; 46:632-733. [PMID: 28083579 DOI: 10.1039/c6cs00499g] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ligand design has met with considerable success with both categories of hybrid ligands, which are characterized by chemically different donor groups, and of N-heterocyclic carbenes (NHCs). Their spectacular development and diversity are attracting worldwide interest and offers almost unlimited diversity and potential in e.g. coordination/organometallic main group and transition metal chemistry, catalysis, medicinal chemistry and materials science. This review aims at providing a comprehensive update on a specific class of ligands that has enjoyed much attention in the past few years, at the intersection between the two categories mentioned above, that of hybrid NHC ligands in which the functionality associated with the carbene donor is of the oxygen-donor type. For each type of oxygen-donor present in such chelating (Section 1) or bridging (Section 2) hybrid ligands, we will examine the synthesis, structures and reactivity of their metal complexes and their applications, with a special focus on homogeneous catalysis (Section 3). Thus, hydrogenation, C-H bond activation, C-C, C-N, C-O bond formation, hydrolysis of silanes, oligomerization, polymerization, metathesis, hydrosilylation, C-C bond cleavage, acceptorless dehydrogenation, dehalogenation/hydrogen transfer, oxidation and reduction reactions will be successively presented in a tabular manner, to facilitate an overview and a rapid identification of the relevant publications describing which metals associated with a given oxygen functionality are most suitable. The literature coverage includes the year 2015.
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Affiliation(s)
- Sophie Hameury
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg, France. and Universität Freiburg, Makromolekulare Chemie, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
| | - Pierre de Frémont
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg, France. and Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Synthèse, Réactivité et Catalyse Organométalliques, 4 rue Blaise Pascal, 67081 Strasbourg, France
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg, France.
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9
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Sabir S, Kumar G, Jat JL. O-Substituted hydroxyl amine reagents: an overview of recent synthetic advances. Org Biomol Chem 2018; 16:3314-3327. [DOI: 10.1039/c8ob00146d] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Reagents derived from oxygen-substituted hydroxylamine facilitate stereo- and regioselective C–N, N–N, O–N, and S–N bond-formation reactions and intra-molecular cyclizations without any expensive metal catalysts. These remarkable transformations are discussed in this review.
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Affiliation(s)
- Shekh Sabir
- Department of Chemistry
- Baba Saheb Bhimrao Ambedkar University (a Central University)
- Vidya Vihar
- Lucknow 226025
- India
| | | | - Jawahar L. Jat
- Department of Chemistry
- Baba Saheb Bhimrao Ambedkar University (a Central University)
- Vidya Vihar
- Lucknow 226025
- India
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10
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Ju Z, Xiao W, Lu X, Liu X, Yao X, Zhang X, Zhang S. Theoretical studies on glycolysis of poly(ethylene terephthalate) in ionic liquids. RSC Adv 2018; 8:8209-8219. [PMID: 35541995 PMCID: PMC9078552 DOI: 10.1039/c7ra13173a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Accepted: 02/06/2018] [Indexed: 12/14/2022] Open
Abstract
Ionic liquids (ILs) present superior catalytic performance in the glycolysis of ethylene terephthalate (PET). To investigate the microscopic degradation mechanism of PET, density functional theory (DFT) calculations have been carried out for the interaction between ILs and dimer, which is considered to symbolize PET. We found that hydrogen bonds (H-bonds) play a critical role in the glycolysis process. In this study, 24 kinds of imidazolium-based and tertiary ammonium-based ILs were used to study the effect of different anions and cations on the interaction with PET. Natural bond orbital (NBO) analysis, atoms in molecules (AIM) and reduced density gradient (RDG) approaches were employed to make in-depth study of the nature of the interactions. It is concluded that the interaction of cations with dimer is weaker than that of anions and when the alkyl chain in the cations is replaced by an unsaturated hydrocarbon, the interaction will become stronger. Furthermore, anions play more important roles than cations in the actual interactions with dimer. When the hydrogen of methyl is replaced by hydroxyl or carboxyl, the interaction becomes weak for the amino acid anions and dimer. This work also investigates the interaction between dimer and ion pairs, with the results showing that anions play a key role in forming H-bonds, while cations mainly attack the oxygen of carbonyl and have a π-stacking interaction with dimer. The comprehensive mechanistic study will help researchers in the future to design an efficient ionic liquid catalyst and offer a better understanding of the mechanism of the degradation of PET. Co-interaction lead to glycolysis of ethylene terephthalate (PET) in ionic liquids (ILs): H-bonds and π-stacking.![]()
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Affiliation(s)
- Zhaoyang Ju
- College of Engineering
- China Agricultural University
- Beijing 100083
- P. R. China
- Key Laboratory of Green Process and Engineering
| | - Weihua Xiao
- College of Engineering
- China Agricultural University
- Beijing 100083
- P. R. China
| | - Xingmei Lu
- Key Laboratory of Green Process and Engineering
- Beijing Key Laboratory of Ionic Liquids Clean Process
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Xiaomin Liu
- Key Laboratory of Green Process and Engineering
- Beijing Key Laboratory of Ionic Liquids Clean Process
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Xiaoqian Yao
- Key Laboratory of Green Process and Engineering
- Beijing Key Laboratory of Ionic Liquids Clean Process
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Xiaochun Zhang
- Key Laboratory of Green Process and Engineering
- Beijing Key Laboratory of Ionic Liquids Clean Process
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Suojiang Zhang
- Key Laboratory of Green Process and Engineering
- Beijing Key Laboratory of Ionic Liquids Clean Process
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
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Hou Y, Zhou Z, Liu P, Wang J, Hou Q, Wen P, Wang H. A class of α-amino acids-derived multifunctional amidophosphane precatalysts: application to the highly enantio- and diastereoselective silver(I)-catalyzed 1,3-dipolar cycloaddition reaction. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.05.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Bdiri B, Dai L, Zhou ZM. Cu II -catalysed asymmetric 1,3-dipolar cycloaddition of azomethine ylides with a chiral ferrocene-derived P,N-ligand. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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13
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Zhang Y, He H, Dong K, Fan M, Zhang S. A DFT study on lignin dissolution in imidazolium-based ionic liquids. RSC Adv 2017. [DOI: 10.1039/c6ra27059j] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Co-interaction lead to dissolution of lignin in ILs: H-bonds and π–π stacking.
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Affiliation(s)
- Yaqin Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process
- Key Laboratory of Green Process and Engineering
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Hongyan He
- Beijing Key Laboratory of Ionic Liquids Clean Process
- Key Laboratory of Green Process and Engineering
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Kun Dong
- Beijing Key Laboratory of Ionic Liquids Clean Process
- Key Laboratory of Green Process and Engineering
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
| | - Maohong Fan
- Department of Chemical and Petroleum Engineering
- University of Wyoming
- Laramie
- USA
| | - Suojiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process
- Key Laboratory of Green Process and Engineering
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
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14
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Wang H, Deng Q, Zhou Z, Hu S, Liu Z, Zhou LY. Ag2CO3/CA-AA-AmidPhos Multifunctional Catalysis in the Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides. Org Lett 2016; 18:404-7. [DOI: 10.1021/acs.orglett.5b03430] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haifei Wang
- School
of Packaging and Materials
Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan Province, P.R. China
| | - Qifu Deng
- School
of Packaging and Materials
Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan Province, P.R. China
| | - Zhipeng Zhou
- School
of Packaging and Materials
Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan Province, P.R. China
| | - Shunqin Hu
- School
of Packaging and Materials
Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan Province, P.R. China
| | - Zhiguo Liu
- School
of Packaging and Materials
Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan Province, P.R. China
| | - Li-Yi Zhou
- School
of Packaging and Materials
Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan Province, P.R. China
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15
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16
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Maeda Y, Hashimoto H, Kinoshita I, Nishioka T. Chelated Bis-N-heterocyclic Carbene Platinum and Palladium Units as Tunable Components of Multinuclear Complexes. Inorg Chem 2015; 54:448-59. [DOI: 10.1021/ic502039d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuri Maeda
- Department of Chemistry, Graduate
School of Science, ‡Department of Physics, Graduate
School of Science, and §The OCU Advanced Research Institute for Natural Science
and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Hideki Hashimoto
- Department of Chemistry, Graduate
School of Science, ‡Department of Physics, Graduate
School of Science, and §The OCU Advanced Research Institute for Natural Science
and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Isamu Kinoshita
- Department of Chemistry, Graduate
School of Science, ‡Department of Physics, Graduate
School of Science, and §The OCU Advanced Research Institute for Natural Science
and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Takanori Nishioka
- Department of Chemistry, Graduate
School of Science, ‡Department of Physics, Graduate
School of Science, and §The OCU Advanced Research Institute for Natural Science
and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
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17
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Maeda Y, Hashimoto H, Kinoshita I, Nishioka T. π-back-bonding interaction depending on the bridging chain lengths of chelated N-heterocyclic carbene platinum units in heterometallic trinuclear complexes affecting their electrochemical property. Inorg Chem 2014; 53:661-3. [PMID: 24393033 DOI: 10.1021/ic402063f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Newly synthesized heterometallic trinuclear M2Pt complexes (M = Rh, Ir) containing a platinum moiety having a chelated bis-N-heterocyclic carbene (bisNHC) ligand with a variety of alkylene chain lengths of the bridging part showed two reversible reduction waves in cyclic voltammetry. Only the second reduction potentials were affected by the alkyl chain lengths, which afforded different dihedral angles between the imidazolylidene rings and the platinum coordination plane resulting in the variation of π-back-donation from the platinum center to the carbene carbon atoms.
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Affiliation(s)
- Yuri Maeda
- Department of Chemistry, Graduate School of Science, Osaka City University , Sumiyoshi-ku, Osaka 558-8585, Japan
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18
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Majhi PK, Schnakenburg G, Streubel R. From bis(imidazole-2-thion-4-yl)phosphane to a flexible P-bridged bis(NHC) ligand and its silver complex. Dalton Trans 2014; 43:16673-9. [DOI: 10.1039/c4dt02479f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of the first P(v)-bridged bis(NHC) ligand 7 was achieved via deprotonation of P(v)-functionalized bis(imidazolium) salt 6, which was obtained via oxidative desulfurization of bis(imidazole-2-thion-4-yl)phosphane 2.
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Affiliation(s)
- Paresh Kumar Majhi
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- 53121 Bonn, Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- 53121 Bonn, Germany
| | - Rainer Streubel
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- 53121 Bonn, Germany
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Hameury S, de Frémont P, R. Breuil PA, Olivier-Bourbigou H, Braunstein P. Synthesis and characterization of oxygen-functionalised-NHC silver(i) complexes and NHC transmetallation to nickel(ii). Dalton Trans 2014; 43:4700-10. [DOI: 10.1039/c3dt52773e] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
New silver(i) complexes bearing alcohol- or ether-functionalized NHCs were synthesized and characterized by X-ray diffraction. Their NHC transmetallation ability was assessed and gave rise to a Ni(ii) bis(NHC) complex in the case of the ether-functionalisation.
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Affiliation(s)
- Sophie Hameury
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- 67081 Strasbourg, France
| | - Pierre de Frémont
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- 67081 Strasbourg, France
| | | | | | - Pierre Braunstein
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- 67081 Strasbourg, France
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