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Gao S, Cao CQ, Liu ZJ, Yao ZJ. Half-Sandwich Iridium Complexes: A Recyclable and Stable Catalyst for Dehydrogenation of Alcohols to Carboxylic Acids. Inorg Chem 2024; 63:13311-13320. [PMID: 38977684 DOI: 10.1021/acs.inorgchem.4c01066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
A series of acylhydrazone-based N,N-chelate half-sandwich iridium complexes have been synthesized through a facile route in good yields. The dehydrogenation of a series of aromatic and aliphatic primary alcohols to corresponding carboxylic acids has been accomplished catalyzed by the prepared air stable iridium complexes under mild reaction conditions. Carboxylic acids were obtained in high yields under open flask condition with broad substrates and good tolerance to sensitive functional groups. Such a half-sandwich iridium catalyst system exhibited high catalytic activity and stability, and a high TOF of 316.7 h-1 could be achieved with a catalyst loading as low as 0.05 mol %. Furthermore, the sustainable catalyst could be reused at least five times without obviously losing its activity, highlighting its potential application in industry. Molecular structure of iridium complex 1 was confirmed by single-crystal X-ray analysis.
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Affiliation(s)
- Song Gao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Chuan-Qi Cao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Zhen-Jiang Liu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Zi-Jian Yao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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2
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Chen Y, Cui T, Chen H, Li Zheng X, Fu H, Li R. Pyrazole-pyridine-pyrazole (NNN) ruthenium(II) complex catalyzed acceptorless dehydrogenation of alcohols to aldehydes. Dalton Trans 2023; 52:12368-12377. [PMID: 37593848 DOI: 10.1039/d3dt01430d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
A new series of cationic ruthenium(II) complexes, [RuCl(PPh3)2(κ3-NNN-L1)]Cl (1), [RuH(PPh3)2(κ3-NNN-L2)]Cl (2), and [RuH(PPh3)2(κ3-NNN-L3)]Cl (3), bearing a 2,6-bis (1-R-5-methyl-pyrazol-3-yl) pyridine ligand (L1: R = H, L2: R = C6H4-p-CF3, L3: R = C6H4-p-OCH3), were synthesized and characterized with NMR, HRMS, and single-crystal X-ray diffraction. Their catalytic application was investigated in the acceptorless dehydrogenation (AD) of primary alcohols. Complex 1 outperformed 2 and 3 in terms of the selectivity towards the aldehydes, and provided the aldehydes with a yield of up to 99%, with good functional group tolerance under mild conditions. In addition, the only by-product of the reaction was dihydrogen, which can be collected as clean energy, and the reaction meets the requirements of environment-friendly chemistry. Complex 1 also proved to be a promising catalyst in the sequential AD/condensation reaction between the primary and secondary alcohols, affording α,β-unsaturated ketones in moderate to good selectivity.
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Affiliation(s)
- Yinyin Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
| | - Tianhua Cui
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
| | - Hua Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
| | - Xue Li Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
| | - Haiyan Fu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
| | - Ruixiang Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
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3
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Wang JM, Zhu QY, Lee JH, Woo TG, Zhang YX, Jang WD, Kim TK. Asymmetric gradient orbital interaction of hetero-diatomic active sites for promoting C - C coupling. Nat Commun 2023; 14:3808. [PMID: 37369676 DOI: 10.1038/s41467-023-39580-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 06/20/2023] [Indexed: 06/29/2023] Open
Abstract
Diatomic-site catalysts (DACs) garner tremendous attention for selective CO2 photoreduction, especially in the thermodynamical and kinetical mechanism of CO2 to C2+ products. Herein, we first engineer a novel Zn-porphyrin/RuCu-pincer complex DAC (ZnPor-RuCuDAC). The heteronuclear ZnPor-RuCuDAC exhibits the best acetate selectivity (95.1%), while the homoatomic counterparts (ZnPor-Ru2DAC and ZnPor-Cu2DAC) present the best CO selectivity. In-situ spectroscopic measurements reveal that the heteronuclear Ru-Cu sites easily appear C1 intermediate coupling. The in-depth analyses confirm that due to the strong gradient orbital coupling of Ru4d-Cu3d resonance, two formed *CO intermediates of Ru-Cu heteroatom show a significantly weaker electrostatic repulsion for an asymmetric charge distribution, which result from a side-to-side absorption and narrow dihedral angle distortion. Moreover, the strongly overlapped Ru/Cu-d and CO molecular orbitals split into bonding and antibonding orbitals easily, resulting in decreasing energy splitting levels of C1 intermediates. These results collectively augment the collision probability of the two *CO intermediates on heteronuclear DACs. This work first provides a crucial perspective on the symmetry-forbidden coupling mechanism of C1 intermediates on diatomic sites.
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Affiliation(s)
- Jin Ming Wang
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Qin Yao Zhu
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jeong Heon Lee
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Tae Gyun Woo
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Yue Xing Zhang
- College of Chemistry and Chemical Engineering, Dezhou University, Dezhou, 253023, China
| | - Woo-Dong Jang
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Tae Kyu Kim
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea.
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4
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Paul T, Saikia PP, Borah D, Mahanta N, Baruah A, Borah JM, Saikia BJ, Raidongia K, Gogoi RK, Gogoi R. Ni(OH)
2
nanoparticles as a recyclable catalyst in acceptorless dehydrogenation of alcohols to acids/acid salts under aerobic conditions. ChemistrySelect 2023. [DOI: 10.1002/slct.202204713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- Tumpa Paul
- Department of Chemistry Darrang College 784001 Tezpur India
| | | | | | | | - Arabinda Baruah
- Department of Chemistry Gauhati University 781014 Guwahati India
| | | | | | | | | | - Raktim Gogoi
- Department of Chemistry IIT Guwahati 781039 Guwahati India
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5
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Zeolitic Imidazolate Framework-8 as an Efficient and Facile Heterogeneous Catalyst for the Acceptorless Alcohol Dehydrogenation to Carboxylates. J Catal 2022. [DOI: 10.1016/j.jcat.2022.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Kar S, Milstein D. Oxidation of Organic Compounds Using Water as the Oxidant with H 2 Liberation Catalyzed by Molecular Metal Complexes. Acc Chem Res 2022; 55:2304-2315. [PMID: 35881940 PMCID: PMC9386904 DOI: 10.1021/acs.accounts.2c00328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Oxidation reactions of organic compounds play a central role in both industrial chemical and material synthesis as well as in fine chemical and pharmaceutical synthesis. While traditional laboratory-scale oxidative syntheses have relied on the use of strong oxidizers, modern large-scale oxidation processes preferentially utilize air or pure O2 as an oxidant, with other oxidants such as hydrogen peroxide, nitric acid, and aqueous chlorine solution also being used in some processes. The use of molecular oxygen or air as an oxidant has been very attractive in recent decades because of the abundance of air and the lack of wasteful byproduct generation. Nevertheless, the use of high-pressure air or, in particular, pure oxygen can lead to serious safety concerns with improper handling and also necessitates the use of sophisticated high-pressure reactors for the processes.Several research groups, including ours, have investigated in recent times the possibility of carrying out catalytic oxidation reactions using water as the formal oxidant, with no added conventional oxidants. Along with the abundant availability of water, these processes also generate dihydrogen gas as the reaction coproduct, which is a highly valuable fuel. Several well-defined molecular metal complexes have been reported in recent years to catalyze these unusual oxidative reactions with water. A ruthenium bipyridine-based PNN pincer complex was reported by us to catalyze the oxidation of primary alcohols to carboxylate salts with alkaline water along with H2 liberation, followed by reports by other groups using other complexes as catalysts. At the same time, ruthenium-, iridium-, and rhodium-based complexes have been reported to catalyze aldehyde oxidation to carboxylic acids using water. Our group has combined the catalytic aqueous alcohol and aldehyde oxidation activity of a ruthenium complex to achieve the oxidation of biomass-derived renewable aldehydes such as furfural and 5-hydroxymethylfurfural (HMF) to furoic acid and furandicarboxylic acid (FDCA), respectively, using alkaline water as the oxidant, liberating H2. Ruthenium complexes with an acridine-based PNP ligand have also been employed by our group for the catalytic oxidation of amines to the corresponding lactams, or to carboxylic acids via a deaminative route, using water. Similarly, we also reported molecular complexes for the catalytic Markovnikov oxidation of alkenes to ketones using water, similar to Wacker-type oxidation, which, however, does not require any terminal oxidant and produces H2 as the coproduct. At the same time, the oxidation of enol ethers to the corresponding esters with water has also been reported. This account will highlight these recent advances where water was used as an oxidant to carry out selective oxidation reactions of organic compounds, catalyzed by well-defined molecular complexes, with H2 liberation. The oxidation of alcohols, aldehydes, amines, alkenes, and enol ethers will be discussed to provide an outlook toward other functional groups' oxidation. We hope that this will aid researchers in devising other oxidative dehydrogenative catalytic systems using water, complementing traditional oxidative processes involving strong oxidants and molecular oxygen.
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7
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Tabasi NS, Genç S, Gülcemal D. Tuning the selectivity in iridium-catalyzed acceptorless dehydrogenative coupling of primary alcohols. Org Biomol Chem 2022; 20:6582-6592. [PMID: 35913502 DOI: 10.1039/d2ob01142e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An acceptorless dehydrogenative coupling of primary alcohols to carboxylic acids/carboxylates, esters, and Guerbet alcohols (via both homo- and cross-β-alkylation of the alcohols) in the presence of an N-heterocyclic carbene iridium(I) catalyst was developed under aerobic conditions. The product selectivity can be easily tuned among the products with a single catalyst through simple modification of the reaction conditions, such as the catalyst and base amounts, the choice of base, and the reaction temperature.
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Affiliation(s)
- Nihal S Tabasi
- Ege University, Chemistry Department, 35100 Bornova, Izmir, Turkey.
| | - Sertaç Genç
- Ege University, Chemistry Department, 35100 Bornova, Izmir, Turkey.
| | - Derya Gülcemal
- Ege University, Chemistry Department, 35100 Bornova, Izmir, Turkey.
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8
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Zhou J, Luo S, Liu H, Xue P. Phosphine-free ruthenium complexes supported by a pincer ligand bearing 1,2-dihydropyrimidine for Oppenauer-type oxidation of secondary alcohols. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Chen S, Liao M, Li X, Li R, Zhang J, Zhang Y, Peng T. Metal center regulation of the porphyrin unit in covalent organic polymers for boosting the photocatalytic CO 2 reduction activity. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01473d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Regulating the porphyrin's metal center of metalloporphyrin(MPor)/Ru(ii)-pincer complex(RuN3) covalent organic polymers (COPs) effectively boosted the CO2 photoreduction by promoting charge separation and sacrificial electron donor oxidation.
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Affiliation(s)
- Shengtao Chen
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Wuhan University, Wuhan 430072, PR China
| | - Meijing Liao
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Xinming Li
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Wuhan University, Wuhan 430072, PR China
| | - Renjie Li
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Wuhan University, Wuhan 430072, PR China
| | - Jing Zhang
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Wuhan University, Wuhan 430072, PR China
| | - Yuexing Zhang
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Tianyou Peng
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Wuhan University, Wuhan 430072, PR China
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10
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Chen S, Li K, Liu H, Zhang J, Peng T. Efficient CO2 reduction over a Ru-pincer complex/TiO2 hybrid photocatalyst via direct Z-scheme mechanism. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01840j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solar-driven CO2 conversion to hydrocarbon fuels is a feasible way to solve the increasingly serious energy problem and greenhouse effect. Herein, we fabricate a novel hybrid photocatalyst for CO2 reduction...
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11
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Li B, Fang J, Xu D, Zhao H, Zhu H, Zhang F, Dong Z. Atomically Dispersed Co Clusters Anchored on N-doped Carbon Nanotubes for Efficient Dehydrogenation of Alcohols and Subsequent Conversion to Carboxylic Acids. CHEMSUSCHEM 2021; 14:4536-4545. [PMID: 34370902 DOI: 10.1002/cssc.202101330] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/08/2021] [Indexed: 06/13/2023]
Abstract
The catalytic dehydrogenation of readily available alcohols to high value-added carbonyl compounds is a research hotspot with scientific significance. Most of the current research about this reaction is performed with noble metal-based homogeneous catalysts of high price and poor reusability. Herein, highly dispersed Co-cluster-decorated N-doped carbon nanotubes (Co/N-CNTs) were fabricated via a facile strategy and used for the dehydrogenation of alcohols with high efficiency. Various characterization techniques confirmed the presence of metallic Co clusters with almost atomic dispersion, and the N-doped carbon supports also enhanced the catalytic activity of Co clusters in the dehydrogenation reaction. Aldehydes as dehydrogenation products were further transformed in situ to carboxylic acids through a Cannizzaro-type pathway under alkaline conditions. The reaction pathway of the dehydrogenation of alcohols was clearly confirmed by theoretical calculations. This work should provide an effective and simple approach for the accurate design and synthesis of small Co-clusters catalysts for the efficient dehydrogenation-based transformation of alcohols to carboxylic acids under mild reaction conditions.
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Affiliation(s)
- Boyang Li
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jian Fang
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Dan Xu
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Hong Zhao
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Hanghang Zhu
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Fengwei Zhang
- Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, P. R. China
| | - Zhengping Dong
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
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12
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Trincado M, Bösken J, Grützmacher H. Homogeneously catalyzed acceptorless dehydrogenation of alcohols: A progress report. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213967] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Oroujzadeh N, Baradaran Z, Sedrpoushan A. An efficient heterogeneous Cu(I) complex for the catalytic oxidation of alcohols and sulfides: synthesis, characterization, and investigation of the catalyst activity. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1950698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Nasrin Oroujzadeh
- Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
| | - Zahra Baradaran
- Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
| | - Alireza Sedrpoushan
- Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
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14
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Anil AG, Sunil Kumar Naik T, Subramanian S, Ramamurthy PC. A novel non-enzymatic urea sensor based on the nickel complex of a benzimidazoyl pyridine derivative. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115062] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Structural diversity and luminescent properties of coordination complexes obtained from trivalent lanthanide ions with the ligands: tris((1H-benzo[d]imidazol-2-yl)methyl)amine and 2,6-bis(1H-benzo[d]imidazol-2-yl)pyridine. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213587] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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16
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Arora V, Narjinari H, Nandi PG, Kumar A. Recent advances in pincer-nickel catalyzed reactions. Dalton Trans 2021; 50:3394-3428. [PMID: 33595564 DOI: 10.1039/d0dt03593a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Organometallic catalysts have played a key role in accomplishing numerous synthetically valuable organic transformations that are either otherwise not possible or inefficient. The use of precious, sparse and toxic 4d and 5d metals are an apparent downside of several such catalytic systems despite their immense success over the last several decades. The use of complexes containing Earth-abundant, inexpensive and less hazardous 3d metals, such as nickel, as catalysts for organic transformations has been an emerging field in recent times. In particular, the versatile nature of the corresponding pincer-metal complexes, which offers great control of their reactivity via countless variations, has garnered great interest among organometallic chemists who are looking for greener and cheaper alternatives. In this context, the current review attempts to provide a glimpse of recent developments in the chemistry of pincer-nickel catalyzed reactions. Notably, there have been examples of pincer-nickel catalyzed reactions involving two electron changes via purely organometallic mechanisms that are strikingly similar to those observed with heavier Pd and Pt analogues. On the other hand, there have been distinct differences where the pincer-nickel complexes catalyze single-electron radical reactions. The applicability of pincer-nickel complexes in catalyzing cross-coupling reactions, oxidation reactions, (de)hydrogenation reactions, dehydrogenative coupling, hydrosilylation, hydroboration, C-H activation and carbon dioxide functionalization has been reviewed here from synthesis and mechanistic points of view. The flurry of global pincer-nickel related activities offer promising avenues in catalyzing synthetically valuable organic transformations.
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Affiliation(s)
- Vinay Arora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India. and Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
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17
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Abstract
AbstractOxidation of primary alcohols to carboxylic acids is a fundamental transformation in organic chemistry, yet despite its simplicity, extensive use, and relationship to pH, it remains a subject of active research for synthetic organic chemists. Since 2013, a great number of new methods have emerged that utilize transition-metal compounds as catalysts for acceptorless dehydrogenation of alcohols to carboxylates. The interest in this reaction is explained by its atom economy, which is in accord with the principles of sustainability and green chemistry. Therefore, the methods for the direct synthesis of carboxylic acids from alcohols is ripe for a modern survey, which we provide in this review.1 Introduction2 Thermodynamics of Primary Alcohol Oxidation3 Oxometalate Oxidation4 Transfer Dehydrogenation5 Acceptorless Dehydrogenation6 Electrochemical Methods7 Outlook
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18
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Yazdani E, Heydari A. Acceptorless dehydrogenative oxidation of primary alcohols to carboxylic acids and reduction of nitroarenes via hydrogen borrowing catalyzed by a novel nanomagnetic silver catalyst. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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19
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Toyooka G, Fujita KI. Synthesis of Dicarboxylic Acids from Aqueous Solutions of Diols with Hydrogen Evolution Catalyzed by an Iridium Complex. CHEMSUSCHEM 2020; 13:3820-3824. [PMID: 32449604 DOI: 10.1002/cssc.202001052] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/20/2020] [Indexed: 06/11/2023]
Abstract
A catalytic system for the synthesis of dicarboxylic acids from aqueous solutions of diols accompanied by the evolution of hydrogen was developed. An iridium complex bearing a functional bipyridonate ligand with N,N-dimethylamino substituents exhibited a high catalytic performance for this type of dehydrogenative reaction. For example, adipic acid was synthesized from an aqueous solution of 1,6-hexanediol in 97 % yield accompanied by the evolution of four equivalents of hydrogen by the present catalytic system. It should be noted that the simultaneous production of industrially important dicarboxylic acids and hydrogen, which is useful as an energy carrier, was achieved. In addition, the selective dehydrogenative oxidation of vicinal diols to give α-hydroxycarboxylic acids was also accomplished.
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Affiliation(s)
- Genki Toyooka
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Ken-Ichi Fujita
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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20
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Abstract
Our planet urgently needs sustainable solutions to alleviate the anthropogenic global warming and climate change. Homogeneous catalysis has the potential to play a fundamental role in this process, providing novel, efficient, and at the same time eco-friendly routes for both chemicals and energy production. In particular, pincer-type ligation shows promising properties in terms of long-term stability and selectivity, as well as allowing for mild reaction conditions and low catalyst loading. Indeed, pincer complexes have been applied to a plethora of sustainable chemical processes, such as hydrogen release, CO2 capture and conversion, N2 fixation, and biomass valorization for the synthesis of high-value chemicals and fuels. In this work, we show the main advances of the last five years in the use of pincer transition metal complexes in key catalytic processes aiming for a more sustainable chemical and energy production.
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21
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Pradhan DR, Pattanaik S, Kishore J, Gunanathan C. Cobalt-Catalyzed Acceptorless Dehydrogenation of Alcohols to Carboxylate Salts and Hydrogen. Org Lett 2020; 22:1852-1857. [DOI: 10.1021/acs.orglett.0c00193] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Deepak Ranjan Pradhan
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
| | - Sandip Pattanaik
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
| | - Jugal Kishore
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
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22
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Budweg S, Junge K, Beller M. Catalytic oxidations by dehydrogenation of alkanes, alcohols and amines with defined (non)-noble metal pincer complexes. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00699h] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present review highlights the latest developments in the field of transition metal-catalysed oxidations, in particular C–C–, C–O– and C–N-bond dehydrogenations.
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Affiliation(s)
- Svenja Budweg
- Leibniz-Institut für Katalyse e.V
- Rostock 18059
- Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V
- Rostock 18059
- Germany
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23
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Borah D, Saha B, Sarma B, Das P. A cyclometalated Ir(III)-NHC complex as a recyclable catalyst for acceptorless dehydrogenation of alcohols to carboxylic acids. Dalton Trans 2020; 49:16866-16876. [PMID: 33179681 DOI: 10.1039/d0dt02341h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this work, we have synthesized two new [C, C] cyclometalated Ir(iii)-NHC complexes, [IrCp*(C∧C:NHC)Br](1a,b), [Cp* = pentamethylcyclopentadienyl; NHC = (2-flurobenzyl)-1-(4-methoxyphenyl)-1H-imidazoline-2-ylidene (a); (2-flurobenzyl)-1-(4-formylphenyl)-1H-imidazoline-2-ylidene (b)] via intramolecular C-H bond activation. The molecular structure of complex 1a was determined by X-ray single crystal analysis. The catalytic potentials of the complexes were explored for acceptorless dehydrogenation of alcohols to carboxylic acids with concomitant hydrogen gas evolution. Under similar experimental conditions, complex 1a was found to be slightly more efficient than complex 1b. Using 0.1 mol% of complex 1a, good-to-excellent yields of carboxylic acids/carboxylates have been obtained for a wide range of alcohols, both aliphatic and aromatic, including those involving heterocycles, in a short reaction time with a low loading of catalyst. Remarkably, our method can produce benzoic acid from benzyl alcohol on a gram scale with a catalyst-to-substrate ratio as low as 1 : 5000 and exhibit a TON of 4550. Furthermore, the catalyst could be recycled at least three times without losing its activity. A mechanism has been proposed based on controlled experiments and in situ NMR study.
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Affiliation(s)
- Dhrubajit Borah
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam 786004, India.
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24
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Dutta M, Das K, Prathapa SJ, Srivastava HK, Kumar A. Selective and high yield transformation of glycerol to lactic acid using NNN pincer ruthenium catalysts. Chem Commun (Camb) 2020; 56:9886-9889. [DOI: 10.1039/d0cc02884c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sterically less hindered 2,6-bis(benzimidazol-2-yl)pyridine based pincer–ruthenium complex has been used here to accomplish the catalytic conversion of glycerol selectively to lactic acid in high yield.
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Affiliation(s)
- Moumita Dutta
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati – 781039
- India
| | - Kanu Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati – 781039
- India
| | | | - Hemant Kumar Srivastava
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research Guwahati
- Guwahati – 781101
- India
| | - Akshai Kumar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati – 781039
- India
- Centre for Nanotechnology
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25
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Highly Efficient N-Heterocyclic Carbene/Ruthenium Catalytic Systems for the Acceptorless Dehydrogenation of Alcohols to Carboxylic Acids: Effects of Ancillary and Additional Ligands. Catalysts 2019. [DOI: 10.3390/catal10010010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The transition-metal-catalyzed alcohol dehydrogenation to carboxylic acids has been identified as an atom-economical and attractive process. Among various catalytic systems, Ru-based systems have been the most accessed and investigated ones. With our growing interest in the discovery of new Ru catalysts comprising N-heterocyclic carbene (NHC) ligands for the dehydrogenative reactions of alcohols, we designed and prepared five NHC/Ru complexes ([Ru]-1–[Ru]-5) bearing different ancillary NHC ligands. Moreover, the effects of ancillary and additional ligands on the alcohol dehydrogenation with KOH were thoroughly explored, followed by the screening of other parameters. Accordingly, a highly active catalytic system, which is composed of [Ru]-5 combined with an additional NHC precursor L5, was discovered, affording a variety of acid products in a highly efficient manner. Gratifyingly, an extremely low Ru loading (125 ppm) and the maximum TOF value until now (4800) were obtained.
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26
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Casas F, Trincado M, Rodriguez‐Lugo R, Baneerje D, Grützmacher H. A Diaminopropane Diolefin Ru(0) Complex Catalyzes Hydrogenation and Dehydrogenation Reactions. ChemCatChem 2019. [DOI: 10.1002/cctc.201901739] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Fernando Casas
- Department of Chemistry and Applied BiosciencesETH Zürich Zürich 8093 Switzerland
| | - Monica Trincado
- Department of Chemistry and Applied BiosciencesETH Zürich Zürich 8093 Switzerland
| | - Rafael Rodriguez‐Lugo
- Laboratorio de BioinorgánicaCentro de Química Instituto Venezolano de Investigaciones Científicas (IVIC) Caracas 1020 A Venezuela
| | - Dipshikha Baneerje
- Department of Chemistry and Applied BiosciencesETH Zürich Zürich 8093 Switzerland
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied BiosciencesETH Zürich Zürich 8093 Switzerland
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27
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Cherepakhin V, Williams TJ. Catalyst Evolution in Ruthenium-Catalyzed Coupling of Amines and Alcohols. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03679] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Valeriy Cherepakhin
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Travis J. Williams
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
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28
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Awasthi MK, Singh SK. Ruthenium Catalyzed Dehydrogenation of Alcohols and Mechanistic Study. Inorg Chem 2019; 58:14912-14923. [DOI: 10.1021/acs.inorgchem.9b02691] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mahendra K. Awasthi
- Catalysis Group, Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore 453552, India
| | - Sanjay K. Singh
- Catalysis Group, Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore 453552, India
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29
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Liu HM, Jian L, Li C, Zhang CC, Fu HY, Zheng XL, Chen H, Li RX. Dehydrogenation of Alcohols to Carboxylic Acid Catalyzed by in Situ-Generated Facial Ruthenium-CPP Complex. J Org Chem 2019; 84:9151-9160. [DOI: 10.1021/acs.joc.9b01100] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Hui-Min Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Lei Jian
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Chao Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Chun-Chun Zhang
- Analytical & Testing Center, Sichuan University, Chengdu 610064, Sichuan, P. R. China
| | - Hai-Yan Fu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xue-Li Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Hua Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Rui-Xiang Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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30
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Wang Q, Guo CH, Zhang X, Zhu M, Jiao H, Wu HS. Mechanisms and Activity of 1-Phenylethanol Dehydrogenation Catalyzed by Bifunctional NHC-Ir III
Complex. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Qiong Wang
- Key Laboratory of Magnetic Molecules; Magnetic Information Materials Ministry of Education; The School of Chemical and Material Science; Shanxi Normal University; 041004 Linfen China
| | - Cai-Hong Guo
- Key Laboratory of Magnetic Molecules; Magnetic Information Materials Ministry of Education; The School of Chemical and Material Science; Shanxi Normal University; 041004 Linfen China
| | - Xiang Zhang
- Key Laboratory of Magnetic Molecules; Magnetic Information Materials Ministry of Education; The School of Chemical and Material Science; Shanxi Normal University; 041004 Linfen China
| | - Mi Zhu
- Key Laboratory of Magnetic Molecules; Magnetic Information Materials Ministry of Education; The School of Chemical and Material Science; Shanxi Normal University; 041004 Linfen China
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Hai-Shun Wu
- Key Laboratory of Magnetic Molecules; Magnetic Information Materials Ministry of Education; The School of Chemical and Material Science; Shanxi Normal University; 041004 Linfen China
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31
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Gong D, Hu B, Chen D. Bidentate Ru(ii)-NC complexes as catalysts for the dehydrogenative reaction from primary alcohols to carboxylic acids. Dalton Trans 2019; 48:8826-8834. [DOI: 10.1039/c9dt01414d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Complex 1 is active for alcohol dehydrogenative reactions, and two critical intermediates were isolated and characterized.
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Affiliation(s)
- Dawei Gong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemical Engineering & Technology
- Harbin Institute of Technology
- Harbin 150001
- People's Republic of China
| | - Bowen Hu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemical Engineering & Technology
- Harbin Institute of Technology
- Harbin 150001
- People's Republic of China
| | - Dafa Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemical Engineering & Technology
- Harbin Institute of Technology
- Harbin 150001
- People's Republic of China
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32
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Khajehzadeh M, Rajabi M, Rahmaniasl S. Synthesis, spectroscopic (UV–vis, FT-IR and NMR), solubility in various solvents, X–ray, NBO, NLO and FMO analysis of (L1) and [(L1)PdCl2] complex: A comprehensive experimental and computational study. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.07.084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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33
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Wang ZQ, Tang XS, Yang ZQ, Yu BY, Wang HJ, Sang W, Yuan Y, Chen C, Verpoort F. Highly active bidentate N-heterocyclic carbene/ruthenium complexes performing dehydrogenative coupling of alcohols and hydroxides in open air. Chem Commun (Camb) 2019; 55:8591-8594. [DOI: 10.1039/c9cc03519b] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A highly active and robust bidentate NHC/Ru complex for the acceptorless dehydrogenative coupling of alcohols and hydroxides in open air.
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Affiliation(s)
- Zhi-Qin Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
- School of Materials Science and Engineering
| | - Xiao-Sheng Tang
- Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education) College of Optoelectronic Engineering
- Chongqing University
- Chongqing 400044
- P. R. China
| | - Zhao-Qi Yang
- School of Pharmaceutical Sciences
- Jiangnan University
- Wuxi 214122
- China
| | - Bao-Yi Yu
- Key Laboratory of Urban Agriculture (North China)
- Ministry of Agriculture
- Beijing University of Agriculture
- Beijing 102206
- P. R. China
| | - Hua-Jing Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Wei Sang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
- School of Materials Science and Engineering
| | - Ye Yuan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Cheng Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Francis Verpoort
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
- National Research Tomsk Polytechnic University
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34
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Simó-Vicens R, Bomholtz SH, Sørensen US, Bentzen BH. 2,6-Bis(2-Benzimidazolyl)Pyridine (BBP) Is a Potent and Selective Inhibitor of Small Conductance Calcium-Activated Potassium (SK) Channels. Front Pharmacol 2018; 9:1409. [PMID: 30559671 PMCID: PMC6287599 DOI: 10.3389/fphar.2018.01409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/16/2018] [Indexed: 11/13/2022] Open
Abstract
A variety of polycyclic pyridines have been proposed as inhibitors of the small conductance calcium-activated potassium (SK) channel. To this group belongs 2,6-bis(2-benzimidazolyl)pyridine (BBP), a commercially and readily available small organic compound which has earlier been described in a broad range of chemical and biological uses. Here, we show how BBP can also be used as a potent and specific SK channel blocker in vitro. The potency of BBP was measured using automatic patch clamp on all three SK channel subtypes, resulting in similar IC50 of 0.4 μM. We also assessed the selectivity of BBP on a panel of calcium-activated and voltage-activated potassium channels using two-electrode voltage clamp, automatic and manual patch clamp. BBP did not have any effect on IK, Kir2.1, Kir3.1+Kir3.4, Kv1.5, Kv4.3/KCHIP2 and Kv7.1/KCNE1 currents and was 4.8-fold and 46-fold more potent on all SK channel subtypes vs. BK and hERG channels, respectively. Moreover, we were able to identify H491 as a critical amino acid for the pharmacological effect of BBP on the SK channel. From a medicinal chemistry perspective, BBP could be used as a starting point for the design of new and improved SK inhibitors.
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Affiliation(s)
- Rafel Simó-Vicens
- Cardiovascular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Acesion Pharma, Copenhagen, Denmark
| | - Sofia H Bomholtz
- Cardiovascular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Acesion Pharma, Copenhagen, Denmark
| | | | - Bo H Bentzen
- Cardiovascular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Acesion Pharma, Copenhagen, Denmark
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35
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Monda F, Madsen R. Zinc Oxide-Catalyzed Dehydrogenation of Primary Alcohols into Carboxylic Acids. Chemistry 2018; 24:17832-17837. [PMID: 30273451 DOI: 10.1002/chem.201804402] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 01/21/2023]
Abstract
Zinc oxide has been developed as a catalyst for the dehydrogenation of primary alcohols into carboxylic acids and hydrogen gas. The reaction is performed in mesitylene solution in the presence of potassium hydroxide, followed by workup with hydrochloric acid. The transformation can be applied to both benzylic and aliphatic primary alcohols and the catalytically active species was shown to be a homogeneous compound by a hot filtration test. Dialkylzinc and strongly basic zinc salts also catalyze the dehydrogenation with similar results. The mechanism is believed to involve the formation of a zinc alkoxide which degrades into the aldehyde and a zinc hydride. The latter reacts with the alcohol to form hydrogen gas and regenerate the zinc alkoxide. The degradation of a zinc alkoxide into the aldehyde upon heating was confirmed experimentally. The aldehyde can then undergo a Cannizzaro reaction or a Tishchenko reaction, which in the presence of hydroxide leads to the carboxylic acid.
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Affiliation(s)
- Fabrizio Monda
- Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
| | - Robert Madsen
- Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
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36
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Singh A, Singh SK, Saini AK, Mobin SM, Mathur P. Facile oxidation of alcohols to carboxylic acids in basic water medium by employing ruthenium picolinate cluster as an efficient catalyst. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4574] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ajeet Singh
- Discipline of Chemistry; Simrol, Khandwa Road Indore 453552 India
| | - Sandip K. Singh
- Discipline of Chemistry; Simrol, Khandwa Road Indore 453552 India
| | - Anoop K. Saini
- Discipline of Chemistry; Simrol, Khandwa Road Indore 453552 India
| | - Shaikh M. Mobin
- Discipline of Chemistry; Simrol, Khandwa Road Indore 453552 India
- Discipline of Biosciences and Bio-Medical Engineering; Simrol, Khandwa Road Indore 453552 India
- Discipline of Metallurgy Engineering and Materials Science; Indian Institute of Technology Indore; Simrol, Khandwa Road Indore 453552 India
| | - Pradeep Mathur
- Discipline of Chemistry; Simrol, Khandwa Road Indore 453552 India
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37
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Zhuang C, Wang J, Zhou S, Peng T, Zhang J. Ruthenium(II) Pincer Complex Bearing N′NN′- and ONO-Type Ligands as a Titania Sensitizer for Efficient and Stable Visible-Light-Driven Hydrogen Production. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Chuangsheng Zhuang
- College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 P. R. China
| | - Jinming Wang
- College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 P. R. China
| | - Shengyin Zhou
- Hubei Provincial Supervision and; Inspection Research Institute for Products Quality; Wuhan 430061 P. R. China
| | - Tianyou Peng
- College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 P. R. China
| | - Jing Zhang
- College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 P. R. China
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38
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Cherepakhin V, Williams TJ. Iridium Catalysts for Acceptorless Dehydrogenation of Alcohols to Carboxylic Acids: Scope and Mechanism. ACS Catal 2018; 8:3754-3763. [PMID: 30288338 DOI: 10.1021/acscatal.8b00105] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We introduce iridium-based conditions for the conversion of primary alcohols to potassium carboxylates (or carboxylic acids) in the presence of potassium hydroxide and either [Ir(2-PyCH2(C4H5N2))(COD)]OTf (1) or [Ir(2-PyCH2PBu2 t)(COD)]OTf (2). The method provides both aliphatic and benzylic carboxylates in high yield and with outstanding functional group tolerance. We illustrate the application of this method to a diverse variety of primary alcohols, including those involving heterocycles and even free amines. Complex 2 reacts with alcohols to form crystallographically-characterized catalytic intermediates [IrH(η 1,η 3-C8H12)(2-PyCH2PtBu2)] (2a) and [Ir2H3(CO)(2-PyCH2PtBu2){μ-(C5H3N)CH2PtBu2}] (2c). The unexpected similarities in reactivities of 1 and 2 in this reaction, along with synthetic studies on several of our iridium intermediates, enable us to form a general proposal of the mechanisms of catalyst activation that govern the disparate reactivities of 1 and 2, respectively in glycerol and formic acid dehydrogenation. Moreover, careful analysis of the organic intermediates in the oxidation sequence enable new insights into the role of Tishchenko and Cannizzaro reactions in the overall oxidation.
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Affiliation(s)
- Valeriy Cherepakhin
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Travis J. Williams
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
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39
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Li L, Luo Q, Cui H, Li R, Zhang J, Peng T. Air-stable Ruthenium(II)-NNN Pincer Complexes for the Efficient Coupling of Aromatic Diamines and Alcohols to 1H
-benzo[d
]imidazoles with the Liberation of H2. ChemCatChem 2018. [DOI: 10.1002/cctc.201800017] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Lin Li
- College of Chemistry&Molecular Sciences; Wuhan University; Wuhan 430072 P.R. China
| | - Qi Luo
- College of Chemistry&Molecular Sciences; Wuhan University; Wuhan 430072 P.R. China
| | - Huahua Cui
- College of Chemistry&Molecular Sciences; Wuhan University; Wuhan 430072 P.R. China
| | - Renjie Li
- College of Chemistry&Molecular Sciences; Wuhan University; Wuhan 430072 P.R. China
| | - Jing Zhang
- College of Chemistry&Molecular Sciences; Wuhan University; Wuhan 430072 P.R. China
| | - Tianyou Peng
- College of Chemistry&Molecular Sciences; Wuhan University; Wuhan 430072 P.R. China
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40
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Hu P, Milstein D. Conversion of Alcohols to Carboxylates Using Water and Base with H2 Liberation. TOP ORGANOMETAL CHEM 2018. [DOI: 10.1007/3418_2018_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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41
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Xiang W, Li L, Dai Z, Meng X, Li R, Zhang J, Peng T. TiO 2 modified with a Ru( ii)–N′NN′ 8-hydroxyquinolyl complex for efficient gaseous photoreduction of CO 2. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00158h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A rare example of a Ru(ii) pincer complex for the efficient photoreduction of CO2 to CO/CH4 in a gaseous system was developed.
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Affiliation(s)
- Wenjing Xiang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Lin Li
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Zengjin Dai
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Xianggao Meng
- Key Laboratory of Pesticide and Chemical Biology
- Ministry of Education
- School of Chemistry
- Central China Normal University
- Wuhan 430079
| | - Renjie Li
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Jing Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Tianyou Peng
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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42
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Shao JY, Zhong YW. pH value-dependent electronic absorption and Ru(III/II) potential of bis-tridentate pincer ruthenium complexes. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.04.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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43
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Ghalehshahi HG, Madsen R. Silver-Catalyzed Dehydrogenative Synthesis of Carboxylic Acids from Primary Alcohols. Chemistry 2017; 23:11920-11926. [DOI: 10.1002/chem.201702420] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Hajar Golshadi Ghalehshahi
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
- Current address: Department of Chemistry; K. N. Toosi University of Technology, P. O. Box 15875; 4416 Tehran Iran
| | - Robert Madsen
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
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44
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Luo Q, Dai Z, Cong H, Li R, Peng T, Zhang J. Oxidant-free synthesis of benzimidazoles from alcohols and aromatic diamines catalysed by new Ru(ii)-PNS(O) pincer complexes. Dalton Trans 2017; 46:15012-15022. [DOI: 10.1039/c7dt02584j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A greener method for synthesizing 2-substituted benzimidazole through the acceptorless dehydrogenative condensation of alcohols and ortho-arylenediamine is developed.
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Affiliation(s)
- Qi Luo
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Zengjin Dai
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Hengjiang Cong
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Renjie Li
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Tianyou Peng
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Jing Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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45
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Dahl EW, Louis-Goff T, Szymczak NK. Second sphere ligand modifications enable a recyclable catalyst for oxidant-free alcohol oxidation to carboxylates. Chem Commun (Camb) 2017; 53:2287-2289. [DOI: 10.1039/c6cc10206a] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ruthenium–terpyridine complexes appended with secondary amines impart hydride stability and recyclability toward catalytic dehydrogenative alcohol oxidation to carboxylates.
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Affiliation(s)
- Eric W. Dahl
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
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46
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Dai Z, Luo Q, Jiang H, Luo Q, Li H, Zhang J, Peng T. Ni(ii)–N′NN′ pincer complexes catalyzed dehydrogenation of primary alcohols to carboxylic acids and H2accompanied by alcohol etherification. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00432j] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni(L)catalyzed acceptorless dehydrogenation of alcohol/alkoxide to carboxylate with H2liberation.
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Affiliation(s)
- Zengjin Dai
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Qin Luo
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Huan Jiang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Qi Luo
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Hua Li
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Jing Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Tianyou Peng
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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