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Messori A, Martelli G, Piazzi A, Basile F, De Maron J, Fasolini A, Mazzoni R. Molecular Ruthenium Cyclopentadienone Bifunctional Catalysts for the Conversion of Sugar Platforms to Hydrogen. Chempluschem 2023; 88:e202300357. [PMID: 37572103 DOI: 10.1002/cplu.202300357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/02/2023] [Accepted: 08/07/2023] [Indexed: 08/14/2023]
Abstract
Molecular ruthenium cyclopentadienone complexes were employed for the first time as pre-catalysts in the homogeneously catalysed Aqueous Phase Reforming (APR) of glucose. Shvo's complex resulted the best pre-catalyst (loading 2 mol %) with H2 yields up to 28.9 % at 150 °C. Studies of the final mixture allowed to identify the catalyst's resting state as a mononuclear dicarbonyl complex in the extracted organic fraction. In situ NMR experiments and HPLC analyses on the aqueous fraction gave awareness of the presence of sorbitol, fructose, 5-hydroxymethylfurfural and furfural as final fate or intermediates in the transformations under APR conditions. These results were summarized in a proposed mechanism, with particular emphasis on the steps where hydrogen was obtained as the product. Benzoquinone positively affected the catalyst activation when employed as an equimolar additive.
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Affiliation(s)
- Alessandro Messori
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
| | - Giulia Martelli
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
| | - Andrea Piazzi
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
| | - Francesco Basile
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
| | - Jacopo De Maron
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
| | - Andrea Fasolini
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
| | - Rita Mazzoni
- Department of Industrial Chemistry "Toso Montanari" viale, Risorgimento 4, 40136, Bologna, Italy
- Center for Chemical Catalysis - C3, University of Bologna viale, Risorgimento 4, 40136, Bologna, Italy
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2
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Lam PM, John A. Molybdenum Catalyzed Deoxydehydration of Aliphatic Glycols Under Microwave Irradiation. J Organomet Chem 2023. [DOI: 10.1016/j.jorganchem.2023.122705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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3
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Mascitti A, Scioli G, Tonucci L, Canale V, Germani R, Di Profio P, d’Alessandro N. First Evidence of the Double-Bond Formation by Deoxydehydration of Glycerol and 1,2-Propanediol in Ionic Liquids. ACS OMEGA 2022; 7:27980-27990. [PMID: 35990467 PMCID: PMC9386840 DOI: 10.1021/acsomega.2c01803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Deoxydehydration (DODH) reaction of glycerol (GL) and 1,2-propanediol (1,2-PD), in ionic liquids (ILs), catalyzed by methyltrioxorhenium (MTO) and Re2O7, was studied in detail. To better understand the ability of ILs to improve the catalytic performance of the rhenium catalyst, several experiments, employing eight different cations and two different anions, were carried out. Among the anions, bis(trifluoromethylsulfonyl)imide (TFSI) appears to be more appropriate than PF6 -, for its relatively lower volatility of the resulting IL. Regarding the choice of the most appropriate cation, the presence of a single aromatic ring seems to be a necessary requirement for a satisfying and convenient reactivity. With the aim to extend the recyclability of the catalyst, experiments involving the readdition of polyol to the terminal reaction mixture were carried out. Worthy of interest is the fact that the presence of the IL prevents the inertization process of the catalyst, allowing us to obtain the alkene also after a readdition of fresh polyol.
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Affiliation(s)
- Andrea Mascitti
- Department
of Engineering and Geology, “G. d’Annunzio”
University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy
| | - Giuseppe Scioli
- Department
of Engineering and Geology, “G. d’Annunzio”
University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy
| | - Lucia Tonucci
- Department
of Philosophical, Educational and Economic Sciences, “G. d’Annunzio” University of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Valentino Canale
- Department
of Pharmacy, “G. d’Annunzio”
University of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Raimondo Germani
- Department
of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di sotto, 06123 Perugia, Italy
| | - Pietro Di Profio
- Department
of Pharmacy, “G. d’Annunzio”
University of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Nicola d’Alessandro
- Department
of Engineering and Geology, “G. d’Annunzio”
University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy
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4
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Hacatrjan S, Liu L, Gan J, Nakagawa Y, Cao J, Yabushita M, Tamura M, Tomishige K. Titania-supported molybdenum oxide combined with Au nanoparticles as hydrogen-driven deoxydehydration catalyst of diol compounds. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02144c] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heterogenous catalyst for deoxydehydration (DODH) reaction was developed using less expensive Mo than Re as the active center. Combination of Mo with anatase-rich TiO2 and Au as the support...
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5
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Jentoft FC. Transition metal-catalyzed deoxydehydration: missing pieces of the puzzle. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02083h] [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
Deoxydehydration (DODH) is a transformation that converts a vicinal diol into an olefin with the help of a sacrificial reductant.
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Affiliation(s)
- Friederike C. Jentoft
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA 01003-9303, USA
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6
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Aksanoglu E, Lim YH, Bryce RA. Direct Deoxydehydration of Cyclic trans-Diol Substrates: An Experimental and Computational Study of the Reaction Mechanism of Vanadium(V)-based Catalysis*. CHEMSUSCHEM 2021; 14:1545-1553. [PMID: 33465299 PMCID: PMC8048994 DOI: 10.1002/cssc.202002594] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/11/2021] [Indexed: 06/12/2023]
Abstract
The deoxydehydration of carbohydrates represents a key target to leverage renewable biomass resources chemically. Using a vanadium(V)-based catalyst, it was possible to directly deoxydehydrate cyclic trans-diol substrates. Accompanying mechanistic characterisation of this process by density functional calculations pointed to an energetically tractable route for deoxydehydration of cyclic trans-diol substrates involving stepwise cleavage of the diol C-O bonds via the triplet state; experimentally, this was supported by light dependence of the reaction. Calculations also indicated that cyclic cis-diols and a linear diol substrate could additionally proceed by a concerted singlet DODH mechanism. This work potentially opens a new and cost-effective way to efficiently convert carbohydrates of trans-diol stereochemistry into alkenes.
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Affiliation(s)
- Ebru Aksanoglu
- Division of Pharmacy and Optometry, School of Health SciencesManchester Academic Health Sciences CentreUniversity of ManchesterOxford RoadManchesterM13 9PLUK
- Functional Molecules & PolymersInstitute of Chemical and Engineering Sciences8 Biomedical Grove, #07-01/02Singapore138665Singapore
| | - Yee Hwee Lim
- Functional Molecules & PolymersInstitute of Chemical and Engineering Sciences8 Biomedical Grove, #07-01/02Singapore138665Singapore
| | - Richard A. Bryce
- Division of Pharmacy and Optometry, School of Health SciencesManchester Academic Health Sciences CentreUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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7
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Donnelly LJ, Parsons S, Morrison CA, Thomas SP, Love JB. Synthesis and structures of anionic rhenium polyhydride complexes of boron-hydride ligands and their application in catalysis. Chem Sci 2020; 11:9994-9999. [PMID: 34094263 PMCID: PMC8162066 DOI: 10.1039/d0sc03458d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The rhenium complex, [K(DME)(18-c-6)][ReH4(Bpin)(η2-HBpin)(κ2-H2Bpin)] 1, comprising hydride and boron ligands only, has been synthesized by exhaustive deoxygenation of the commercially available perrhenate anion (ReO4 -) with pinacol borane (HBpin). The structure of 1 was analysed by X-ray crystallography, NMR spectroscopy, and DFT calculations. While no hydrides were located in the X-ray crystal structure, it revealed a trigonal arrangement of pinacol boron ligands. Variable-temperature NMR spectroscopy supported the presence of seven hydride ligands but further insight was hindered by the fluxionality of both hydride and boron ligands at low temperature. Further evaluation of the structure by Ab Initio Random Structure Searching (AIRSS) identified the presence of hydride, boryl, σ-borane, and dihydroborate ligands. This complex, either isolated or prepared in situ, is a catalyst for the 1,4-hydroboration of N-heteroaromatic substrates under simple operating procedures. It also acts as a reagent for the stoichiometric C-H borylation of toluene, displaying high meta regioselectivity in the borylated products. Reaction of 1 with 9-BBN resulted in HBpin substitution to form the new anionic tetra(dihydroborate) complex [K(DME)(18-c-6)][Re(κ2-H-9-BBN)4] 4 for which the hydride positions were clearly identified by X-ray crystallography. The method used to generate these isolable yet reactive boron-hydride complexes is direct and straightforward and has potential utility for the exploitation of other metal oxo compounds in operationally simple catalytic reactions.
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Affiliation(s)
- Liam J Donnelly
- EaStCHEM School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, The King's Buildings Edinburgh EH9 3FJ UK
| | - Simon Parsons
- EaStCHEM School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, The King's Buildings Edinburgh EH9 3FJ UK
| | - Carole A Morrison
- EaStCHEM School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, The King's Buildings Edinburgh EH9 3FJ UK
| | - Stephen P Thomas
- EaStCHEM School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, The King's Buildings Edinburgh EH9 3FJ UK
| | - Jason B Love
- EaStCHEM School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, The King's Buildings Edinburgh EH9 3FJ UK
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8
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N-Donor Ligand Supported “ReO2+”: A Pre-Catalyst for the Deoxydehydration of Diols and Polyols. Catalysts 2020. [DOI: 10.3390/catal10070754] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A selected number of tetradentate N2Py2 ligand-supported ReO2+ complexes and a monodentate pyridine-supported ReO2+ complex have been investigated as catalysts for the deoxydehydration (DODH) of diols and polyols. In situ 1H NMR experiments showed that these N-donor ligand-supported ReO2+ complexes are only the pre-catalyst of the DODH reaction. Treatment of (N2Py2) ReO2+ with an excess amount of water generates an active species for DODH catalysis; use of the Re-product of this reaction shows a much shorter induction period compared to the pristine complex. No ligand is coordinated to the “water-treated” complex indicating that the real catalyst is formed after ligand dissociation. IR analysis suggested this catalyst to be a rhenium-oxide/hydroxide oligomer. The monodentate pyridine ligand is much easier to dissociate from the metal center than a tetradentate N2Py2 ligand, which makes the Py4ReO2+-initiated DODH reaction more efficient. For the Py4ReO2+-initiated DODH of diols and biomass-based polyols, both PPh3 and 3-pentanol could be used as a reductant. Excellent olefin yields are achieved.
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9
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Siu TC, Silva I, Lunn MJ, John A. Influence of the pendant arm in deoxydehydration catalyzed by dioxomolybdenum complexes supported by amine bisphenolate ligands. NEW J CHEM 2020. [DOI: 10.1039/d0nj02151b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molybdenum complexes devoid of a strongly coordinating pendant arm result in enhanced catalytic activity.
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Affiliation(s)
- Timothy C. Siu
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
| | - Israel Silva
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
| | - Maiko J. Lunn
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
| | - Alex John
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
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10
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DeNike KA, Kilyanek SM. Deoxydehydration of vicinal diols by homogeneous catalysts: a mechanistic overview. ROYAL SOCIETY OPEN SCIENCE 2019; 6:191165. [PMID: 31827851 PMCID: PMC6894556 DOI: 10.1098/rsos.191165] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
Deoxydehydration (DODH) is an important reaction for the upconversion of biomass-derived polyols to commodity chemicals such as alkenes and dienes. DODH can be performed by a variety of early metal-oxo catalysts incorporating Re, Mo and V. The varying reduction methods used in the DODH catalytic cycle impact the product distribution, reaction mechanism and the overall yield of the reaction. This review surveys the reduction methods commonly used in homogeneous DODH catalyst systems and their impacts on yield and reaction conditions.
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Affiliation(s)
| | - Stefan M. Kilyanek
- Department of Chemistry and Biochemistry, University of Arkansas, 1 University of Arkansas, Fayetteville, AR 727001, USA
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11
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Donnelly LJ, Thomas SP, Love JB. Recent Advances in the Deoxydehydration of Vicinal Diols and Polyols. Chem Asian J 2019; 14:3782-3790. [PMID: 31573149 DOI: 10.1002/asia.201901274] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Indexed: 01/03/2023]
Abstract
Deoxydehydration (DODH) is one of the most promising tools to reduce the oxygen content of biomass (sugars and polyols) and provide analogues of platform chemicals that are derived from fossil resources. This reaction converts a vicinal diol into an alkene and is typically catalyzed by high-oxidation-state metal-oxo compounds in the presence of a stoichiometric reductant, with examples of both homogeneous and heterogeneous systems. This minireview will highlight the developments in this field over the past 5 years and focus on efforts to solve the problems that currently prevent DODH being performed on a commercial scale, including the nature of the reductant, substrate scope and selectivity, and catalyst recovery and expense.
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Affiliation(s)
- Liam J Donnelly
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Stephen P Thomas
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Jason B Love
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
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12
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Shakeri J, Hadadzadeh H, Farrokhpour H, Weil M. A comparative study of the counterion effect on the perrhenate-catalyzed deoxydehydration reaction. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.04.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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13
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Leszczyńska-Sejda K, Benke G, Malarz J, Ciszewski M, Kopyto D, Piątek J, Drzazga M, Kowalik P, Zemlak K, Kula B. Rhenium(VII) Compounds as Inorganic Precursors for the Synthesis of Organic Reaction Catalysts. Molecules 2019; 24:molecules24081451. [PMID: 31013720 PMCID: PMC6514865 DOI: 10.3390/molecules24081451] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/09/2019] [Accepted: 04/11/2019] [Indexed: 11/16/2022] Open
Abstract
Rhenium is an element that exhibits a broad range of oxidation states. Synthesis paths of selected rhenium compounds in its seventh oxidation state, which are common precursors for organic reaction catalysts, were presented in this paper. Production technologies for copper perrhenate, aluminum perrhenate as well as the ammonia complex of cobalt perrhenate, are thoroughly described. An ion exchange method, based on Al or Cu metal ion sorption and subsequent elution by aqueous perrhenic acid solutions, was used to obtain perrhenates. The produced solutions were neutralized to afford the targeted aluminum perrhenate and copper perrhenate products in high purity. The developed technologies allow one to manage the wastes from the production of these perrhenates as most streams were recycled. Hexaamminecobalt(III) perrhenate was produced by a newly developed method enabling us to produce a high purity compound in a reaction of spent hexaamminecobalt(III) chloride solution with a perrhenic acid. All prepared compounds are the basis for precursor preparation in organic catalysis.
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Affiliation(s)
| | - Grzegorz Benke
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Joanna Malarz
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Mateusz Ciszewski
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Dorota Kopyto
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Jędrzej Piątek
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Michał Drzazga
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Patrycja Kowalik
- Hydrometallurgy Department, Instytut Metali Nieżelaznych (IMN), ul. Sowińskiego 5, 44-100 Gliwice, Poland.
| | - Krzysztof Zemlak
- Syntal Chemicals Sp. z o.o., ul Łabędzka 59. 44-121 Gliwice, Poland.
| | - Bartłomiej Kula
- Syntal Chemicals Sp. z o.o., ul Łabędzka 59. 44-121 Gliwice, Poland.
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14
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Lupacchini M, Mascitti A, Canale V, Tonucci L, Colacino E, Passacantando M, Marrone A, d'Alessandro N. Deoxydehydration of glycerol in presence of rhenium compounds: reactivity and mechanistic aspects. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02478b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Re compounds in different oxidation states are activated during a delay time into an active Re alkoxide precipitate catalysing the DODH of glycerol.
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Affiliation(s)
- Massimiliano Lupacchini
- Department of Engineering and Geology
- University "G. d'Annunzio" of Chieti-Pescara
- Chieti Scalo
- Italy
| | - Andrea Mascitti
- Department of Engineering and Geology
- University "G. d'Annunzio" of Chieti-Pescara
- Chieti Scalo
- Italy
| | - Valentino Canale
- Department of Pharmacy
- University "G. d'Annunzio" of Chieti-Pescara
- Chieti Scalo
- Italy
| | - Lucia Tonucci
- Department of Philosophical
- Educational and Economic Sciences
- University "G. d'Annunzio" of Chieti-Pescara
- Chieti Scalo
- Italy
| | - Evelina Colacino
- Institut Charles Gerhardt de Montpellier (ICGM)
- Montpellier Cedex 05
- France
| | | | - Alessandro Marrone
- Department of Pharmacy
- University "G. d'Annunzio" of Chieti-Pescara
- Chieti Scalo
- Italy
| | - Nicola d'Alessandro
- Department of Engineering and Geology
- University "G. d'Annunzio" of Chieti-Pescara
- Chieti Scalo
- Italy
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15
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Li J, Lutz M, Otte M, Klein Gebbink RJM. A Cp tt-Based Trioxo-Rhenium Catalyst for the Deoxydehydration of Diols and Polyols. ChemCatChem 2018; 10:4755-4760. [PMID: 31007775 PMCID: PMC6472585 DOI: 10.1002/cctc.201801151] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/13/2022]
Abstract
Trioxo-rhenium complexes are well known catalysts for the deoxydehydration (DODH) of vicinal diols (glycols). In this work, we report on the DODH of diols and biomass-derived polyols using CpttReO3 as a new catalyst (Cptt=1,3-di-tert-butylcyclopentadienyl). The DODH reaction was optimized using 2 mol % of CpttReO3 and 3-octanol as both reductant and solvent. The CpttReO3 catalyst exhibits an excellent activity for biomass-derived polyols. Specifically, glycerol is almost quantitatively converted to allyl alcohol and mucic acid gives 75 % of muconates at 91 % conversion. In addition, the loading of CpttReO3 can be reduced to 0.1 mol % to achieve a turn-over number as high as 900 per Re when using glycerol as substrate. Examination of DODH reaction profiles by NMR spectroscopy indicates that catalysis is related to Cp-ligand release, which raises questions on the nature of the actual catalyst.
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Affiliation(s)
- Jing Li
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 99Utrecht3584CGThe Netherlands
| | - Martin Lutz
- Crystal and Structural Chemistry Bijvoet Center for Biomolecular Research Faculty of ScienceUtrecht UniversityPadualaan 8Utrecht3584 CHThe Netherlands
| | - Matthias Otte
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 99Utrecht3584CGThe Netherlands
- current address: Institut für Anorganische ChemieUniversity of GöttingenTammannstraße 4Göttingen37077Germany
| | - Robertus J. M. Klein Gebbink
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 99Utrecht3584CGThe Netherlands
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