1
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da Silva MJ, Ribeiro CJA, Rodrigues AA. H4PMo11VO40-Catalyzed β-Citronellal Condensation Reactions. Catal Letters 2023. [DOI: 10.1007/s10562-023-04274-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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2
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Mäki-Arvela P, Simakova I, Vajglová Z, Murzin DY. One-Pot Synthesis of Menthol from Citral and Citronellal Over Heterogeneous Catalysts. CATALYSIS SURVEYS FROM ASIA 2022. [DOI: 10.1007/s10563-022-09376-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AbstractOne-pot synthesis of menthol from citronellal or citral was summarized. Both batch and continuous reactors have been recently applied. This reaction is very complex and a bifunctional catalyst exhibiting especially Lewis acid sites for cyclisation of citronellal to isopulegol are needed, while metal particles are required for its hydrogenation to menthols. Typically, too mild acidity of the catalyst and small particles do not catalyze menthol formation. Furthermore, too high acidity causes catalyst deactivation and dehydration of menthol. Very high menthol yields have been obtained in batch reactor over nobel and transition metal supported bifunctional catalysts. Shape selectivity was demonstrated for Ni-supported on Zr-modified beta zeolite, which gave high diastereoselectivity to the desired L-menthol. Recently one-pot synthesis of menthol in a trickle bed reactor has been investigated. Catalyst suffers only minor deactivation in transformation of citronellal to menthol, while more severe catalyst deactivation occurred in transforming citral to menthols. Noteworthy from the industrial point of view is that the product distribution obtained with the same catalyst under kinetic regime or under diffusional limitations differs from each other. The metal location and synthesis method of extrudates can have a major effect on the catalyst performance. Kinetic modelling of the data obtained from the trickle bed reactor considering the effectiveness factor is discussed.
Graphical Abstract
The results from one-pot synthesis of menthol finding applications in pharmaceuticals and fragrances from citral and its hydrogenated product, citronellal over bifunctional catalysts metal–acid are summarized. The relationship between the catalyst properties and the performance is discussed. In the continuous mode catalyst deactivation becomes apparent and in such mode of operation the product distribution might differ from those obtained in a batch reactor.
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3
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Taghavi S, Mäki-Arvela P, Vajglová Z, Peurla M, Angervo I, Eränen K, Ghedini E, Menegazzo F, Zendehdel M, Signoretto M, Murzin DY. One-Pot Transformation of Citronellal to Menthol Over H-Beta Zeolite Supported Ni Catalyst: Effect of Catalyst Support Acidity and Ni Loading. Catal Letters 2022. [DOI: 10.1007/s10562-022-04178-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AbstractCitronellal was converted to menthol in a one-pot approach using H-Beta zeolite-based Ni catalyst in a batch reactor at 80 °C, under 20 bar of total pressure. The effects of H-Beta acidity (H-Beta-25 with the molar ratio SiO2/Al2O3 = 25 and H-Beta-300 with SiO2/Al2O3 = 300) and Ni loading (5, 10 and 15 wt %) on the catalytic performance were investigated. Ni was impregnated on H-Beta support using the evaporation-impregnation method. The physico-chemical properties of the catalysts were characterized by XRD, SEM, TEM, ICP-OES, N2 physisorption, TPR, and pyridine adsorption–desorption FTIR techniques. Activity and selectivity of catalysts were strongly affected by the Brønsted and Lewis acid sites concentration and strength, Ni loading, its particle size and dispersion. A synergetic effect of appropriate acidity and suitable Ni loading in 15 wt.% Ni/H-Beta-25 catalyst led to the best performance giving 36% yield of menthols and 77% stereoselectivity to ( ±)-menthol isomer at 93% citronellal conversion. Moreover, the catalyst was successfully regenerated and reused giving similar activity, selectivity and stereoselectivity to the desired ( ±)-menthol isomer as the fresh one.
Graphical Abstract
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4
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Design of γ-Alumina-Supported Phosphotungstic Acid-Palladium Bifunctional Catalyst for Catalytic Liquid-Phase Citral Hydrogenation. Catalysts 2022. [DOI: 10.3390/catal12091069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
This study primarily addresses the development of dynamic, selective and economical metal–acid (bifunctional) catalysts for one-pot menthol production by citral hydrogenation. Specifically, various metals such as Pd, Pt, Ni, Cs and Sn were doped over alumina support. Additionally, bifunctional composite catalysts were also prepared with the impregnation of heteropoly acids and Pd precursors over alumina support. Analytical techniques (e.g., BET, PXRD, FT-IR, pyridine adsorption and amine titration methods) were applied for characterization of the most efficient and selective catalysts (e.g., Al2O3 and PTA-Cat-I). Similarly, most of the essential operational variables (e.g., loading rate of metal precursor, type of heteropoly acid, temperature, gas pressure and reaction time) were examined during this study. The experimental data shows that the bifunctional catalyst (PTA-Cat-I) produced 45% menthol at full citral substrate conversion (r = 0.038 mmoles.min−1) in liquid-phase citral hydrogenation (at optimized operating conditions: 70 °C, 0.5 MPa and 8 h). However, the heteropoly acid-supported bifunctional catalysts (e.g., PTA-Cat-I, PMA-Cat-I, SMA-Cat-I and STA-Cat-I) resulted in cracking and the dehydration of isopulegol/menthol by the generation of side products (e.g., 4-isopropyl-1-methyl, cyclohex-1-ane/ene); therefore, menthol yield was extensively diminished. On the other hand, non-acidic catalysts (e.g., Cat-I, Cat-II, Cat-III, Cat-IV and Cat-V) readily promoted hydrogenation reactions. The optimum menthol yield occurred due to the presence of strong Lewis and weak Bronsted acid sites. Mass transfer and reaction rate were substantially diminished due to acidity strength, heteropoly acid type and blockage of pores by the applied bifunctional catalysts.
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5
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Simakova IL, Mäki-Arvela P, Martínez-Klimov M, Muller J, Vajglová Z, Peurla M, Eränen K, Murzin DY. One-Pot Synthesis of Menthol Starting from Citral over Ni Supported on Attapulgite-H-Beta-38 Extrudates in a Continuous Flow: Effect of Metal Location. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Irina L. Simakova
- Boreskov Institute of Catalysis, pr. Ak. Lavrentieva 5, Novosibirsk, Russia 630090
| | - Päivi Mäki-Arvela
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Henriksgatan 2, 20500 Turku/Åbo, Finland
| | - Mark Martínez-Klimov
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Henriksgatan 2, 20500 Turku/Åbo, Finland
| | - Joseph Muller
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Henriksgatan 2, 20500 Turku/Åbo, Finland
| | - Zuzana Vajglová
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Henriksgatan 2, 20500 Turku/Åbo, Finland
| | - Markus Peurla
- Institute of Biomedicine, University of Turku, Kiinamyllynkatu 10, FI-20520 Turku, Finland
| | - Kari Eränen
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Henriksgatan 2, 20500 Turku/Åbo, Finland
| | - Dmitry Yu. Murzin
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Henriksgatan 2, 20500 Turku/Åbo, Finland
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6
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Dylong D, Hausoul PJC, Palkovits R, Eisenacher M. Synthesis of (−)‐menthol: Industrial synthesis routes and recent development. FLAVOUR FRAG J 2022. [DOI: 10.1002/ffj.3699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dominik Dylong
- Circular Transformation Lab Cologne TH Köln – University of Applied Sciences Leverkusen Germany
| | - Peter J. C. Hausoul
- Institute of Technical and Macromolecular Chemistry RWTH Aachen University Aachen Germany
| | - Regina Palkovits
- Institute of Technical and Macromolecular Chemistry RWTH Aachen University Aachen Germany
| | - Matthias Eisenacher
- Circular Transformation Lab Cologne TH Köln – University of Applied Sciences Leverkusen Germany
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7
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Simakova IL, Vajglová Z, Mäki-Arvela P, Eränen K, Hupa L, Peurla M, Mäkilä EM, Wärnå J, Murzin DY. Citral-to-Menthol Transformations in a Continuous Reactor over Ni/Mesoporous Aluminosilicate Extrudates Containing a Sepiolite Clay Binder. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.1c00435] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Irina L. Simakova
- Boreskov Institute of Catalysis, pr. Ak. Lavre ntiev a 5, 630090 Novosibirsk, Russia
| | - Zuzana Vajglová
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Henrikinkatu 2, Turku/Åbo 20500, Finland
| | - Päivi Mäki-Arvela
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Henrikinkatu 2, Turku/Åbo 20500, Finland
| | - Kari Eränen
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Henrikinkatu 2, Turku/Åbo 20500, Finland
| | - Leena Hupa
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Henrikinkatu 2, Turku/Åbo 20500, Finland
| | | | | | - Johan Wärnå
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Henrikinkatu 2, Turku/Åbo 20500, Finland
| | - Dmitry Yu. Murzin
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Henrikinkatu 2, Turku/Åbo 20500, Finland
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8
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Minh Le T, Szakonyi Z. Enantiomeric Isopulegol as the Chiral Pool in the Total Synthesis of Bioactive Agents. CHEM REC 2021; 22:e202100194. [PMID: 34553822 DOI: 10.1002/tcr.202100194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/05/2021] [Indexed: 11/12/2022]
Abstract
Isopulegol, a pool of abundant chiral terpene, has long served as the starting material for the total synthesis of isopulegol-based drugs. As an inexpensive and versatile starting material, this compound continues to serve modern synthetic chemistry. This review highlights the total syntheses of terpenoids in the period from 1980 to 2020 in which with isopulegol applied as a building block.
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Affiliation(s)
- Tam Minh Le
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720, Szeged, Hungary.,Stereochemistry Research Group of the Hungarian Academy Science, Eötvös utca 6, H-6720, Szeged, Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720, Szeged, Hungary.,Interdisciplinary Centre of Natural Products, University of Szeged, Eötvös utca 6, H-6720, Szeged, Hungary
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9
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New thermal releaser of menthol: Cellulose acetate film covered amorphous silica. FLAVOUR FRAG J 2021. [DOI: 10.1002/ffj.3656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Vajglová Z, Mäki-Arvela P, Eränen K, Kumar N, Peurla M, Murzin DY. Catalytic transformations of citral in a continuous flow over bifunctional Ru-MCM-41 extrudates. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00066g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The three-step reaction of citral to menthol was investigated in an autoclave and a trickle-bed reactor over Ru-MCM-41 catalysts in powder and shaped forms, respectively, with the same composition and controlled metal location.
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Affiliation(s)
- Zuzana Vajglová
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Päivi Mäki-Arvela
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Kari Eränen
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Narendra Kumar
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | | | - Dmitry Yu. Murzin
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
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11
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Goodine T, Oelgemöller M. Corymbia citriodora
: A Valuable Resource from Australian Flora for the Production of Fragrances, Repellents, and Bioactive Compounds. CHEMBIOENG REVIEWS 2020. [DOI: 10.1002/cben.202000013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Tyler Goodine
- James Cook University College of Science and Engineering 1 James Cook Drive 4811 Townsville Queensland Australia
| | - Michael Oelgemöller
- James Cook University College of Science and Engineering 1 James Cook Drive 4811 Townsville Queensland Australia
- Ghent University Department of Organic and Macromolecular Chemistry Krijgslaan 281 S4 9000 Gent Belgium
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12
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Fe-Modified Zeolite BETA as an Active Catalyst for Intramolecular Prins Cyclization of Citronellal. Catal Letters 2020. [DOI: 10.1007/s10562-020-03456-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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14
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Mousavi S, Nazari B, Keshavarz MH, Bordbar AK. A Simple Method for Safe Determination of the Activity of Palladium on Activated Carbon Catalysts in the Hydrogenation of Cinnamic Acid to Hydrocinnamic Acid. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06087] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Sajjad Mousavi
- Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr 83145/115, Iran
| | - Behzad Nazari
- Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr 83145/115, Iran
| | - Mohammad H. Keshavarz
- Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr 83145/115, Iran
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15
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Vajglová Z, Kumar N, Peurla M, Eränen K, Mäki-Arvela P, Murzin DY. Cascade transformations of (±)-citronellal to menthol over extruded Ru-MCM-41 catalysts in a continuous reactor. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01251c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Catalytic cascade transformations of (±)-citronellal in a continuous mode over bifunctional ruthenium/MCM-41/binder extrudates with different metal location.
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Affiliation(s)
- Zuzana Vajglová
- Åbo Akademi University
- Johan Gadolin Process Chemistry Centre
- Turku/Åbo
- Finland 20500
| | - Narendra Kumar
- Åbo Akademi University
- Johan Gadolin Process Chemistry Centre
- Turku/Åbo
- Finland 20500
| | | | - Kari Eränen
- Åbo Akademi University
- Johan Gadolin Process Chemistry Centre
- Turku/Åbo
- Finland 20500
| | - Päivi Mäki-Arvela
- Åbo Akademi University
- Johan Gadolin Process Chemistry Centre
- Turku/Åbo
- Finland 20500
| | - Dmitry Yu Murzin
- Åbo Akademi University
- Johan Gadolin Process Chemistry Centre
- Turku/Åbo
- Finland 20500
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16
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Shah AK, Maitlo G, Shah AA, Channa IA, Kandhro GA, Maitlo HA, Bhatti UH, Shah A, Memon AQ, Jatoi AS, Park YH. One pot menthol synthesis via hydrogenations of citral and citronellal over montmorillonite-supported Pd/Ni-heteropoly acid bifunctional catalysts. REACTION KINETICS MECHANISMS AND CATALYSIS 2019. [DOI: 10.1007/s11144-019-01679-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Azkaar M, Mäki-Arvela P, Vajglová Z, Fedorov V, Kumar N, Hupa L, Hemming J, Peurla M, Aho A, Murzin DY. Synthesis of menthol from citronellal over supported Ru- and Pt-catalysts in continuous flow. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00346k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-pot menthol synthesis in a trickle bed reactor was investigated using Ru/H-beta-300 extrudates without any binder and Pt- and Ru/H-beta-25 extrudates containing 30 wt% bentonite binder using different methods of metal loading on the extrudates.
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Affiliation(s)
- Muhammad Azkaar
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Päivi Mäki-Arvela
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Zuzana Vajglová
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Vyacheslav Fedorov
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
- Saint-Petersburg State Institute of Technology (Technical University)
| | - Narendra Kumar
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Leena Hupa
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Jarl Hemming
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Markus Peurla
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Atte Aho
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
| | - Dmitry Yu Murzin
- Johan Gadolin Process Chemistry Centre
- Åbo Akademi University
- Turku/Åbo
- Finland
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18
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Moreno-Marrodan C, Liguori F, Barbaro P, Caporali S, Merlo L, Oldani C. Metal Nanoparticles Supported on Perfluorinated Superacid Polymers: A Family of Bifunctional Catalysts for the Selective, One-Pot Conversion of Vegetable Substrates in Water. ChemCatChem 2017. [DOI: 10.1002/cctc.201700945] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Carmen Moreno-Marrodan
- Consiglio Nazionale delle Ricerche; Istituto di Chimica dei Composti Organo Metallici; Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Francesca Liguori
- Consiglio Nazionale delle Ricerche; Istituto di Chimica dei Composti Organo Metallici; Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Pierluigi Barbaro
- Consiglio Nazionale delle Ricerche; Istituto di Chimica dei Composti Organo Metallici; Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Stefano Caporali
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali; Via Giusti 9 50121 Firenze Italy
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi; Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Luca Merlo
- Solvay Specialty Polymers (Italy) S.p.A.; Viale Lombardia 20 20021 Bollate Milano Italy
| | - Claudio Oldani
- Solvay Specialty Polymers (Italy) S.p.A.; Viale Lombardia 20 20021 Bollate Milano Italy
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19
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Kalyon N, Hofmann K, Malter J, Lucas M, Claus P, Albert B. Catalytic activity of nanoscale borides: Co2B and Ni7B3 in the liquid-phase hydrogenation of citral. J Catal 2017. [DOI: 10.1016/j.jcat.2017.06.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Chen H, Zou H, Hao Y, Yang H. Flow Pickering Emulsion Interfaces Enhance Catalysis Efficiency and Selectivity for Cyclization of Citronellal. CHEMSUSCHEM 2017; 10:1989-1995. [PMID: 28334512 DOI: 10.1002/cssc.201700318] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/18/2017] [Indexed: 06/06/2023]
Abstract
Cyclization of citronellal is a necessary intermediate step to produce the important flavor chemical (-)-menthol. Here, a continuous-flow Pickering emulsion (FPE) strategy for selective cyclization of citronellal to (-)-isopulegol by using water droplets hosting a heteropolyacid (HPA) catalyst to fill a column reactor is demonstrated. Owing to the large liquid-liquid interface and the excellent confinement ability of droplets toward HPA, the FPE system exhibited a much higher catalysis efficiency than its batch counterpart (2-5-fold) and an excellent durability (two months). Moreover, a remarkably enhanced selectivity was observed from 34.8 % for batch reactions to 64 % for the FPE reactions. It was found that the water droplet size and the flow rate significantly impact the catalysis selectivity and efficiency. This study not only represents an unprecedented and sustainable process for the selective cyclization of citronellal but also demonstrates a new flow-interface catalysis effect that can be useful for designing innovative catalysis systems in the future.
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Affiliation(s)
- Huan Chen
- School of Chemistry and Chemical Engineering, Shanxi University, 92 Wucheng Road, Taiyuan, 030006, P.R. China
| | - Houbing Zou
- School of Chemistry and Chemical Engineering, Shanxi University, 92 Wucheng Road, Taiyuan, 030006, P.R. China
| | - Yajuan Hao
- School of Chemistry and Chemical Engineering, Shanxi University, 92 Wucheng Road, Taiyuan, 030006, P.R. China
| | - Hengquan Yang
- School of Chemistry and Chemical Engineering, Shanxi University, 92 Wucheng Road, Taiyuan, 030006, P.R. China
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21
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Dam JT, Ramanathan A, Djanashvili K, Kapteijn F, Hanefeld U. Synthesis, characterization and performance of bifunctional catalysts for the synthesis of menthol from citronellal. RSC Adv 2017. [DOI: 10.1039/c6ra25931f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
TUD-1 based catalysts containing WO3 and Pt were synthesized and assessed in the conversion of citronellal to menthol. The hydrogenation on Pt is highest for small WO3 particles, while their agglomeration leads to a decreased interaction and catalytic performance.
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Affiliation(s)
- J. ten Dam
- Biocatalysis and Organic Chemistry
- Department of Biotechnology
- Delft University of Technology
- 2629 HZ Delft
- The Netherlands
| | - A. Ramanathan
- Center for Environmentally Beneficial Catalysis (CEBC)
- The University of Kansas
- Lawrence
- USA
| | - K. Djanashvili
- Biocatalysis and Organic Chemistry
- Department of Biotechnology
- Delft University of Technology
- 2629 HZ Delft
- The Netherlands
| | - F. Kapteijn
- Catalysis Engineering
- Department of Chemical Engineering
- Delft University of Technology
- 2629 HZ Delft
- The Netherlands
| | - U. Hanefeld
- Biocatalysis and Organic Chemistry
- Department of Biotechnology
- Delft University of Technology
- 2629 HZ Delft
- The Netherlands
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22
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Abstract
Comparative review of the catalytic performance of isolated tetravalent metals as Lewis acid sites in zeolite and MOF materials.
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23
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Zhu G, Xiao Z, Zhu G, Rujunzhou, Niu Y. Encapsulation of l-menthol in hydroxypropyl-β-cyclodextrin and release characteristics of the inclusion complex. POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2016. [DOI: 10.1515/pjct-2016-0056] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Abstract
l-menthol has been widely used in flavour, food and pharmaceuticals. Because of its high volatility and whisker growth, l-menthol-hydroxypropyl-β-cyclodextrin inclusion complex was produced to improve shelf-life, provide protection, and enhance the stability of l-menthol. The inclusion complex was characterized by Fourier transform infrared spectroscopy, X-ray diffraction. The results show that l-menthol was successfully encapsulated in hydroxypropyl-β-cyclodextrin. l-menthol loading capacity is about 8.44%. Geometries and binding energies of l-menthol-hydroxypropyl-β-cyclodextrin inclusion complexes were investigated using molecular mechanics calculations. The shape and orientation of the most stable complex, and the minimum binding energy were determined. L-menthol release from complex was determined by thermogravimetric analysis. Two l-menthol release rate peaks were observed at 69.3 and 279.1°C. The l-menthol release reaction order, release activation energy and the preexponential factor were obtained.
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Affiliation(s)
- Guangyong Zhu
- Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai, 201418, China
| | - Zuobing Xiao
- Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai, 201418, China
| | - Guangxu Zhu
- 14846, 43 Ave. Edmonton, Alberta, T6H 5S1, Canada
| | - Rujunzhou
- Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai, 201418, China
| | - Yunwei Niu
- Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai, 201418, China
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24
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Abstract
Terpenoids are a very prominent class of natural compounds produced in diverse genera of plants, fungi, algae and sponges. They gained significant pharmaceutical value since prehistoric times, due to their broad spectrum of medical applications. The fragrant leaves of Eucalyptus trees are a rich source of terpenoids. Therefore this review starts by summarizing the main terpenoid compounds present in Eucalyptus globulus, E. citriodora, E. radiata and E. resinifera and describing their biosynthetic pathways. Of the enormous number of pharmaceutically important terpenoids, this paper also reviews some well established and recently discovered examples and discusses their medical applications. In this context, the synthetic processes for (–)-menthol, (–)- cis-carveol, (+)-artemisinine, (+)-merrilactone A and (–)-sclareol are presented. The tricyclic sesquiterpene (–)-englerin A isolated from the stem bark of the Phyllanthus engleri plant ( Euphorbiaceae) is highly active against certain renal cancer cell lines. In addition, recent studies showed that englerin A is also a potent and selective activator of TRPC4 and TRPC5 calcium channels. These important findings were the motivation for several renowned research labs to achieve a total synthesis of (–)-englerin A. Two prominent examples – Christmann and Metz – are compared and discussed in detail.
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Affiliation(s)
- Rolf Jaeger
- Formerly Institute of Organic Chemistry, Kiel University, Otto-Hahn-Platz, 24098 Kiel, Germany
| | - Eckehard Cuny
- Clemens-Schöpf-Institute of Organic Chemistry and Biochemistry, Darmstadt Technical University, Alarich-Weiss-Straße 4, 64287 Darmstadt, Germany
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25
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Plößer J, Lucas M, Wärnå J, Salmi T, Murzin DY, Claus P. Kinetics of the One-Pot Transformation of Citronellal to Menthols on Ru/H-BEA Catalysts. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00214] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jutta Plößer
- Dept.
Chemistry, Chemical Technology II, Technical University Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Martin Lucas
- Dept.
Chemistry, Chemical Technology II, Technical University Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Johan Wärnå
- Laboratory
of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku, Finland
| | - Tapio Salmi
- Laboratory
of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku, Finland
| | - Dmitry Yu. Murzin
- Laboratory
of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku, Finland
| | - Peter Claus
- Dept.
Chemistry, Chemical Technology II, Technical University Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
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