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Mukhtar Gunam Resul MF, Rehman A, Saleem F, Usman M, López Fernández AM, Eze VC, Harvey AP. Recent advances in catalytic and non-catalytic epoxidation of terpenes: a pathway to bio-based polymers from waste biomass. RSC Adv 2023; 13:32940-32971. [PMID: 38025849 PMCID: PMC10630890 DOI: 10.1039/d3ra04870e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 11/01/2023] [Indexed: 12/01/2023] Open
Abstract
Epoxides derived from waste biomass are a promising avenue for the production of bio-based polymers, including polyamides, polyesters, polyurethanes, and polycarbonates. This review article explores recent efforts to develop both catalytic and non-catalytic processes for the epoxidation of terpene, employing a variety of oxidizing agents and techniques for process intensification. Experimental investigations into the epoxidation of limonene have shown that these methods can be extended to other terpenes. To optimize the epoxidation of bio-based terpene, there is a need to develop continuous processes that address limitations in mass and heat transfer. This review discusses flow chemistry and innovative reactor designs as part of a multi-scale approach aimed at industrial transformation. These methods facilitate continuous processing, improve mixing, and either eliminate or reduce the need for solvents by enhancing heat transfer capabilities. Overall, the objective of this review is to contribute to the development of commercially viable processes for producing bio-based epoxides from waste biomass.
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Affiliation(s)
- Mohamad Faiz Mukhtar Gunam Resul
- School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
| | - Abdul Rehman
- School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
- Department of Chemical and Polymer Engineering, University of Engineering and Technology Lahore Faisalabad Campus Pakistan
| | - Faisal Saleem
- School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
- Department of Chemical and Polymer Engineering, University of Engineering and Technology Lahore Faisalabad Campus Pakistan
| | - Muhammd Usman
- Department of Chemical and Polymer Engineering, University of Engineering and Technology Lahore Faisalabad Campus Pakistan
| | | | - Valentine C Eze
- School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
| | - Adam P Harvey
- School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
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2
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Murayama S, Li Z, Liang H, Liu Y, Naka H, Maruoka K. Impact of Catalyst Deuteration on the Reactivity of Chiral Phase-Transfer Organocatalysts. Chemistry 2023; 29:e202301866. [PMID: 37332072 DOI: 10.1002/chem.202301866] [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: 06/12/2023] [Revised: 06/16/2023] [Accepted: 06/16/2023] [Indexed: 06/20/2023]
Abstract
Site-specifically deuterated organocatalysts were prepared and found to show improved reactivity over the non-deuterated analogs. Two privileged C2 -symmetric chiral binaphthyl-modified tetraalkylammonium salts were selected for this study. The stability of these phase-transfer catalysts was generally improved by site-specific deuteration, though the degree of improvement was structure dependent. In particular, a large secondary kinetic isotope effect was observed for the tetradeuterated phase-transfer catalyst. The performance of these deuterated catalysts in the asymmetric catalytic alkylation of amino acid derivatives was better than that of non-deuterated analogs at low catalyst loadings. The results suggest that catalyst deuteration is a promising strategy for enhancing the stability and performance of organocatalysts.
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Affiliation(s)
- Sei Murayama
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
| | - Zhurong Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Huatai Liang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Hiroshi Naka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
- Deuterium Science Research Unit Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, 606-8501, Japan
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
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Melillo A, Kiani A, Schettini R, Acocella MR. Carbon black intercalation compound as catalyst for unprecedent phase-transfer-catalyzed nucleophilic substitution (SN2) in water. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Quaternary Ammonium Salts Interact with Enolates and Sulfonates via Formation of Multiple +N-C-H Hydrogen Bonding Interactions. Catalysts 2022. [DOI: 10.3390/catal12070803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
We report herein sharp physical evidence, i.e., single-crystal X-ray diffraction and 1H-NMR spectral data, confirming that quaternary ammonium species interact with anions via a set of directional ion–dipole cooperative +N-C-H unusual H-bonding interactions and not via pure non-directional ionic electrostatic interactions. This finding, which has been often invoked by calculations, is herein substantiated by the preparation of two model compounds and an analysis of their X-ray crystal structures in the solid state and 1H-NMR spectra in solution. These observations are particularly pertinent for the rational design of novel catalyses and catalysts and providing guidance to an understanding of these species in solution and during asymmetric enantioselective catalysis.
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Chen L, Liang W. Phase-transfer catalyzed Michael/ammonolysis cascade reactions of enaminones and olefinic azlactones: a new approach to structurally diverse quinoline-2,5-diones. Org Biomol Chem 2022; 20:3201-3210. [PMID: 35352072 DOI: 10.1039/d2ob00096b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Michael/ammonolysis cascade reactions between cyclohexane-1,3-dione-derived enaminones and olefinic azlactones via phase-transfer catalysis have been developed. This method provides rapid access to a suite of architecturally complex and diverse quinoline-2,5-diones bearing a secondary amide group at the C-3 position in moderate to excellent yields (53-94%) and with excellent diastereoselectivities (>99 : 1 dr in most cases). The achievement of a preparative-scale reaction and the diverse product derivatization that can be obtained highlight the application potential of this protocol both in academic and industrial settings. An investigation of the reaction mechanism implies that tetrabutylammonium hydroxide may be the actual catalyst during this cascade reaction.
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Affiliation(s)
- Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. of China.
| | - Wei Liang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. of China.
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Visible light-promoted enantioselective aerobic oxidation of pyrazolones by phase transfer catalysis. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Lecourt M, Chietera G, Blerot B, Antoniotti S. Laccase-Catalyzed Oxidation of Allylbenzene Derivatives: Towards a Green Equivalent of Ozonolysis. Molecules 2021; 26:6053. [PMID: 34641596 PMCID: PMC8512103 DOI: 10.3390/molecules26196053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022] Open
Abstract
Laccase-based biocatalytic reactions have been tested with and without mediators and optimized in the oxidation of allylbenzene derivatives, such as methyl eugenol taken as a model substrate. The reaction primarily consisted in the hydroxylation of the propenyl side chain, either upon isomerization of the double bond or not. Two pathways were then observed; oxidation of both allylic alcohol intermediates could either lead to the corresponding α,β-unsaturated carbonyl compound, or the corresponding benzaldehyde derivative by oxidative cleavage. Such a process constitutes a green equivalent of ozonolysis or other dangerous or waste-generating oxidation reactions. The conversion rate was sensitive to the substitution patterns of the benzenic ring and subsequent electronic effects.
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Affiliation(s)
- Mathilde Lecourt
- Institut de Chimie de Nice, Université Côte d’Azur, CNRS, Parc Valrose, CEDEX 2, 06108 Nice, France;
| | - Giorgiana Chietera
- LMR Naturals by IFF, Parc d’Activité les Bois de Grasse, 18 Avenue Joseph Honoré Isnard, 06130 Grasse, France; (G.C.); (B.B.)
| | - Bernard Blerot
- LMR Naturals by IFF, Parc d’Activité les Bois de Grasse, 18 Avenue Joseph Honoré Isnard, 06130 Grasse, France; (G.C.); (B.B.)
| | - Sylvain Antoniotti
- Institut de Chimie de Nice, Université Côte d’Azur, CNRS, Parc Valrose, CEDEX 2, 06108 Nice, France;
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Deb B, Debnath S, Chakraborty A, Majumdar S. Bis-indolylation of aldehydes and ketones using silica-supported FeCl 3: molecular docking studies of bisindoles by targeting SARS-CoV-2 main protease binding sites. RSC Adv 2021; 11:30827-30839. [PMID: 35498942 PMCID: PMC9041420 DOI: 10.1039/d1ra05679d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/01/2021] [Indexed: 02/06/2023] Open
Abstract
We report herein an operationally simple, efficient and versatile procedure for the synthesis of bis-indolylmethanes via the reaction of indoles with aldehydes or ketones in the presence of silica-supported ferric chloride under grindstone conditions. The prepared supported catalyst was characterized by SEM and EDX spectroscopy. The present protocol has several advantages such as shorter reaction time, high yield, avoidance of using harmful organic solvents during the reaction and tolerance of a wide range of functional groups. Molecular docking studies targeted toward the binding site of SARS-CoV-2 main protease (3CLpro or Mpro) enzymes were investigated with the synthesized bis-indoles. Our study revealed that some of the synthesized compounds have potentiality to inhibit the SARS-CoV-2 Mpro enzyme by interacting with key amino acid residues of the active sites via hydrophobic as well as hydrogen bonding interactions.
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Affiliation(s)
- Barnali Deb
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-237-4802 +91-381-237-9070
| | - Sudhan Debnath
- Department of Chemistry, Netaji Subhash Mahavidalaya Tripura 799114 India
| | - Ankita Chakraborty
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-237-4802 +91-381-237-9070
| | - Swapan Majumdar
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-237-4802 +91-381-237-9070
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Loro C, Sala R, Penso M, Foschi F. DBU Catalysed Enantioselective Degradative Rearrangement: a Way to Tetrasubstituted 2‐Aryl‐2‐Amino Esters. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Camilla Loro
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
| | - Roberto Sala
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
| | - Michele Penso
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC) Via Golgi 19 IT-20133 Milano Italy
| | - Francesca Foschi
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
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Bencivenni G, Salazar Illera D, Moccia M, Houk KN, Izzo JA, Novacek J, Grieco P, Vetticatt MJ, Waser M, Adamo MFA. Study of Ground State Interactions of Enantiopure Chiral Quaternary Ammonium Salts and Amides, Nitroalkanes, Nitroalkenes, Esters, Heterocycles, Ketones and Fluoroamides. Chemistry 2021; 27:11352-11366. [PMID: 33963788 PMCID: PMC8453964 DOI: 10.1002/chem.202100908] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Indexed: 11/21/2022]
Abstract
Chiral phase-transfer catalysis provides high level of enantiocontrol, however no experimental data showed the interaction of catalysts and substrates. 1 H NMR titration was carried out on Cinchona and Maruoka ammonium bromides vs. nitro, carbonyl, heterocycles, and N-F containing compounds. It was found that neutral organic species and quaternary ammonium salts interacted via an ensemble of catalyst + N-C-H and (sp2 )C-H, specific for each substrate studied. The correspondent BArF salts interacted with carbonyls via a diverse set of + N-C-H and (sp2 )C-H compared to bromides. This data suggests that BArF ammonium salts may display a different enantioselectivity profile. Although not providing quantitative data for the affinity constants, the data reported proofs that chiral ammonium salts coordinate with substrates, prior to transition state, through specific C-H positions in their structures, providing a new rational to rationalize the origin of enantioselectivity in their catalyses.
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Affiliation(s)
- Grazia Bencivenni
- Department of ChemistryRCSIUniversity of Medicine and Health Science123 St Stephen's GreenDublin 2, DublinRepublic of Ireland
| | - Diana Salazar Illera
- Department of ChemistryRCSIUniversity of Medicine and Health Science123 St Stephen's GreenDublin 2, DublinRepublic of Ireland
| | - Maria Moccia
- CNR-ICCInstitute of CrystallographyVia G. Amendola 122/O70126BariItaly
| | - K. N. Houk
- Department of Chemistry and BiochemistryUniversity of California, Los AngelesLos AngelesCA 90095-1569USA
| | - Joseph A. Izzo
- Department of ChemistryState University of NY BinghamtonBinghamton, NYUSA
| | - Johanna Novacek
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Paolo Grieco
- Faculty of PharmacyUniversity of Naples Federico IICorso Umberto I, 4080138Napoli, NAItaly
| | | | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Mauro F. A. Adamo
- Department of ChemistryRCSIUniversity of Medicine and Health Science123 St Stephen's GreenDublin 2, DublinRepublic of Ireland
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11
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Chen L, Geng HY, Chen ZJ, Liang W, Jiao WY. Rapid entry to bispiro heterocycles merging five pharmacophores using phase-transfer catalysis. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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12
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Chen W, Tan CH, Wang H, Ye X. Molybdenum/Tungsten-Based Heteropoly Salts in Oxidations. Chem Asian J 2021; 16:2753-2772. [PMID: 34286908 DOI: 10.1002/asia.202100686] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/13/2021] [Indexed: 11/12/2022]
Abstract
Oxidation represents one of the most important and practical chemical transformations for both organic synthesis, material science and pharmaceutical area. Among the existing strategies, molybdenum/tungsten-based heteropoly salts involved oxidations with low-cost and environmentally benign terminal oxidant and thus have attracted considerable attention in recent years. In this review, we have summarized the recent development of heteropoly salts utilized in oxidations, mainly the peroxomolybdates and peroxotungstates. We wish to highlight the progress made in the past 20 years of this field. Three categories are classified according to the aggregation state of metal oxides. Special attention is paid to the catalytically active peroxometalate species generated during the oxidation process. It is helpful to shed light on the common features that enable highly efficient and selective oxidations. We aim to inspire fellow chemists to explore more functional metalates for catalytic oxidations, especially asymmetric versions. Meanwhile, we attempt to understand the design principles for the discovery of more efficient, selective and economical catalytic systems.
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Affiliation(s)
- Wenchao Chen
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, P. R. China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Hong Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, P. R. China.,Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou, 310014, P. R. China
| | - Xinyi Ye
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, P. R. China
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Wang Y, Wang S, Qiu P, Fang L, Wang K, Zhang Y, Zhang C, Zhao T. Asymmetric α-electrophilic difluoromethylation of β-keto esters by phase transfer catalysis. Org Biomol Chem 2021; 19:4788-4795. [PMID: 33982742 DOI: 10.1039/d1ob00511a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An efficient and enantioselective α-electrophilic difluoromethylation of β-keto esters has been achieved by phase-transfer catalysis. This procedure is applicable to different kinds of β-keto esters with a series of cinchona-derived C-2' aryl-substituted phase-transfer catalysts. The reaction gives the corresponding products in good enantioselectivities (up to 83% ee) and yields (up to 92%) with high C/O regioselectivities (up to 98 : 2). Moreover, the C/O selectivity of β-keto esters could be easily reversed and controlled. This asymmetric difluoromethylation provided a novel and efficient way for introducing chiral C-CF2H groups.
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Affiliation(s)
- Yakun Wang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Shuaifei Wang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Peiyong Qiu
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Lizhen Fang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Ke Wang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Yawei Zhang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Conghui Zhang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
| | - Ting Zhao
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China.
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Gambacorta G, Sharley JS, Baxendale IR. A comprehensive review of flow chemistry techniques tailored to the flavours and fragrances industries. Beilstein J Org Chem 2021; 17:1181-1312. [PMID: 34136010 PMCID: PMC8182698 DOI: 10.3762/bjoc.17.90] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/22/2021] [Indexed: 12/28/2022] Open
Abstract
Due to their intrinsic physical properties, which includes being able to perform as volatile liquids at room and biological temperatures, fragrance ingredients/intermediates make ideal candidates for continuous-flow manufacturing. This review highlights the potential crossover between a multibillion dollar industry and the flourishing sub-field of flow chemistry evolving within the discipline of organic synthesis. This is illustrated through selected examples of industrially important transformations specific to the fragrances and flavours industry and by highlighting the advantages of conducting these transformations by using a flow approach. This review is designed to be a compendium of techniques and apparatus already published in the chemical and engineering literature which would constitute a known solution or inspiration for commonly encountered procedures in the manufacture of fragrance and flavour chemicals.
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Affiliation(s)
- Guido Gambacorta
- Department of Chemistry, University of Durham, Stockton Road, Durham, DH1 3LE, United Kingdom
| | - James S Sharley
- Department of Chemistry, University of Durham, Stockton Road, Durham, DH1 3LE, United Kingdom
| | - Ian R Baxendale
- Department of Chemistry, University of Durham, Stockton Road, Durham, DH1 3LE, United Kingdom
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15
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Chen Z, Liang W, Chen Z, Chen L. Phase‐Transfer Catalytic Strategy: Rapid Synthesis of Spiro‐Fused Heterocycles, Integrated with Four Pharmacophores‐Succinimide, Pyrrolidine, Oxindole, and Trifluoromethyl Group. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001409] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Zheng‐Jun Chen
- School of Chemistry and Materials Science Guizhou Normal University 116 Baoshan North Road Guiyang P. R. of China
| | - Wei Liang
- School of Chemistry and Materials Science Guizhou Normal University 116 Baoshan North Road Guiyang P. R. of China
| | - Zhuo Chen
- School of Chemistry and Materials Science Guizhou Normal University 116 Baoshan North Road Guiyang P. R. of China
| | - Lin Chen
- School of Chemistry and Materials Science Guizhou Normal University 116 Baoshan North Road Guiyang P. R. of China
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16
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A flexible strategy for the synthesis of bifunctional 6′-(thio)-urea containing Cinchona alkaloid ammonium salts. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Herrera C, Pinto‐Neira J, Fuentealba D, Sepúlveda C, Rosenkranz A, García‐Fierro JL, González M, Escalona N. Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions. ChemCatChem 2020. [DOI: 10.1002/cctc.202001045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- C. Herrera
- Departamento de Química física Facultad de Química y Farmacia Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul, Santiago Chile
- ANID – Millennium Science Initiative Program-Millennium Nuclei on Catalytic Process towards Sustainable Chemistry (CSC), Av. Vicuña Mackenna 4860 Macul, Santiago Chile
| | - J. Pinto‐Neira
- Departamento de Química física Facultad de Química y Farmacia Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul, Santiago Chile
- ANID – Millennium Science Initiative Program-Millennium Nuclei on Catalytic Process towards Sustainable Chemistry (CSC), Av. Vicuña Mackenna 4860 Macul, Santiago Chile
| | - D. Fuentealba
- Departamento de Química física Facultad de Química y Farmacia Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul, Santiago Chile
| | - C. Sepúlveda
- ANID – Millennium Science Initiative Program-Millennium Nuclei on Catalytic Process towards Sustainable Chemistry (CSC), Av. Vicuña Mackenna 4860 Macul, Santiago Chile
- Facultad de Ciencias Químicas Universidad de Concepción Chile
- Casilla 160 C Universidad de Concepción Concepción Chile
| | - A. Rosenkranz
- Departamento de Ingeniería Química Biotecnología y Materiales Facultad de Ciencias Físicas y Matemáticas Universidad de Chile Av. Beaucheff 851 Santiago Chile
| | - J. L. García‐Fierro
- Instituto de Catálisis y Petroleoquímica CSIC C/Marie Curie 2, Cantoblanco Madrid Spain
| | - M. González
- Departamento de Ingeniería y gestión de la construcción Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul, Santiago Chile
| | - N. Escalona
- Departamento de Química física Facultad de Química y Farmacia Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul, Santiago Chile
- ANID – Millennium Science Initiative Program-Millennium Nuclei on Catalytic Process towards Sustainable Chemistry (CSC), Av. Vicuña Mackenna 4860 Macul, Santiago Chile
- Departamento de Ingeniería Química y Bioprocesos Escuela de Ingeniería Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul, Santiago Chile
- Unidad de Desarrollo Tecnológico Universidad de Concepción Avenida Cordillera N° 3624, Parque Industrial Coronel Coronel, Concepciòn Chile
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Sun Y, Ni L, Papadaki M, Jiao Z, Zhu W, Jiang J, Mashuga C, Mannan MS, Wilhite B. Reaction hazard and mechanism study of H2O2 oxidation of 2-butanol to methyl ethyl ketone using DSC, Phi-TEC II and GC-MS. J Loss Prev Process Ind 2020. [DOI: 10.1016/j.jlp.2020.104177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Wang CH, Liu CF, Rao GW. Green Application of Phase-Transfer Catalysis in Oxidation: A Comprehensive Review. MINI-REV ORG CHEM 2020. [DOI: 10.2174/1570193x16666190617154733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Oxidation reactions have emerged as one of the most versatile tools in organic chemistry.
Various onium salts such as ammonium, phosphonium, arsonium, bismuthonium, tellurium have
been used as phase transfer catalysts in many oxidation reactions. Certainly, considerable catalysts
have been widely used in Phase-Transfer Catalysis (PTC). This review focuses on the application of
PTC in various oxidation reaction. Furthermore, PTC also conforms to the concept of “Green Chemistry”.
<p></p>
• Oxidation has become one of the most widely used tools in organic chemistry and phase transfer
catalysts has been widely used in oxidation.
<p></p>
• The application of phase transfer catalysts in oxidation reaction will be summarized.
<p></p>
• Phase transfer catalysts have important application in various oxidation reaction.
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Affiliation(s)
- Chuan-Hui Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Chen-Fu Liu
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, China
| | - Guo-Wu Rao
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
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20
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Meninno S, Villano R, Lattanzi A. Recent developments in stereoselective organocatalytic oxyfunctionalizations. PHYSICAL SCIENCES REVIEWS 2020. [DOI: 10.1515/psr-2018-0095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Abstract
In this chapter, asymmetric at carbon oxidations using organocatalytic systems reported from 2012 up to 2018 have been illustrated. Asymmetric epoxidations and oxidation of heteroatom-containing molecules were not included. The processes selected encopass alpha-hydroxylation of carbonyl compounds, dihydroxylation and dioxygenation of alkenes, Baeyer-Villiger and oxidative desymmetrization reactions.
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Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli” , Università di Salerno , via Giovanni Paolo II 132 , Fisciano 84084 , Italy
| | - Rosaria Villano
- Istituto di Chimica Biomolecolare , Consiglio Nazionale delle Ricerche , via Campi Flegrei 34 , Pozzuoli 80078 , Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli” , Università di Salerno , via Giovanni Paolo II 132 , Fisciano 84084 , Italy
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21
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Eitzinger A, Brière JF, Cahard D, Waser M. Enantioselective catalytic synthesis of α-aryl-α-SCF 3-β 2,2-amino acids. Org Biomol Chem 2020; 18:405-408. [PMID: 31915785 PMCID: PMC6989214 DOI: 10.1039/c9ob02666e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We herein report a novel entry towards chiral α-SCF3-β2,2-amino acids by carrying out the ammonium salt-catalyzed α-trifluoromethylthiolation of isoxazolidin-5-ones. This approach allowed for high enantioselectivities and high yields and the obtained heterocycles proved to be versatile platforms to access other targets of potential interest.
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Affiliation(s)
- Andreas Eitzinger
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria
| | | | - Dominique Cahard
- CNRS, UMR 6014 COBRA, Normandie Univ, UNIROUEN, INSA Rouen, 76000 Rouen, France
| | - Mario Waser
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria
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22
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Hull KL, Schipper DE, Oliver AG. Synthesis and structural characterization of CO 2-soluble oxidizers [Bu 4N]BrO 3 and [Bu 4N]ClO 3 and their dissolution in cosolvent-modified CO 2 for reservoir applications. RSC Adv 2020; 10:44973-44980. [PMID: 35516229 PMCID: PMC9058644 DOI: 10.1039/d0ra09563j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/25/2021] [Accepted: 12/01/2020] [Indexed: 12/15/2022] Open
Abstract
CO2 utilization in upsteam oil and gas applications requires CO2-soluble additives such as polymers, surfactants, and other components. Here we report the facile synthesis of CO2-soluble oxidizers composed of judiciously selected organic cations paired with oxidizing anions. [Bu4N]BrO3 and [Bu4N]ClO3 are prepared using a double displacement synthetic strategy, whereby the crystalline product is readily obtained in high yield and structurally characterized using single-crystal X-ray diffraction. The facility of the approach is demonstrated through the preparation of several additional alkylammonium bromate compounds. Static solubility studies using a high-pressure cell with viewing windows showed that tetrabutylammonium compounds could be solubilized using cosolvent-modified CO2. Using 4 mol% ethanol as cosolvent, >3 mM [Bu4N]BrO3 could be dissolved in CO2, while ∼0.75 mM [Bu4N]ClO3 could be dissolved in the same solvent system. The solubility properties of [Bu4N]BrO3 along with its thermal stability up to ∼200 °C suggest that it is a promising oilfield oxidizer that can be utilized in subterranean CO2 applications. Bromate and chlorate salts were hydrophobically modified with tetrabutylammonium to yield oxidizers that are soluble in CO2-cosolvent mixtures.![]()
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Affiliation(s)
| | | | - Allen G. Oliver
- The Department of Chemistry and Biochemistry
- University of Notre Dame
- USA
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23
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Eitzinger A, Winter M, Schörgenhumer J, Waser M. Quaternary β 2,2-amino acid derivatives by asymmetric addition of isoxazolidin-5-ones to para-quinone methides. Chem Commun (Camb) 2019; 56:579-582. [PMID: 31830176 DOI: 10.1039/c9cc09239k] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The highly enantioselective (>99.5% ee) synthesis of a new class of densely functionalized β2,2-amino acid derivatives by reacting isoxazolidin-5-ones with para-quinone methides in the presence of chiral ammonium salt phase-transfer catalysts was developed. The reaction proceeds with exceptionally low catalyst loadings down to 20 ppm on gram scale and the utilization of the primary addition products towards further manipulations was demonstrated for selected examples.
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Affiliation(s)
- Andreas Eitzinger
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
| | - Michael Winter
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
| | - Johannes Schörgenhumer
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
| | - Mario Waser
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
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24
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Winter M, Kim H, Waser M. Pd-Catalyzed Allylation of Imines to Access α-CF 3-Substituted α-Amino Acid Derivatives. European J Org Chem 2019; 2019:7122-7127. [PMID: 31798337 PMCID: PMC6887540 DOI: 10.1002/ejoc.201901272] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Indexed: 01/06/2023]
Abstract
We herein report a high yielding protocol for the direct α-allylation of easily accessible trifluoropyruvate-derived imines using Pd-catalysis. The reaction gives access to a variety of different α-allylated-α-CF3-amino acids in a straightforward manner, starting from commercially available trifluoropyruvate. We also provide a proof-of-concept for an enantioselective protocol (up to er = 75:25) by using chiral phosphane ligands.
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Affiliation(s)
- Michael Winter
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstr. 694040LinzAustria
| | - Hyunwoo Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology291 Daehak‐ro34141DaejeonYuseong‐guRepublic of Korea
| | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstr. 694040LinzAustria
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25
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Wang Y, Wang S, Gao Q, Li L, Zhi H, Zhang T, Zhang J. Transition-metal, organic solvent and base free α-hydroxylation of β-keto esters and β-keto amides with peroxides in water. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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26
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Zhao H, Li Z, Jin J. Green oxidant H2O2 as a hydrogen atom transfer reagent for visible light-mediated Minisci reaction. NEW J CHEM 2019. [DOI: 10.1039/c9nj03106e] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A metal-free protocol for oxidative coupling of heteroarenes and aliphatic C–H components has been achieved via a radical pathway.
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Affiliation(s)
- Hong Zhao
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
| | - Zhenlong Li
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
| | - Jian Jin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
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27
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Wang Y, Li Y, Lian M, Zhang J, Liu Z, Tang X, Yin H, Meng Q. Asymmetric α-alkylation of cyclic β-keto esters and β-keto amides by phase-transfer catalysis. Org Biomol Chem 2019; 17:573-584. [DOI: 10.1039/c8ob02669f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A facile and efficient asymmetric α-alkylation of β-keto esters and β-keto amides has been achieved by phase-transfer catalysis.
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Affiliation(s)
- Yakun Wang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Yueyun Li
- Xinxiang Central Hospital
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Mingming Lian
- Department of Pharmaceutics
- Daqing Campus
- Harbin Medical University
- Daqing
- P. R. China
| | - Jixia Zhang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Zhaomin Liu
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Xiaofei Tang
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian
- P. R. China
| | - Hang Yin
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian
- P. R. China
| | - Qingwei Meng
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian
- P. R. China
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28
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Cousin T, Chatel G, Kardos N, Andrioletti B, Draye M. Recent trends in the development of sustainable catalytic systems for the oxidative cleavage of cycloalkenes by hydrogen peroxide. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01269a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This review proposes a comprehensive, critical, and accessible assessment of reaction conditions for cycloolefin oxidative cleavage regarding green chemistry criteria.
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Affiliation(s)
- Tony Cousin
- LCME
- Univ. Savoie Mont Blanc
- 73000 Chambéry
- France
- Univ Lyon
| | | | | | - Bruno Andrioletti
- Univ Lyon
- Université Claude Bernard Lyon 1
- INSA-Lyon
- CPE-Lyon
- ICBMS-UMR CNRS 5246
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29
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Qiu H, Liang W, Zhang G, Lin M, Liu W, Gao Z, Wei W, Tang C, Jin H, Liang H, Yan X. Aerobic Oxidation of Methyl‐substituted
β
‐Carbolines Catalyzed by N‐Hydroxyphthalimide and Metal Catalyst. ChemistrySelect 2018. [DOI: 10.1002/slct.201803007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Hongda Qiu
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Weida Liang
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
- Present address: Department of ChemistryPurdue University West Lafayette, IN 47907 USA
| | - Gongjun Zhang
- Ningbo Institute of Industrial TechnologyChinese Academy of Sciences, Ningbo Zhejiang 315201 P. R. China
| | - Miaoman Lin
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Wanmin Liu
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Zhanghua Gao
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Wenting Wei
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Chunlan Tang
- School of MedicineNingbo University, Ningbo Zhejiang 315211 P. R. Chinan
| | - Haixiao Jin
- School of Marine SciencesNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Hongze Liang
- School of Materials Science and Chemical EngineeringNingbo University, Ningbo Zhejiang 315211 P. R. China
| | - Xiaojun Yan
- School of Marine SciencesNingbo University, Ningbo Zhejiang 315211 P. R. China
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30
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Capaccio V, Zielke K, Eitzinger A, Massa A, Palombi L, Faust K, Waser M. Asymmetric phase-transfer catalysed β-addition of isoxazolidin-5-ones to MBH carbonates. Org Chem Front 2018; 5:3336-3340. [PMID: 30505454 PMCID: PMC6261335 DOI: 10.1039/c8qo01057a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel high yielding, enantio- and diastereoselective protocol for the synthesis of α-allylated highly functionalised β-amino acid derivatives by adding isoxazolidin-5-ones to MBH carbonates under asymmetric phase-transfer catalysis has been developed.
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Affiliation(s)
- Vito Capaccio
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy
| | - Katharina Zielke
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | - Andreas Eitzinger
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | - Antonio Massa
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy
| | - Laura Palombi
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy
| | - Kirill Faust
- Institute of Catalysis, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
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31
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Abstract
Phase-transfer catalysts (PTCs), currently, are one of the most important tools of chemists for performing organic reactions. PTCs accelerate several types of reactions in biphasic systems, giving excellent yields of the desired product. Most of the PTCs belong to the general formula NR4+X-. In the recent past, several compounds possessing a novel scaffold with the general formula NL2+X- have been reported as PTCs. In the NL2+ species, a nitrogen atom with a formal positive charge accepts electron density from electron-donating ligands. Electronic structure studies reported in the literature confirmed the possibility of L → N coordination (donor-acceptor) interactions in these species, and thus, this class of compounds are known as divalent NI compounds. These species are reported to exhibit better catalytic potential in comparison to the traditional NR4+ systems. Some of the NL2+ systems are found to be useful in asymmetric phase-transfer catalysis. Thus, these systems offer extensive opportunities for exploring the catalytic properties and novel mechanistic aspects associated with their unique electronic structure. In this paper, the synthesis, electronic, and structural properties and the applications in catalysis of the NL2+-based PTCs are reviewed with their bright future scope in catalytic organic chemistry.
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Affiliation(s)
- Neha Patel
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, Sahibzada Ajit Singh Nagar 160 062 , Punjab , India
| | - Radhika Sood
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, Sahibzada Ajit Singh Nagar 160 062 , Punjab , India
| | - Prasad V Bharatam
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, Sahibzada Ajit Singh Nagar 160 062 , Punjab , India
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32
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High-efficiency α-benzoyloxylation and hydroxylation of β-keto amides by phase transfer catalysis. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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33
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Lee HJ, Eun B, Sung E, Hwang GT, Ko YK, Cho CW. Catalytic enantioselective synthesis of carboxy-substituted 2-isoxazolines by cascade oxa-Michael-cyclization. Org Biomol Chem 2018; 16:657-664. [PMID: 29303197 DOI: 10.1039/c7ob02722b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An efficient quinidine-based phase-transfer-catalyzed enantioselective cascade oxa-Michael-cyclization reaction of hydroxylamine with various β-carboxy-substituted α,β-unsaturated ketones has been achieved for the preparation of chiral carboxy-substituted 2-isoxazolines. This cascade reaction provided the desired products in good yields (up to 98%) with excellent enantioselectivities (91-96% ee). In addition, the cascade reaction was effectively applied to the first catalytic asymmetric synthesis of the herbicide (S)-methiozolin.
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Affiliation(s)
- Hyo-Jun Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
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34
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Zhu J, Cui D, Li Y, He J, Chen W, Wang P. Enantioselective amination of nitroolefins under base-free and water-rich conditions using chiral bifunctional phase-transfer catalysts. Org Biomol Chem 2018; 16:3012-3017. [PMID: 29633771 DOI: 10.1039/c8ob00583d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective amination of nitroolefins was realized with l-tert-leucine derived squaramide-scaffold bifunctional phase-transfer catalysts under base-free and water-rich conditions.
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Affiliation(s)
- Junchao Zhu
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Dongxiao Cui
- Department of Authentication of Traditional Chinese Medicine
- College of Pharmacy
- Shaanxi University of Chinese Medicine
- Xiyang
- P. R. China
| | - Yuedan Li
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Jingxu He
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Weiping Chen
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Pingan Wang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
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35
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Vanoye L, Yehouenou L, Philippe R, de Bellefon C, Fongarland P, Favre-Réguillon A. Continuous flow oxidation of benzylic and aliphatic alcohols using bleach: process improvement by precise pH adjustment in flow with CO2. REACT CHEM ENG 2018. [DOI: 10.1039/c7re00155j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Commercial bleach neutralization using CO2 enhanced the oxidation rate of benzylic and aliphatic alcohols to their corresponding aldehydes and ketones.
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Affiliation(s)
- Laurent Vanoye
- Univ. Lyon
- Laboratoire de Génie des Procédés Catalytiques
- UMR 5285 CNRS
- CPE Lyon
- Université Claude Bernard Lyon 1
| | - Laurelle Yehouenou
- Univ. Lyon
- Laboratoire de Génie des Procédés Catalytiques
- UMR 5285 CNRS
- CPE Lyon
- Université Claude Bernard Lyon 1
| | - Régis Philippe
- Univ. Lyon
- Laboratoire de Génie des Procédés Catalytiques
- UMR 5285 CNRS
- CPE Lyon
- Université Claude Bernard Lyon 1
| | - Claude de Bellefon
- Univ. Lyon
- Laboratoire de Génie des Procédés Catalytiques
- UMR 5285 CNRS
- CPE Lyon
- Université Claude Bernard Lyon 1
| | - Pascal Fongarland
- Univ. Lyon
- Laboratoire de Génie des Procédés Catalytiques
- UMR 5285 CNRS
- CPE Lyon
- Université Claude Bernard Lyon 1
| | - Alain Favre-Réguillon
- Univ. Lyon
- Laboratoire de Génie des Procédés Catalytiques
- UMR 5285 CNRS
- CPE Lyon
- Université Claude Bernard Lyon 1
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36
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Synthesis of alkyl α- and β-d-glucopyranoside-based chiral crown ethers and their application as enantioselective phase-transfer catalysts. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3189-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Schörgenhumer J, Tiffner M, Waser M. Chiral phase-transfer catalysis in the asymmetric α-heterofunctionalization of prochiral nucleophiles. Beilstein J Org Chem 2017; 13:1753-1769. [PMID: 28904619 PMCID: PMC5588627 DOI: 10.3762/bjoc.13.170] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 08/10/2017] [Indexed: 01/10/2023] Open
Abstract
Chiral phase-transfer catalysis is one of the major catalytic principles in asymmetric catalysis. A broad variety of different catalysts and their use for challenging applications have been reported over the last decades. Besides asymmetric C–C bond forming reactions the use of chiral phase-transfer catalysts for enantioselective α-heterofunctionalization reactions of prochiral nucleophiles became one of the most important field of application of this catalytic principle. Based on several highly spectacular recent reports, we thus wish to discuss some of the most important achievements in this field within the context of this review.
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Affiliation(s)
- Johannes Schörgenhumer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Maximilian Tiffner
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
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38
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Zong L, Tan CH. Phase-Transfer and Ion-Pairing Catalysis of Pentanidiums and Bisguanidiniums. Acc Chem Res 2017; 50:842-856. [PMID: 28379012 DOI: 10.1021/acs.accounts.6b00604] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Catalysts accelerate biological processes and organic reactions in a controlled and selective fashion. There are continuing efforts in asymmetric catalysis to develop efficient catalysts with broad reaction scope and industrial practicability. Among the various modes of asymmetric catalysis, phase-transfer catalysis has attracted intense interest due to its facile scale up and low catalyst loading. Chiral quaternary ammonium and phosphonium salts are well-studied classes of chiral phase-transfer catalysts, and they are typically composed of sp3-hybridized quaternary onium salts. In this Account, we describe our recent attempts to develop N-sp2-hybridized guanidinium-type salts as efficient phase-transfer catalysts as well as ion-pair catalysis based on N-sp2 hybridized bisguanidinium-type salts. The sp2-quaternized ammonium salts, pentanidiums, which contain five nitrogen atoms in conjugation, displayed remarkable phase-transfer catalytic efficiency. We have shown that pentanidium can catalyze Michael additions of tert-butyl glycinate-benzophenone Schiff bases with various α,β-unsaturated acceptors, such as vinyl ketones, acrylates, and chalcones, in high enantioselectivities. The structurally amendable pentanidium phase-transfer catalysts supply diverse reactivity and selectivity to various other organic transformations, such as α-hydroxylation of 3-substituted-2-oxindoles, Michael addition of 3-alkyloxindoles with vinyl sulfone, and alkylation reactions of sulfenate anions and dihydrocoumarins. Pentanidium salts are applicable to enantioselective transformations on a preparative scale at low catalyst loading, allowing for the synthesis of a broad range of enantiopure compounds. From computational and experimental results, we also proposed that the halogenated pentanidium catalysts participated in halogen bonding and that this contributed to the excellent stereocontrol in alkylation reactions. Subsequently, we determined that chiral cations can direct functional anions besides basic anions in traditional Brønsted basic phase-transfer reactions, including metal-centered anions. We identified dicationic bisguanidinium as an excellent ion-pairing catalyst, first demonstrating that bisguanidinium formed an ion pair with permanganate and directed the anion in enantioselective dihydroxylation and oxohydroxylation of a,β-unsaturated esters. This initial success led us to explore chiral cationic ion-pairing catalysis as a general mode of catalysis. This mode of catalysis is at the interphase between organocatalysis, phase-transfer catalysis and organometallic catalysis. We then identified bisguanidinium diphosphatobisperoxotungstate and bisguanidinium dinuclear oxodiperoxomolybdosulfate ion pairs as the active catalysts in enantioselective sulfoxidations using aqueous H2O2 as the oxidant. The structure of the bisguanidinium dinuclear oxodiperoxomolybdosulfate ion pair was elucidated using single-crystal X-ray analysis. Bisguanidinium-catalyzed sulfoxidations emerged as a practical methodology for the synthesis of enantioenriched sulfoxides including armodafinil and lansoprazole, which are commercial drugs. Finally, we are also able to show that pentanidium and bisguanidinium hypervalent silicates are intermediates in enantioselective alkylations using silylamide as a Brønsted probase.
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Affiliation(s)
- Lili Zong
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Choon-Hong Tan
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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Yan X, Cheng H, Zare RN. Two‐Phase Reactions in Microdroplets without the Use of Phase‐Transfer Catalysts. Angew Chem Int Ed Engl 2017; 56:3562-3565. [DOI: 10.1002/anie.201612308] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/06/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Xin Yan
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305-5080 USA
| | - Heyong Cheng
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305-5080 USA
| | - Richard N. Zare
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305-5080 USA
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40
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Yan X, Cheng H, Zare RN. Two‐Phase Reactions in Microdroplets without the Use of Phase‐Transfer Catalysts. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612308] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xin Yan
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305-5080 USA
| | - Heyong Cheng
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305-5080 USA
| | - Richard N. Zare
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305-5080 USA
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41
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Porosa L, Deng H, Bedard J, Lough AJ, Wolfaardt G, Foucher DA. A C18Quaternary Ammonium Library. ChemistrySelect 2016. [DOI: 10.1002/slct.201601540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lukasz Porosa
- Department of Chemistry and Biology; Ryerson University; 350 Victoria Street Toronto, ON Canada M5B 2 K3
| | - Hellen Deng
- Department of Chemistry and Biology; Ryerson University; 350 Victoria Street Toronto, ON Canada M5B 2 K3
| | - Joseph Bedard
- Department of Chemistry and Biology; Ryerson University; 350 Victoria Street Toronto, ON Canada M5B 2 K3
| | - Alan J. Lough
- Department of Chemistry; University of Toronto; 80 St. George Street Toronto Ontario Canada M5S-3H6
| | - Gideon Wolfaardt
- Department of Chemistry and Biology; Ryerson University; 350 Victoria Street Toronto, ON Canada M5B 2 K3
| | - Daniel A. Foucher
- Department of Chemistry and Biology; Ryerson University; 350 Victoria Street Toronto, ON Canada M5B 2 K3
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42
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Solventless Synthesis of Quaterphenyls and Terphenyls from Chalcones and Allylsulfones under Phase Transfer Catalysis Conditions. Catalysts 2016. [DOI: 10.3390/catal6090142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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