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Lemcoff N, Nechmad NB, Eivgi O, Yehezkel E, Shelonchik O, Phatake RS, Yesodi D, Vaisman A, Biswas A, Lemcoff NG, Weizmann Y. Plasmonic visible-near infrared photothermal activation of olefin metathesis enabling photoresponsive materials. Nat Chem 2023; 15:475-482. [PMID: 36702882 DOI: 10.1038/s41557-022-01124-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 12/13/2022] [Indexed: 01/27/2023]
Abstract
Light-induced catalysis and thermoplasmonics are promising fields creating many opportunities for innovative research. Recent advances in light-induced olefin metathesis have led to new applications in polymer and material science, but further improvements to reaction scope and efficiency are desired. Herein, we present the activation of latent ruthenium-based olefin metathesis catalysts via the photothermal response of plasmonic gold nanobipyramids. Simple synthetic control over gold nanobipyramid size results in tunable localized surface plasmon resonance bands enabling catalyst initiation with low-energy visible and infrared light. This approach was applied to the ROMP of dicyclopentadiene, affording plasmonic polymer composites with exceptional photoresponsive and mechanical properties. Moreover, this method of catalyst activation was proven to be remarkably more efficient than activation through conventional heating in all the metathesis processes tested. This study paves the way for providing a wide range of photoinduced olefin metathesis processes in particular and photoinduced latent organic reactions in general by direct photothermal activation of thermally latent catalysts.
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Affiliation(s)
- Nir Lemcoff
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Noy B Nechmad
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Or Eivgi
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Elad Yehezkel
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ofir Shelonchik
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ravindra S Phatake
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Doron Yesodi
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Anna Vaisman
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Aritra Biswas
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - N Gabriel Lemcoff
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
- Ilse Katz Institute for Nanotechnology Science, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yossi Weizmann
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
- Ilse Katz Institute for Nanotechnology Science, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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2
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Reaction of 3-Acetylcoumarin: From Methods to Mechanism. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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3
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Abdou MM, O'Neill PM, Amigues E, Matziari M. Structure-based bioisosteric design, synthesis and biological evaluation of novel pyrimidines as antiplasmodial antifolate agents. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2022.101539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Masoud SM, Vorobyeva DV, Petropavlovskikh DA, Bruneau C, Osipov SN. Fluorine-containing ruthenium-based olefin metathesis catalysts. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The review summarizes literature data on the methods for the introduction of fluorine atoms and fluoralkyl groups into different ligands to construct metathesis-active ruthenium carbene complexes. It also analyzes the influence of fluorinated ligands on the catalytic activity of the complexes. The choice, structure and positions of fluorinated substituents in NHC ligands are generally dictated by the desire to increase the electrophilicity of the ruthenium atom due to the electron-withdrawing effect of fluorine atoms and fluoroalkyl groups, resulting, as a rule, in an increase in the activity of the ruthenium complex. In catalysts with unsymmetrical fluorine-containing NHC ligands, there is a possibility of additional Ru–F coordination, making the complexes much more stable and, consequently, more active. The presence of fluorine in chelating alkylidene ligands provides an increase in the catalyst initiation rate due to a weakening of the ruthenium – heteroatom bond. Besides, the introduction of polyfluoroalkyl groups into ligands solves the problem of catalyst recovery using fluorous biphasic systems for reuse.
The bibliography includes 172 references.
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5
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Nechmad NB, Kobernik V, Tarannam N, Phatake R, Eivgi O, Kozuch S, Lemcoff NG. Reactivity and Selectivity in Ruthenium Sulfur‐Chelated Diiodo Catalysts. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Noy B. Nechmad
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - Victoria Kobernik
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - Naziha Tarannam
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - Ravindra Phatake
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - Or Eivgi
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - Sebastian Kozuch
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - N. Gabriel Lemcoff
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
- Ilse Katz Institute for Nanotechnology Science Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
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6
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Kalaitzakis D, Bosveli A, Sfakianaki K, Montagnon T, Vassilikogiannakis G. Multi-Photocatalyst Cascades: Merging Singlet Oxygen Photooxygenations with Photoredox Catalysis for the Synthesis of Alkaloid Frameworks. Angew Chem Int Ed Engl 2021; 60:4335-4341. [PMID: 33119205 DOI: 10.1002/anie.202012379] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/02/2020] [Indexed: 12/13/2022]
Abstract
The development of photocascades that rapidly transform simple and readily accessible furan substrates into polycyclic alkaloid frameworks or erythrina natural products is described. Each of the sequences developed makes use of photocatalyzed energy transfer processes, which generate singlet oxygen, to set up the substrates for the second photocatalyzed reaction, wherein electron transfer generates carbon-centered radicals for the cyclizations that give the final complex frameworks. A chemical switch has been developed that can "switch off" one photocatalyst; thus, allowing a second photocatalyst to take over control of the sequence. As a corollary, this strategy represents the first time it has been possible to use multiple photocatalysts in photocascades, and, as such, it expands significantly the reactions that can be included in such cascades and the order in which they can be initiated.
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Affiliation(s)
- Dimitris Kalaitzakis
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003, Iraklion, Crete, Greece
| | - Artemis Bosveli
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003, Iraklion, Crete, Greece
| | - Kalliopi Sfakianaki
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003, Iraklion, Crete, Greece
| | - Tamsyn Montagnon
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003, Iraklion, Crete, Greece
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Kalaitzakis D, Bosveli A, Sfakianaki K, Montagnon T, Vassilikogiannakis G. Multi‐Photocatalyst Cascades: Merging Singlet Oxygen Photooxygenations with Photoredox Catalysis for the Synthesis of Alkaloid Frameworks. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Dimitris Kalaitzakis
- Department of Chemistry University of Crete Vasilika Vouton 71003 Iraklion Crete Greece
| | - Artemis Bosveli
- Department of Chemistry University of Crete Vasilika Vouton 71003 Iraklion Crete Greece
| | - Kalliopi Sfakianaki
- Department of Chemistry University of Crete Vasilika Vouton 71003 Iraklion Crete Greece
| | - Tamsyn Montagnon
- Department of Chemistry University of Crete Vasilika Vouton 71003 Iraklion Crete Greece
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8
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Nechmad NB, Kobernik V, Tarannam N, Phatake R, Eivgi O, Kozuch S, Lemcoff NG. Reactivity and Selectivity in Ruthenium Sulfur-Chelated Diiodo Catalysts. Angew Chem Int Ed Engl 2021; 60:6372-6376. [PMID: 33576565 DOI: 10.1002/anie.202014929] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/12/2020] [Indexed: 12/18/2022]
Abstract
A trifluoromethyl sulfur-chelated ruthenium benzylidene, Ru-S-CF3 -I, was synthesized and characterized. This latent precatalyst provides a distinct activity and selectivity profiles for olefin metathesis reactions depending on the substrate. For example, 1,3-divinyl-hexahydropentalene derivatives were efficiently obtained by ring-opening metathesis (ROM) of dicyclopentadiene (DCPD). Ru-S-CF3 -I also presented a much more effective photoisomerization process from the inactive cis-diiodo to the active trans-diiodo configuration after exposure to 510 nm (green light), allowing for a wide scope of photoinduced olefin metathesis reactions. DFT calculations suggest a faster formation and enhanced stability of the active trans-diiodo species of Ru-S-CF3 -I compared with Ru-S-Ph-I, explaining its higher reactivity. In addition, the photochemical release of chloride anions by irradiation of Cl-BODIPY in the presence of DCPD derivatives with diiodo Ru benzylidenes, led to in situ generation of chloride complexes, which quickly produced the corresponding cross-linked polymers. Thus, novel selective pathways that use visible light to guide olefin metathesis based synthetic sequences is presented.
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Affiliation(s)
- Noy B Nechmad
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Victoria Kobernik
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Naziha Tarannam
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Ravindra Phatake
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Or Eivgi
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Sebastian Kozuch
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - N Gabriel Lemcoff
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel.,Ilse Katz Institute for Nanotechnology Science, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
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9
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Annunziata F, Pinna C, Dallavalle S, Tamborini L, Pinto A. An Overview of Coumarin as a Versatile and Readily Accessible Scaffold with Broad-Ranging Biological Activities. Int J Mol Sci 2020; 21:E4618. [PMID: 32610556 PMCID: PMC7370201 DOI: 10.3390/ijms21134618] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/22/2020] [Accepted: 06/28/2020] [Indexed: 12/19/2022] Open
Abstract
Privileged structures have been widely used as an effective template for the research and discovery of high value chemicals. Coumarin is a simple scaffold widespread in Nature and it can be found in a considerable number of plants as well as in some fungi and bacteria. In the last years, these natural compounds have been gaining an increasing attention from the scientific community for their wide range of biological activities, mainly due to their ability to interact with diverse enzymes and receptors in living organisms. In addition, coumarin nucleus has proved to be easily synthetized and decorated, giving the possibility of designing new coumarin-based compounds and investigating their potential in the treatment of various diseases. The versatility of coumarin scaffold finds applications not only in medicinal chemistry but also in the agrochemical field as well as in the cosmetic and fragrances industry. This review is intended to be a critical overview on coumarins, comprehensive of natural sources, metabolites, biological evaluations and synthetic approaches.
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Affiliation(s)
- Francesca Annunziata
- Department of Pharmaceutical Science, University of Milan, via Mangiagalli 25, 20133 Milan, Italy; (F.A.); (C.P.)
| | - Cecilia Pinna
- Department of Pharmaceutical Science, University of Milan, via Mangiagalli 25, 20133 Milan, Italy; (F.A.); (C.P.)
| | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences, University of Milan, via Celoria 2, 20133 Milan, Italy; (S.D.); (A.P.)
| | - Lucia Tamborini
- Department of Pharmaceutical Science, University of Milan, via Mangiagalli 25, 20133 Milan, Italy; (F.A.); (C.P.)
| | - Andrea Pinto
- Department of Food, Environmental and Nutritional Sciences, University of Milan, via Celoria 2, 20133 Milan, Italy; (S.D.); (A.P.)
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Pieczykolan M, Czaban-Jóźwiak J, Malinska M, Woźniak K, Dorta R, Rybicka A, Kajetanowicz A, Grela K. The Influence of Various N-Heterocyclic Carbene Ligands on Activity of Nitro-Activated Olefin Metathesis Catalysts. Molecules 2020; 25:E2282. [PMID: 32408688 PMCID: PMC7287594 DOI: 10.3390/molecules25102282] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/06/2020] [Accepted: 05/08/2020] [Indexed: 01/13/2023] Open
Abstract
A set of nitro-activated ruthenium-based Hoveyda-Grubbs type olefin metathesis catalysts bearing sterically modified N-hetero-cyclic carbene (NHC) ligands have been obtained, characterised and studied in a set of model metathesis reactions. It was found that catalysts bearing standard SIMes and SIPr ligands (4a and 4b) gave the best results in metathesis of substrates with more accessible C-C double bonds. At the same time, catalysts bearing engineered naphthyl-substituted NHC ligands (4d-e) exhibited high activity towards formation of tetrasubstituted C-C double bonds, the reaction which was traditionally Achilles' heel of the nitro-activated Hoveyda-Grubbs catalyst.
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Affiliation(s)
- Michał Pieczykolan
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.P.); (J.C.-J.)
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (M.M.); (K.W.); (A.R.)
| | - Justyna Czaban-Jóźwiak
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.P.); (J.C.-J.)
| | - Maura Malinska
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (M.M.); (K.W.); (A.R.)
| | - Krzysztof Woźniak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (M.M.); (K.W.); (A.R.)
| | - Reto Dorta
- Department of Chemistry, School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Perth 6009, Australia;
| | - Anna Rybicka
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (M.M.); (K.W.); (A.R.)
| | - Anna Kajetanowicz
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (M.M.); (K.W.); (A.R.)
| | - Karol Grela
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.P.); (J.C.-J.)
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (M.M.); (K.W.); (A.R.)
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11
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Sunscreen-Assisted Selective Photochemical Transformations. Molecules 2020; 25:molecules25092125. [PMID: 32370013 PMCID: PMC7248769 DOI: 10.3390/molecules25092125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 04/25/2020] [Accepted: 04/29/2020] [Indexed: 12/24/2022] Open
Abstract
In this review, we describe a simple and general procedure to accomplish selective photochemical reaction sequences for two chromophores that are responsive to similar light frequencies. The essence of the method is based on the exploitation of differences in the molar absorptivity at certain wavelengths of the photosensitive groups, which is enhanced by utilizing light-absorbing auxiliary filter molecules, or “sunscreens”. Thus, the filter molecule hinders the reaction pathway of the least absorbing molecule or group, allowing for the selective reaction of the other. The method was applied to various photochemical reactions, from photolabile protecting group removal to catalytic photoinduced olefin metathesis in different wavelengths and using different sunscreen molecules. Additionally, the sunscreens were shown to be effective also when applied externally to the reaction mixture, avoiding any potential chemical interactions between sunscreen and substrates and circumventing the need to remove the light-filtering molecules from the reaction mixture, adding to the simplicity and generality of the method.
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12
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Infosys‐Preis: G. Mugesh / ICS‐Adama‐Preis: N. G. Lemcoff / Hellmann‐Preis und Haage‐Preis: T.‐C. Jagau. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Infosys Prize: G. Mugesh / ICS‐Adama Prize: N. G. Lemcoff / Hellmann Prize and Haage Prize: T.‐C. Jagau. Angew Chem Int Ed Engl 2020; 59:983. [DOI: 10.1002/anie.201915599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Eivgi O, Vaisman A, Nechmad NB, Baranov M, Lemcoff NG. Latent Ruthenium Benzylidene Phosphite Complexes for Visible-Light-Induced Olefin Metathesis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b05079] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Or Eivgi
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Anna Vaisman
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Noy B. Nechmad
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - N. Gabriel Lemcoff
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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15
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Ivry E, Nechmad NB, Baranov M, Goldberg I, Lemcoff NG. Influence of Anionic Ligand Exchange in Latent Sulfur-Chelated Ruthenium Precatalysts. Inorg Chem 2018; 57:15592-15599. [DOI: 10.1021/acs.inorgchem.8b02917] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Elisa Ivry
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Noy B. Nechmad
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Israel Goldberg
- School of Chemistry, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - N. Gabriel Lemcoff
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Beer Sheva 8410501, Israel
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16
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2017. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Eivgi O, Guidone S, Frenklah A, Kozuch S, Goldberg I, Lemcoff NG. Photoactivation of Ruthenium Phosphite Complexes for Olefin Metathesis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01637] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Or Eivgi
- Department of Chemistry, Ben Gurion University of the Negev, Beer-Sheva, Israel, 84105
| | - Stefano Guidone
- Department of Chemistry, Ben Gurion University of the Negev, Beer-Sheva, Israel, 84105
| | - Alexander Frenklah
- Department of Chemistry, Ben Gurion University of the Negev, Beer-Sheva, Israel, 84105
| | - Sebastian Kozuch
- Department of Chemistry, Ben Gurion University of the Negev, Beer-Sheva, Israel, 84105
| | - Israel Goldberg
- School of Chemistry, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - N. Gabriel Lemcoff
- Department of Chemistry, Ben Gurion University of the Negev, Beer-Sheva, Israel, 84105
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, Israel, 84105
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18
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Sutar RL, Sen S, Eivgi O, Segalovich G, Schapiro I, Reany O, Lemcoff NG. Guiding a divergent reaction by photochemical control: bichromatic selective access to levulinates and butenolides. Chem Sci 2018; 9:1368-1374. [PMID: 29675185 PMCID: PMC5885942 DOI: 10.1039/c7sc05094a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 12/18/2017] [Indexed: 01/02/2023] Open
Abstract
Allylic and acrylic substrates may be efficiently transformed by a sequential bichromatic photochemical process into derivatives of levulinates or butenolides with high selectivity when phenanthrene is used as a regulator. Thus, UV-A photoinduced cross-metathesis (CM) couples the acrylic and allylic counterparts and subsequent UV-C irradiation initiates E-Z isomerization of the carbon-carbon double bond, followed by one of two competing processes; namely, cyclization by transesterification or a 1,5-H shift and tautomerization. Quantum chemical calculations demonstrate that intermediates are strongly blue-shifted for the cyclization while red-shifted for the 1,5-H shift reaction. Hence, delaying the double bond migration by employing UV-C absorbing phenanthrene, results in a selective novel divergent all-photochemical pathway for the synthesis of fundamental structural motifs of ubiquitous natural products.
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Affiliation(s)
- Revannath L Sutar
- Department of Chemistry , Ben-Gurion University of the Negev , Beer-Sheva 84105 , Israel .
- Department of Natural Sciences , The Open University of Israel , Ra'anana , 43537 , Israel
| | - Saumik Sen
- Fritz Haber Center for Molecular Dynamics , Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem , 91904 , Israel
| | - Or Eivgi
- Department of Chemistry , Ben-Gurion University of the Negev , Beer-Sheva 84105 , Israel .
| | - Gal Segalovich
- Department of Chemistry , Ben-Gurion University of the Negev , Beer-Sheva 84105 , Israel .
| | - Igor Schapiro
- Fritz Haber Center for Molecular Dynamics , Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem , 91904 , Israel
| | - Ofer Reany
- Department of Natural Sciences , The Open University of Israel , Ra'anana , 43537 , Israel
| | - N Gabriel Lemcoff
- Department of Chemistry , Ben-Gurion University of the Negev , Beer-Sheva 84105 , Israel .
- Ilse Katz Institute for Nanoscale Science and Technology , Ben-Gurion University of the Negev , Beer-Sheva , 84105 , Israel
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