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Mondal S, Midya SP, Mondal S, Das S, Ghosh P. Merging Photocatalytic Doubly-Decarboxylative C sp 2 -C sp 2 Cross-Coupling for Stereo-Selective (E)-α,β-Unsaturated Ketones Synthesis. Chemistry 2024; 30:e202303337. [PMID: 37987541 DOI: 10.1002/chem.202303337] [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: 10/11/2023] [Revised: 11/10/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
A photocatalytic domain of doubly decarboxylative Csp 2 -Csp 2 cross coupling reaction is disclosed. Merging iridium and palladium photocatalysis manifested carbon-carbon bonds in a tandem dual-radical pathway. Present catalytic platform efficiently cross-coupled α, β-unsaturated acids and α-keto acids to afford a variety of α, β-unsaturated ketones with excellent (E)-selectivity and functional group tolerance. Mechanistically, photocatalyst implicated through reductive quenching cycle whereas cross coupling proceeded over one electron oxidative pallado-cycle.
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Affiliation(s)
- Subal Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Siba P Midya
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Soumya Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Suman Das
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Pradyut Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
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2
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Non-adiabatic Dynamics Mechanism in Excited State of Novel UV Protective Sunscreen in Rice: Conical Intersection Promotes Internal Conversion. J CLUST SCI 2021. [DOI: 10.1007/s10876-020-01819-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Rodríguez RB, Zapata RL, Salum ML, Erra-Balsells R. Understanding the role played by protic ionic liquids (PILs) and the substituent effect for enhancing the generation of Z-cinnamic acid derivatives†. Photochem Photobiol Sci 2020; 19:819-830. [PMID: 33856671 DOI: 10.1039/d0pp00072h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/30/2020] [Indexed: 11/21/2022]
Abstract
Photoisomerization of a series of substituted E-cinnamic acids in MeCN in their acid forms and as their corresponding protic ionic liquids (PILs) with light of 300 nm is studied. The nature, strength, number, and position effects of substituents on the photochemical behavior of E-cinnamic derivatives are investigated. The photosensitization of the reaction in the presence of Michler's ketone is also studied at 366 nm and it demonstrates that the triplet-excited state is involved in the reaction. As the presence of n-butylamine needed to form the PILs significantly increases the photoproduct yields in all cases, the role of the PILs is also discussed. Thus, understanding of these fundamental aspects has allowed us to establish an excellent and practical synthetic protocol for successfully synthesizing Z-cinnamic acids.
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Affiliation(s)
- Rocío B Rodríguez
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
- Design and Chemistry of Macromolecules Group, Institute of Technology in Polymers and Nanotechnology (ITPN), UBA-CONICET, FADU, University of Buenos Aires, Intendente Güiraldes 2160, Pabellón III, subsuelo, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina
| | - Ramiro L Zapata
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
| | - María L Salum
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina.
- CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR). Facultad de Ciencias Exactas y Naturales Pabellón II, 3er P. Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina.
| | - Rosa Erra-Balsells
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
- CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR). Facultad de Ciencias Exactas y Naturales Pabellón II, 3er P. Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
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Gackowska A, Studziński W, Kudlek E, Dudziak M, Gaca J. Estimation of physicochemical properties of 2-ethylhexyl-4-methoxycinnamate (EHMC) degradation products and their toxicological evaluation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:16037-16049. [PMID: 29594898 PMCID: PMC5984635 DOI: 10.1007/s11356-018-1796-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/19/2018] [Indexed: 05/16/2023]
Abstract
The organic UV filters, commonly used in personal protection products, are of concern because of their potential risk to aquatic ecosystems and living organisms. One of UV filters is ethylhexyl-4-methoxycinnamate (EHMC) acid. Studies have shown that, in the presence of oxidizing and chlorinating factors, EHMC forms a series of products with different properties than the substrate. In this study, the toxicities of EHMC and its transformation/degradation products formed under the influence of NaOCl/UV and H2O2/UV systems in the water medium were tested using Microtox® bioassay and by observation of mortality of juvenile crustaceans Daphnia magna and Artemia Salina. We have observed that oxidation and chlorination products of EHMC show significantly higher toxicity than EHMC alone. The toxicity of chemicals is related to their physicochemical characteristic such as lipophilicity and substituent groups. With the increase in lipophilicity of products, expressed as log KOW, the toxicity (EC50) increases. On the basis of physicochemical properties such as vapour pressure (VP), solubility (S), octanol-water partition coefficient (KOW), bioconcentration factor (BCF) and half-lives, the overall persistence (POV) and long-range transport potential (LRTP) of all the products and EHMC were calculated. It was shown that the most persistent and traveling on the long distances in environment are methoxyphenol chloroderivatives, then methoxybenzene chloroderivatives, EHMC chloroderivatives, methoxybenzaldehyde chloroderivatives and methoxycinnamate acid chloroderivatives. These compounds are also characterised by high toxicity.
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Affiliation(s)
- Alicja Gackowska
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326, Bydgoszcz, Poland.
| | - Waldemar Studziński
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326, Bydgoszcz, Poland
| | - Edyta Kudlek
- Institute of Water and Wastewater Engineering, Silesian University of Technology, Konarskiego 18, 44-100, Gliwice, Poland
| | - Mariusz Dudziak
- Institute of Water and Wastewater Engineering, Silesian University of Technology, Konarskiego 18, 44-100, Gliwice, Poland
| | - Jerzy Gaca
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326, Bydgoszcz, Poland
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Matsumoto S, Kumasaka R, Yagi M, Kikuchi A. Triplet–triplet energy transfer between UV absorbers in solutions at room temperature. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Karaköse H, Jaiswal R, Deshpande S, Kuhnert N. Investigation of the photochemical changes of chlorogenic acids induced by ultraviolet light in model systems and in agricultural practice with Stevia rebaudiana cultivation as an example. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:3338-3347. [PMID: 25699645 DOI: 10.1021/acs.jafc.5b00838] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mono- and diacyl chlorogenic acids undergo photochemical trans-cis isomerization under ultraviolet (UV) irradiation. The photochemical equilibrium composition was established for eight selected derivatives. In contrast to all other dicaffeoylquinic acid derivatives, cynarin (1,3-dicaffeoylquinic acid) undergoes a [2 + 2] photochemical cycloaddition reaction, constituting a first example of Schmidt's law in a natural product family. The relevance of photochemical isomerization in agricultural practice was investigated using 120 samples of Stevia rebaudiana leave samples grown under defined cultivation conditions. Ratios of cis to trans chlorogenic acids were determined in leaf samples and correlated with climatic and harvesting conditions. The data indicate a clear correlation between the formation of cis-caffeoyl derivatives and sunshine hours prior to harvesting and illustrate the relevance of UV exposure to plant material affecting its phytochemical composition.
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Affiliation(s)
- Hande Karaköse
- Department of Life Sciences and Chemistry, Jacobs University Bremen, 28759 Bremen, Germany
| | - Rakesh Jaiswal
- Department of Life Sciences and Chemistry, Jacobs University Bremen, 28759 Bremen, Germany
| | - Sagar Deshpande
- Department of Life Sciences and Chemistry, Jacobs University Bremen, 28759 Bremen, Germany
| | - Nikolai Kuhnert
- Department of Life Sciences and Chemistry, Jacobs University Bremen, 28759 Bremen, Germany
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Tsuchiya T, Kikuchi A, Oguchi-Fujiyama N, Miyazawa K, Yagi M. Photoexcited triplet states of UV-B absorbers: ethylhexyl triazone and diethylhexylbutamido triazone. Photochem Photobiol Sci 2015; 14:807-14. [DOI: 10.1039/c4pp00373j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The lowest excited triplet state of a UV-B absorber with extremely high molecular extinction, ethylhexyl triazone, can be assigned to a locally excited3ππ* state within a chromophore,p-(N-methylamino)benzoic acid.
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Affiliation(s)
- Takumi Tsuchiya
- Department of Chemistry
- Graduate School of Engineering
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Azusa Kikuchi
- Department of Chemistry
- Graduate School of Engineering
- Yokohama National University
- Yokohama 240-8501
- Japan
| | | | | | - Mikio Yagi
- Department of Chemistry
- Graduate School of Engineering
- Yokohama National University
- Yokohama 240-8501
- Japan
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Experimental and theoretical studies on the photodegradation of 2-ethylhexyl 4-methoxycinnamate in the presence of reactive oxygen and chlorine species. OPEN CHEM 2014. [DOI: 10.2478/s11532-014-0522-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract2-Ethylhexyl 4-methoxycinnamate (EHMC) is one of the most commonly used sunscreen ingredient. In this study we investigated photodegradation of EHMC in the presence of such common oxidizing and chlorinating systems as H2O2, H2O2/HCl, H2O2/UV, and H2O2/HCl/UV. Reaction products were detected by gas chromatography with a mass spectrometric detector (GC-MS). As a result of experimental studies chloro-substituted 4-methoxycinnamic acid (4-MCA), 4-methoxybenzaldehyde (4-MBA) and 4-methoxyphenol (4-MP) were identified. Experimental studies were enriched with DFT and MP2 calculations. We found that reactions of 4-MCA, 4-MBA and 4-MP with Cl2 and HOCl were in all cases thermodynamically favorable. However, reactivity indices provide a better explanation of the formation of particular chloroorganic compounds. Generally, those isomeric forms of mono- and dichlorinated compounds which exhibits the highest hardness were identified. Nucleophilicity of the chloroorganic compounds precursors were examined by means of the Fukui function.
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Kikuchi A, Oguchi-Fujiyama N, Miyazawa K, Yagi M. Triplet-Triplet Energy Transfer from a UV-A Absorber Butylmethoxydibenzoylmethane to UV-B Absorbers. Photochem Photobiol 2014; 90:511-6. [DOI: 10.1111/php.12222] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 12/04/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Azusa Kikuchi
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Hodogaya-ku Yokohama Japan
| | | | | | - Mikio Yagi
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Hodogaya-ku Yokohama Japan
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Kikuchi A, Shibata K, Kumasaka R, Yagi M. Optical and Time-Resolved Electron Paramagnetic Resonance Studies of the Excited States of a UV-B Absorber (4-Methylbenzylidene)camphor. J Phys Chem A 2013; 117:1413-9. [DOI: 10.1021/jp3071772] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Azusa Kikuchi
- Department of Chemistry, Graduate
School of Engineering, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Kenji Shibata
- Department of Chemistry, Graduate
School of Engineering, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Ryo Kumasaka
- Department of Chemistry, Graduate
School of Engineering, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Mikio Yagi
- Department of Chemistry, Graduate
School of Engineering, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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11
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Kikuchi A, Shibata K, Kumasaka R, Yagi M. Excited states of menthyl anthranilate: a UV-A absorber. Photochem Photobiol Sci 2013; 12:246-53. [DOI: 10.1039/c2pp25190f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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12
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Kikuchi A, Hata Y, Kumasaka R, Nanbu Y, Yagi M. Photoexcited Singlet and Triplet States of a UV Absorber Ethylhexyl Methoxycrylene. Photochem Photobiol 2012; 89:523-8. [DOI: 10.1111/php.12017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 11/01/2012] [Indexed: 01/04/2023]
Affiliation(s)
- Azusa Kikuchi
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Yokohama; Japan
| | - Yuki Hata
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Yokohama; Japan
| | - Ryo Kumasaka
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Yokohama; Japan
| | - Yuichi Nanbu
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Yokohama; Japan
| | - Mikio Yagi
- Department of Chemistry; Graduate School of Engineering; Yokohama National University; Yokohama; Japan
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Oguchi-Fujiyama N, Miyazawa K, Kikuchi A, Yagi M. Photophysical properties of dioctyl 4-methoxybenzylidenemalonate: UV-B absorber. Photochem Photobiol Sci 2012; 11:1528-35. [DOI: 10.1039/c2pp25101a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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