1
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Duggin M, Olivier WJ, Canty AJ, Lim LF, Cox N, Turner GF, Moggach SA, Thickett SC, Bissember AC, Fuller RO. Lawesson's Reagent: Providing a New Approach to the Forgotten 6-Thioverdazyl Radical. J Org Chem 2024; 89:9405-9419. [PMID: 38865165 DOI: 10.1021/acs.joc.4c00690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A new method for the preparation of the underrepresented 1,5-dimethyl-6-thioverdazyl radicals has been developed employing Lawesson's reagent (LR). The synthetic route involves the direct thionation of the carbonyl group of the corresponding dialkylbishydrazone followed by cyclization to give the tetrazinanthione verdazyl precursor on a gram scale. Subsequent oxidation yields the 6-thioverdazyl radical. It was determined that thionation of substrates containing electron-withdrawing groups in the ortho- or para-positions was high yielding. In contrast, for the parent phenyl group or substrates bearing weakly electron-donating substituents, thionation efficiency was significantly reduced. This could be overcome by utilizing partial in situ cyclization, which occurs during work up, to generate the tetrazinanthione directly via a one-pot synthesis. Density functional theory suggests that the LR fragment interacts with the carbonyl prior to cycloaddition and subsequent to cycloreversion, leading to the thiocarbonyl. The electronic nature of the radical is characterized with electron paramagnetic resonance as well as the first report of 6-thioverdazyl redox properties.
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Affiliation(s)
- Margot Duggin
- School of Natural Sciences─Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Wesley J Olivier
- School of Natural Sciences─Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Allan J Canty
- School of Natural Sciences─Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Li Feng Lim
- Research School of Chemistry, The Australia National University, Canberra, Australian Capital Territory 2601, Australia
| | - Nicholas Cox
- Research School of Chemistry, The Australia National University, Canberra, Australian Capital Territory 2601, Australia
| | - Gemma F Turner
- School of Molecular Sciences─Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Stephen A Moggach
- School of Molecular Sciences─Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Stuart C Thickett
- School of Natural Sciences─Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Alex C Bissember
- School of Natural Sciences─Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Rebecca O Fuller
- School of Natural Sciences─Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
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2
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Yin D, Guo Y, Xu T, Ma J. Investigation of thia-Diels-Alder Reactions by Ultrafast Transient Absorption Spectroscopy and DFT Calculations. ACS OMEGA 2024; 9:14436-14441. [PMID: 38559932 PMCID: PMC10976361 DOI: 10.1021/acsomega.4c00235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/31/2024] [Accepted: 02/23/2024] [Indexed: 04/04/2024]
Abstract
The thia-Diels-Alder reaction represents a versatile synthetic method for the preparation of six-membered sulfur-containing compounds. However, the mechanism of the thia-Diels-Alder reactions remains unclear. In this work, time-resolved spectroscopic experiments and DFT calculations demonstrate that phenacyl sulfide undergoes Norrish II cleavage to produce thioaldehyde, and ortho-hydroxy benzhydryl alcohol occurs in a dehydration reaction to generate o-QMs using diphenylphosphate as the catalyst. Then, the thia-Diels-Alder reaction takes place between thioaldehyde and o-QMs by an asynchronous concerted mechanism. The illustration of the thia-Diels-Alder reaction mechanism not only provides important support for organic synthesis and drug design but also enhances fundamental insights into reaction pathways and catalytic processes in the field of chemical synthesis.
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Affiliation(s)
- Dandan Yin
- Key
Laboratory of Synthetic and Natural Functional Molecule Chemistry
of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Yan Guo
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Tongyu Xu
- Key
Laboratory of Synthetic and Natural Functional Molecule Chemistry
of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Jiani Ma
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
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3
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Paixão DB, Soares EGO, Silva CDG, Peglow TJ, Rampon DS, Schneider PH. CS 2/KOH System-Promoted Stereoselective Synthesis of ( E)-Alkenes from Diarylalkynes and a "Hidden" Zinin-Type Reduction of Nitroarenes into Arylamines. J Org Chem 2023. [PMID: 38010206 DOI: 10.1021/acs.joc.3c01949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
In this work, we present the CS2/KOH system as a practical and efficient reductive medium for obtaining (E)-alkenes from alkynes through a highly stereoselective semireduction reaction. This cost-effective system enabled successful semireduction reactions of diverse alkynes using water as a hydrogen source, yielding moderate to excellent yields. The versatility of this protocol is further demonstrated through the synthesis of relevant compounds such as pinosylvin and resveratrol precursors, along with the notable anticancer agent DMU-212. Furthermore, during the reaction scope investigation, we serendipitously disclosed that this reductive system was also able to promote a Zinin-type reaction to reduce nitroarenes into arylamines.
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Affiliation(s)
- Douglas B Paixão
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
| | - Eduardo G O Soares
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
| | - Caren D G Silva
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
| | - Thiago J Peglow
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
| | - Daniel S Rampon
- Laboratório de Polímeros e Catálise (LAPOCA), Departamento de Química, Universidade Federal do Paraná (UFPR), P.O. Box 19061, 81531-990 Curitiba, PR, Brazil
| | - Paulo H Schneider
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
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4
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3-Methyl-1-phenyl-4-thioacetylpyrazol-5-one. MOLBANK 2023. [DOI: 10.3390/m1588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
The novel compound 3-methyl-1-phenyl-4-thioacetylpyrazol-5-one is obtained in excellent yield via a thionation of the corresponding oxygen analogue. The product is isolated in pure form using column chromatography and is characterised using 1D and 2D NMR experiments, ATR IR and HRMS spectra, and single-crystal XRD.
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5
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Mughal EU, Ashraf J, Hussein EM, Nazir Y, Alwuthaynani AS, Naeem N, Sadiq A, Alsantali RI, Ahmed SA. Design, Synthesis, and Structural Characterization of Thioflavones and Thioflavonols as Potential Tyrosinase Inhibitors: In Vitro and In Silico Studies. ACS OMEGA 2022; 7:17444-17461. [PMID: 35647459 PMCID: PMC9134403 DOI: 10.1021/acsomega.2c01841] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 04/26/2022] [Indexed: 05/04/2023]
Abstract
To find new potential tyrosinase inhibitors, a diverse range of 2-arylchromone-4-thione derivatives (2a-2p) were designed and synthesized by employing a multistep strategy, and the newly synthesized compounds, for the first time, were screened in vitro for their tyrosinase inhibitory activity. In this context, the newly synthesized compounds (2a-2p) were characterized using a combination of several spectroscopic techniques including Fourier transform infrared, UV-vis, 1H NMR, and 13C NMR spectroscopies and electron ionization-mass spectrometry. All the target compounds were potent against tyrosinase as compared to the standard inhibitor kojic acid (half-maximal inhibitory concentration (IC50) = 12.6 ± 0.6 μM). The compounds (2a-2p) produced IC50 values in the range from 1.12 ± 0.04 to 5.68 ± 0.13 μM. Among the synthesized 4-thioflavones and 4-thioflavonols, the compound 2n exhibited excellent tyrosinase inhibitory activity with the lowest IC50 of 1.12 ± 0.04 μM that could be recommended as potential lead candidates to cure tyrosinase-mediated hyperpigmentation in the future. A kinetic study of compound 2n revealed that compound 2n inhibited tyrosinase in a competitive mode. Furthermore, the nontoxic performance of the most beneficial compounds ranging from 1 to 25 g/mL was determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide test method for A375 human melanoma cells for the highly efficient target compounds (2m, 2n, 2o, and 2p). Moreover, a molecular modeling study was performed against tyrosinase enzyme (2Y9X) to check the binding interactions of the synthesized compounds (2a-2p) against the target protein. Furthermore, quantitative structure-activity relationship studies were conducted based on an antityrosinase assay. The value of the correlation coefficient (R 2) 0.9997 shows that there was a good correlation between (2a-2p) structures and selected properties. The geometry optimization of all complexes was performed by using Gaussian 09. Additionally, a drug-likeness research was used to establish the potent analogues' positive action as a new antityrosinase agent (2n, 2o, and 2p).
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Affiliation(s)
| | - Jamshaid Ashraf
- Department
of Chemistry, University of Gujrat, Gujrat 50700, Pakistan
| | - Essam M. Hussein
- Department
of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Assiut
University, Assiut 71516, Egypt
| | - Yasir Nazir
- Department
of Chemistry, Allama Iqbal Open University, Islamabad 44000 Pakistan
- Department
of Chemistry, University of Sialkot, Sialkot 51300, Pakistan
| | - Abdulaziz S. Alwuthaynani
- Department
of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Nafeesa Naeem
- Department
of Chemistry, University of Gujrat, Gujrat 50700, Pakistan
| | - Amina Sadiq
- Department
of Chemistry, Govt. College Women University, Sialkot 51300, Pakistan
| | - Reem I. Alsantali
- Department
of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Saleh A. Ahmed
- Department
of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Assiut
University, Assiut 71516, Egypt
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6
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Lin X, Pu M, Sang X, Li S, Liu X, Wu YD, Feng X. Asymmetric Catalytic (2+1) Cycloaddition of Thioketones to Synthesize Tetrasubstituted Thiiranes. Angew Chem Int Ed Engl 2022; 61:e202201151. [PMID: 35218131 DOI: 10.1002/anie.202201151] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Indexed: 12/13/2022]
Abstract
Herein, we report the first example of enantioselective (2+1) cycloaddition of thioketones with α-diazo pyrazoleamides for the direct synthesis of tetrasubstituted thiiranes. In the presence of chiral N,N'-dioxide/cobalt(ΙΙ) complexes (2-5 mol%), excellent efficiency (up to 99 % yield within 15 mins) and high stereoselectivity (up to >19 : 1 dr and 97 % ee) are available. Elaborations of thiiranes via desulfuration have also been conducted to deliver tetrasubstituted olefins. Density functional theory calculations reveal that the reaction initiates from a doublet state cobalt(ΙΙ) carbenoid, which is followed by a quartet cobalt(ΙΙ)-bound thiocarbonyl ylide pathway. This work provides a route for the selective construction of tetrasubstituted thiiranes and olefins that are otherwise difficult to access.
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Affiliation(s)
- Xiaobin Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Maoping Pu
- Shenzhen Bay Laboratory, Shenzhen, 518055, China
| | - Xinpeng Sang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Shiyang Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory, Shenzhen, 518055, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
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7
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Lin X, Pu M, Sang X, Li S, Liu X, Wu YD, Feng X. Asymmetric Catalytic (2+1) Cycloaddition of Thioketones to Synthesize Tetrasubstituted Thiiranes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaobin Lin
- Sichuan University - Wangjiang Campus: Sichuan University College of Chemistry CHINA
| | - Maoping Pu
- Shenzhen Bay Laboratory Shenzhen Bay Laboratory CHINA
| | - Xinpeng Sang
- Sichuan University - Wangjiang Campus: Sichuan University College of Chemistry CHINA
| | - Shiyang Li
- Sichuan University - Wangjiang Campus: Sichuan University College of Chemistry CHINA
| | - Xiaohua Liu
- Sichuan University - Wangjiang Campus: Sichuan University College of Chemistry CHINA
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory Shenzhen Bay Laboratory CHINA
| | - Xiaoming Feng
- Sichuan University College of Chemistry 29 Wangjiang Road, Jiuyan Bridge 610064 Chengdu CHINA
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8
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Beer H, Linke A, Bresien J, Mlostoń G, Celeda M, Villinger A, Schulz A. Synthesis of Bicyclic P,S-Heterocycles via the Addition of Thioketones to a Phosphorus-Centered Open-Shell Singlet Biradical. Inorg Chem 2022; 61:2031-2038. [PMID: 35041414 DOI: 10.1021/acs.inorgchem.1c03207] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Formal addition reactions between the open-shell singlet biradical [P(μ-NTer)]2 (1Ter) and xanthione, thioxanthione, as well as ferrocenyl naphthyl thioketone were studied in detail. Reactions were performed at room temperature and led to the formation of strained [2.1.1]-cage P,S-heterocycles (3). All addition products were isolated and fully characterized by spectroscopic methods. Furthermore, reversible cleavage of the xanthenthione-biradical addition product into the parent compounds (biradical and thioketone) could be demonstrated by 31P{1H} NMR spectroscopy. The thermodynamic stability of all cyclization products with respect to the elimination of thioketone was studied by quantum-chemical computations including solvent effects. Regarding the dissociation of addition products 3 into the fragment molecules 1Ter and ketone/thioketone, calculations prove that a significantly larger distortion energy in ketones compared with thioketones causes lower thermodynamic stability of the ketone adducts.
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Affiliation(s)
- Henrik Beer
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, D-18059 Rostock, Germany
| | - Alexander Linke
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, D-18059 Rostock, Germany.,Leibniz-Institut für Katalyse eV, Universität Rostock, Albert-Einstein-Straße 29a, D-18059 Rostock, Germany
| | - Jonas Bresien
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, D-18059 Rostock, Germany
| | - Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, University of Łódź, Tamka 12, PL-91-403 Łódź Poland
| | - Małgorzata Celeda
- Department of Organic and Applied Chemistry, University of Łódź, Tamka 12, PL-91-403 Łódź Poland
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, D-18059 Rostock, Germany.,Leibniz-Institut für Katalyse eV, Universität Rostock, Albert-Einstein-Straße 29a, D-18059 Rostock, Germany
| | - Axel Schulz
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, D-18059 Rostock, Germany.,Leibniz-Institut für Katalyse eV, Universität Rostock, Albert-Einstein-Straße 29a, D-18059 Rostock, Germany
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9
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He Y, Hou S, Hu J. Copper acetate - Iodine co-mediated thiolation of 2-arylpyridines with thiophenol. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Schulz A, Beer H, Linke A, Bresien J, Villinger A. A Cyclic Thioketone as Biradical Heterocyclopentane-1,3-diyl: Synthesis, Structure and Activation Chemistry. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00482h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of the biradical [(m-NTer)P·]2 (1) with thiophosgene, SCCl2, leads to a cyclic phospha-aza thiourea derivative (7) in very good yields. This synthetic approach represents a new possibility to...
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11
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Pietrzak M, Buczyńska J, Duus F, Waluk J, Hansen PE. Photoinduced and ground state conversions in a cyclic β-thioxoketone. RSC Adv 2021; 12:681-689. [PMID: 35425142 PMCID: PMC8697321 DOI: 10.1039/d1ra09020h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 12/30/2022] Open
Abstract
The photochemistry of a cyclic β-thioxoketone (2-methyl-1-(2-thioxycyclohexyl)propan-1-one (MTPO)) is investigated by NMR, UV, and IR experiments supported by DFT calculations. MTPO exists as a tautomeric mixture of an enol and a thiol form. Irradiation at low temperature led to a cis–trans isomerization of the thiol form resulting in a rather unusual enethiol (3). This is followed by a transfer of the isopropyl methine proton onto the carbonyl carbon resulting in yet another enethiol isomer (4). The photoconversion mechanisms without water present are discussed. Photochemical experiments at ambient temperature showed involvement of water in the excited state and resulted in another keto-form (5). The same species was also obtained when the products of the low temperature experiments were kept in the dark at ambient temperature. The photochemistry of a cyclic β-thioxoketone (2-methyl-1-(2-thioxycyclohexyl)propan-1-one (MTPO)) is investigated by NMR, UV, and IR experiments supported by DFT calculations.![]()
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Affiliation(s)
- Mariusz Pietrzak
- Institute of Physical Chemistry, Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Joanna Buczyńska
- Institute of Physical Chemistry, Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Fritz Duus
- Department of Science and Environment, Roskilde University Denmark
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland .,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University Dewajtis 5 01-815 Warsaw Poland
| | - Poul Erik Hansen
- Department of Science and Environment, Roskilde University Denmark
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12
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Das A, Ashraf MW, Banik BK. Thione Derivatives as Medicinally Important Compounds. ChemistrySelect 2021. [DOI: 10.1002/slct.202102398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Aparna Das
- Department of Mathematics and Natural Sciences College of Sciences and Human Studies Prince Mohammad Bin Fahd University Al Khobar 31952, Kingdom of Saudi Arabia
| | - Muhammad Waqar Ashraf
- Department of Mathematics and Natural Sciences College of Sciences and Human Studies Prince Mohammad Bin Fahd University Al Khobar 31952, Kingdom of Saudi Arabia
| | - Bimal Krishna Banik
- Department of Mathematics and Natural Sciences College of Sciences and Human Studies Prince Mohammad Bin Fahd University Al Khobar 31952, Kingdom of Saudi Arabia
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13
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Zhuo L, Xie S, Wang H, Zhu H. Aerobic Visible‐Light Induced Intermolecular S−N Bond Construction: Synthesis of 1,2,4‐Thiadiazoles from Thioamides under Photosensitizer‐Free Conditions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liang Zhuo
- College of Chemistry and Molecular Engineering Nanjing Tech University 211816 Nanjing China
| | - Shihua Xie
- College of Chemistry and Molecular Engineering Nanjing Tech University 211816 Nanjing China
| | - Hui Wang
- College of Chemistry and Molecular Engineering Nanjing Tech University 211816 Nanjing China
| | - Hongjun Zhu
- College of Chemistry and Molecular Engineering Nanjing Tech University 211816 Nanjing China
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14
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Wu K, Ling Y, Ding A, Jin L, Sun N, Hu B, Shen Z, Hu X. A chromatography-free and aqueous waste-free process for thioamide preparation with Lawesson's reagent. Beilstein J Org Chem 2021; 17:805-812. [PMID: 33889221 PMCID: PMC8042485 DOI: 10.3762/bjoc.17.69] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/26/2021] [Indexed: 02/05/2023] Open
Abstract
After completing the thio-substitution with Lawesson’s reagent, ethanol was found to be effective in the decomposition of the inherent stoichiometric six-membered-ring byproduct from the Lawesson’s reagent to a highly polarized diethyl thiophosphonate. The treatment significantly simplified the following chromatography purification of the desired thioamide in a small scale preparation. As scaling up the preparation of two pincer-type thioamides, we have successfully developed a convenient process with ethylene glycol to replace ethanol during the workup, including a traditional phase separation, extraction, and recrystallization. The newly developed chromatography-free procedure did not generate P-containing aqueous waste, and only organic effluents were discharged. It is believed that the optimized procedure offers the great opportunity of applying the Lawesson’s reagent for various thio-substitution reactions on a large scale.
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Affiliation(s)
- Ke Wu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - Yichen Ling
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - An Ding
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - Liqun Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - Nan Sun
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - Baoxiang Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - Zhenlu Shen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
| | - Xinquan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China
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15
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Della-Negra O, Le Cacher de Bonneville B, Chaussonnerie S, Le Paslier D, Frison G, Saaidi PL. Microbiological versus Chemical Reductive Sulfidation: An Experimental and Theoretical Study. ACS OMEGA 2021; 6:7512-7523. [PMID: 33778263 PMCID: PMC7992082 DOI: 10.1021/acsomega.0c06041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/24/2021] [Indexed: 05/16/2023]
Abstract
Microbiological reductive sulfidation (RS) has rarely been documented, although it represents an efficient strategy for thiol formation. In this work, we reported on the sulfate-respiring bacterium Desulfovibrio sp.86 that has previously demonstrated RS activity toward the pesticide chlordecone. The purpose of this study was to assess its substrate versatility using a set of 28 carbonyls, to compare with chemical RS and to rationalize the observed trends using a dual experimental and theoretical approach. The chemical RS generally proceeds in two steps (S/O exchange using a sulfur donor like P4S10, reduction of the thione intermediate). Intriguingly, chlordecone was found to be converted into chlordecthiol following the first step. Hence, we designed a protocol and applied it to the 28 substrates to assess their propensity to be directly converted into thiols with the P4S10 treatment alone. Finally, we performed density functional theory calculations on these carbonyls and their thiocarbonyl derivatives to build a set of structural, electronic, and thermodynamic parameters. The results showed that chemical and microbiological RS probably involved two distinct mechanisms. Chemically, we observed that several carbonyls, possessing electron-withdrawing groups and/or aromatic rings, were directly transformed into thiols in the presence of P4S10. The correlation obtained with the electron affinity of the thiones led us to conclude that a probable single-electron reductive transfer occurred during the first step. We also found that Desulfovibrio sp.86 transformed a variety of aldehydes and ketones, without ever detecting thiones. No significant correlation was observed with the calculated parameters, but a relationship between aldehyde RS biotransformation and bacterial growth was observed. Differences in selectivity with chemical RS open the way for further applications in organic synthesis.
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Affiliation(s)
- Oriane Della-Negra
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Brieuc Le Cacher de Bonneville
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
- Laboratoire
de Chimie Moléculaire, Ecole Polytechnique, CNRS, IP Paris, 91128 Palaiseau, France
| | - Sébastien Chaussonnerie
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Denis Le Paslier
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Gilles Frison
- Laboratoire
de Chimie Moléculaire, Ecole Polytechnique, CNRS, IP Paris, 91128 Palaiseau, France
- Sorbonne
Université, CNRS, Laboratoire de Chimie Théorique, 75005 Paris, France
| | - Pierre-Loïc Saaidi
- Génomique
Métabolique, Genoscope, Institut François Jacob, CEA,
CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
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16
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Rauch M, Luo J, Avram L, Ben-David Y, Milstein D. Mechanistic Investigations of Ruthenium Catalyzed Dehydrogenative Thioester Synthesis and Thioester Hydrogenation. ACS Catal 2021; 11:2795-2807. [PMID: 33763290 PMCID: PMC7976608 DOI: 10.1021/acscatal.1c00418] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/03/2021] [Indexed: 12/12/2022]
Abstract
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We have recently reported the previously
unknown synthesis of thioesters
by coupling thiols and alcohols (or aldehydes) with liberation of
H2, as well as the reverse hydrogenation of thioesters,
catalyzed by a well-defined ruthenium acridine-9H based pincer complex.
These reactions are highly selective and are not deactivated by the
strongly coordinating thiols. Herein, the mechanism of this reversible
transformation is investigated in detail by a combined experimental
and computational (DFT) approach. We elucidate the likely pathway
of the reactions, and demonstrate experimentally how hydrogen gas
pressure governs selectivity toward hydrogenation or dehydrogenation.
With respect to the dehydrogenative process, we discuss a competing
mechanism for ester formation, which despite being thermodynamically
preferable, it is kinetically inhibited due to the relatively high
acidity of thiol compared to alcohol and, accordingly, the substantial
difference in the relative stabilities of a ruthenium thiolate intermediate
as opposed to a ruthenium alkoxide intermediate. Accordingly, various
additional reaction pathways were considered and are discussed herein,
including the dehydrogenative coupling of alcohol to ester and the
Tischenko reaction coupling aldehyde to ester. This study should inform
future green, (de)hydrogenative catalysis with thiols and other transformations
catalyzed by related ruthenium pincer complexes.
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Affiliation(s)
- Michael Rauch
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Jie Luo
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Liat Avram
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yehoshoa Ben-David
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Milstein
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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17
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Transformation of the recalcitrant pesticide chlordecone by Desulfovibrio sp.86 with a switch from ring-opening dechlorination to reductive sulfidation activity. Sci Rep 2020; 10:13545. [PMID: 32782344 PMCID: PMC7419502 DOI: 10.1038/s41598-020-70124-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 07/21/2020] [Indexed: 01/21/2023] Open
Abstract
The insecticide chlordecone has been used in the French West Indies for decades, resulting in long term pollution, human health problems and social crisis. In addition to bacterial consortia and Citrobacter sp.86 previously described to transform chlordecone into three families of transformation products (A: hydrochlordecones, B: polychloroindenes and C: polychloroindenecarboxylic acids), another bacterium Desulfovibrio sp.86, showing the same abilities has been isolated and its genome was sequenced. Ring-opening dechlorination, leading to A, B and C families, was observed as previously described. Changing operating conditions in the presence of chlordecone gave rise to the formation of an unknown sulfur-containing transformation product instead of the aforementioned ones. Its structural elucidation enabled to conclude to a thiol derivative, which corresponds to an undocumented bacterial reductive sulfidation. Microbial experiments pointed out that the chlordecone thiol derivative was observed in anaerobiosis, and required the presence of an electron acceptor containing sulfur or hydrogen sulfide, in a confined atmosphere. It seems that this new reaction is also active on hydrochlordecones, as the 10-monohydrochlordecone A1 was transformed the same way. Moreover, the chlordecone thiol derivative called F1 was detected in several chlordecone contaminated mangrove bed sediments from Martinique Island, highlighting the environmental relevance of these results.
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18
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A fluorescent probe operating under weak acidic conditions for the visualization of HOCl in solid tumors in vivo. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9737-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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19
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Mughal EU, Sadiq A, Ashraf J, Zafar MN, Sumrra SH, Tariq R, Mumtaz A, Javid A, Khan BA, Ali A, Javed CO. Flavonols and 4-thioflavonols as potential acetylcholinesterase and butyrylcholinesterase inhibitors: Synthesis, structure-activity relationship and molecular docking studies. Bioorg Chem 2019; 91:103124. [PMID: 31319297 DOI: 10.1016/j.bioorg.2019.103124] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/04/2019] [Accepted: 07/11/2019] [Indexed: 12/11/2022]
Abstract
To explore new scaffolds for the treat of Alzheimer's disease appears to be an inspiring goal. In this context, a series of varyingly substituted flavonols and 4-thioflavonols have been designed and synthesized efficiently. All the newly synthesized compounds were characterized unambiguously by common spectroscopic techniques (IR, 1H-, 13C NMR) and mass spectrometry (EI-MS). All the derivatives (1-24) were evaluated in vitro for their inhibitory potential against cholinesterase enzymes. The results exhibited that these derivatives were potent selective inhibitors of acetylcholinesterase (AChE), except the compound 11 which was selective inhibitor of butyrylcholinesterase (BChE), with varying degree of IC50 values. Remarkably, the compounds 20 and 23 have been found the most potent almost dual inhibitors of AChE and BChE amongst the series with IC50 values even less than the standard drug. The experimental results in silico were further validated by molecular docking studies in order to find their binding modes with the active pockets of AChE and BChE enzymes.
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Affiliation(s)
| | - Amina Sadiq
- Department of Chemistry, Govt. College Women University, Sialkot 51300, Pakistan.
| | - Jamshaid Ashraf
- Department of Chemistry, University of Gujrat, Gujrat 50700, Pakistan
| | | | | | - Rubina Tariq
- Department of Chemistry, Govt. College Women University, Sialkot 51300, Pakistan
| | - Amara Mumtaz
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus 22060, Pakistan
| | - Asif Javid
- Department of Chemistry, University of Gujrat, Gujrat 50700, Pakistan
| | - Bilal Ahmad Khan
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
| | - Anser Ali
- Department of Zoology, Mirpur University of Science and Technology, Mirpur 10250, Pakistan
| | - Chaudhary Omer Javed
- Department of Chemistry, Govt. College Women University, Sialkot 51300, Pakistan
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20
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Kang Y, Zhang P, Li M, Chen Y, Xu H, Zhao J, Sun W, Yu J, Lu Y. Ligand‐Promoted Rh
III
‐Catalyzed Thiolation of Benzamides with a Broad Disulfide Scope. Angew Chem Int Ed Engl 2019; 58:9099-9103. [DOI: 10.1002/anie.201903511] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/28/2019] [Indexed: 01/12/2023]
Affiliation(s)
- Yan‐Shang Kang
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Ping Zhang
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Min‐Yan Li
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road La Jolla CA 92037 USA
| | - You‐Ke Chen
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Hua‐Jin Xu
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Jing Zhao
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Wei‐Yin Sun
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Jin‐Quan Yu
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road La Jolla CA 92037 USA
| | - Yi Lu
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
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21
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Kang Y, Zhang P, Li M, Chen Y, Xu H, Zhao J, Sun W, Yu J, Lu Y. Ligand‐Promoted Rh
III
‐Catalyzed Thiolation of Benzamides with a Broad Disulfide Scope. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903511] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yan‐Shang Kang
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Ping Zhang
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Min‐Yan Li
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road La Jolla CA 92037 USA
| | - You‐Ke Chen
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Hua‐Jin Xu
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Jing Zhao
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Wei‐Yin Sun
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
| | - Jin‐Quan Yu
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road La Jolla CA 92037 USA
| | - Yi Lu
- Coordination Chemistry InstituteState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing University Nanjing 210023 China
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