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Yoneda N, Iyama H, Nagata T, Katahira M, Ishii Y, Tada K, Matsumoto K, Hagiwara R. Fluoride Ion in Alcohols: Isopropanol vs Hexafluoroisopropanol. J Phys Chem Lett 2024; 15:1677-1685. [PMID: 38315662 DOI: 10.1021/acs.jpclett.3c03619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
The utility of alcohol as a hydrogen bonding donor is considered a providential avenue for moderating the high basicity and reactivity of the fluoride ion, typically used with large cations. However, the practicality of alcohol-fluoride systems in reactions is hampered by the limited understanding of the pertinent interactions between the OH group and F-. Therefore, this study comparatively investigates the thermal, structural, and physical properties of the CsF-2-propanol and CsF-1,1,1,3,3,3-hexafluoro-2-propanol systems to explicate the effects of the fluoroalkyl group on the interaction of alcohols and F-. The two systems exhibit vastly different phase diagrams despite the similar saturated concentrations. A combination of spectroscopic analyses, alcohol activity coefficient measurements, and theoretical calculations reveal the fluorinated alcohol system harbors the stronger OH···F- interactions between the two systems. The diffusion coefficient and ionic conductivity measurements attribute the present results to disparate states of ion association in the two systems.
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Affiliation(s)
- Nozomi Yoneda
- Graduate School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Haruka Iyama
- Graduate School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Takashi Nagata
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Masato Katahira
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Yoshiki Ishii
- School of Frontier Engineering, Kitasato University, 1-15-1 Kitazato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Kohei Tada
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
| | - Kazuhiko Matsumoto
- Graduate School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Rika Hagiwara
- Graduate School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Tan B, Ren J, Chen S, Ge Z, Lu X, Yang X, Liu N. A Spiro‐Containing 7‐Hydroxy‐Carbocoumarin: Facile Two‐Step Synthesis and Enhanced Long‐Wavelength Fluorescence Properties. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100126] [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)
- Bojun Tan
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Jiatong Ren
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Shaoli Chen
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Zhongxue Ge
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Xianming Lu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Xiong Yang
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Ning Liu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
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Dyan OT, Andreev RV, Zaikin PA. Substituents effects in the Diels-Alder reaction of 1,1-difluoronaphthalen-2(1H)-ones with cyclopentadiene. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zaikin PA, Dyan OT, Elanov IR, Borodkin GI. Ionic Liquid-Assisted Grinding: An Electrophilic Fluorination Benchmark. Molecules 2021; 26:5756. [PMID: 34641300 PMCID: PMC8510021 DOI: 10.3390/molecules26195756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 11/17/2022] Open
Abstract
We demonstrated the influence of liquid additives on the rate and selectivity of mechanochemical fluorination of aromatic and 1,3-dicarbonyl compounds with F-TEDA-BF4. Substoichiometric catalytic quantities of ionic liquids speed up the reaction. We proposed an improved protocol for ionic liquids-assisted fluorination that allows easy and efficient isolation of fluorinated products by vacuum sublimation. A careful choice of additive results in high yields of fluorinated products and low E-factor for the overall process. Here, we report a benchmarking study of various ionic liquids in comparison with representative molecular solvents. A lower viscosity of ionic liquid additive is typically associated with higher yields and a higher degree of difluorination. Ionic liquids with fluorous anions (triflate and triflimide) are shown to be the most efficient catalysts for ionic liquid-assisted grinding.
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Affiliation(s)
- Pavel A. Zaikin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia; (I.R.E.); (G.I.B.)
| | - Ok Ton Dyan
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia; (I.R.E.); (G.I.B.)
- Department of Natural Sciences, Novosibirsk State University, 2 Pirogov St., 630090 Novosibirsk, Russia
| | - Innokenty R. Elanov
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia; (I.R.E.); (G.I.B.)
| | - Gennady I. Borodkin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia; (I.R.E.); (G.I.B.)
- Department of Natural Sciences, Novosibirsk State University, 2 Pirogov St., 630090 Novosibirsk, Russia
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Matikonda SS, Ivanic J, Gomez M, Hammersley G, Schnermann MJ. Core remodeling leads to long wavelength fluoro-coumarins. Chem Sci 2020; 11:7302-7307. [PMID: 34123014 PMCID: PMC8159424 DOI: 10.1039/d0sc02566f] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Low molecular weight, uncharged far-red and NIR dyes would be enabling for a range of imaging applications. Rational redesign of the coumarin scaffold leads to Fluoro-Coumarins (FCs), the lowest molecular weight dyes with emission maxima beyond 700, 800, and 900 nm. FCs display large Stokes shifts and high environmental sensitivity, with a 40-fold increase in emission intensity in hydrophobic solvents. Untargeted variants exhibit selective lipid droplet and nuclear staining in live cells. Furthermore, sulfo-lipid derivatization enables active targeting to the plasma membrane. Overall, these studies report a promising platform for the development of biocompatible, context-responsive imaging agents. Fluoro-Coumarins are a novel class of far-red and near-infrared solvent sensitive dyes of exceptionally low molecular weight.![]()
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Affiliation(s)
- Siddharth S Matikonda
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health Frederick Maryland 21702 USA
| | - Joseph Ivanic
- Advanced Biomedical Computational Science, Frederick National Laboratory for Cancer Research Frederick Maryland 21702 USA
| | - Miguel Gomez
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health Frederick Maryland 21702 USA
| | - Gabrielle Hammersley
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health Frederick Maryland 21702 USA
| | - Martin J Schnermann
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health Frederick Maryland 21702 USA
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Tonouchi Y, Matsumoto K, Nagata T, Katahira M, Hagiwara R. Fluoride Ion Interactions in Alkali-Metal Fluoride–Diol Complexes. Inorg Chem 2020; 59:6631-6639. [DOI: 10.1021/acs.inorgchem.0c00783] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yuto Tonouchi
- Graduate School of Energy Science, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kazuhiko Matsumoto
- Graduate School of Energy Science, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Takashi Nagata
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Masato Katahira
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Rika Hagiwara
- Graduate School of Energy Science, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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Jójárt R, Traj P, Kovács É, Horváth Á, Schneider G, Szécsi M, Pál A, Paragi G, Mernyák E. Synthesis, Biological Evaluation and Docking Studies of 13-Epimeric 10-fluoro- and 10-Chloroestra-1,4-dien-3-ones as Potential Aromatase Inhibitors. Molecules 2019; 24:E1783. [PMID: 31072017 PMCID: PMC6540200 DOI: 10.3390/molecules24091783] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 04/26/2019] [Accepted: 04/29/2019] [Indexed: 02/03/2023] Open
Abstract
Fluorination of 13-epimeric estrones and their 17-deoxy counterparts was performed with Selectfluor as the reagent. In acetonitrile or trifluoroacetic acid (TFA), 10β-fluoroestra-1,4-dien-3-ones were formed exclusively. Mechanistic investigations suggest that fluorinations occurred via SET in acetonitrile, but another mechanism was operative in TFA. Simultaneous application of N-chlorosuccinimide (NCS) and Selectfluor in TFA led to a 1.3:1 mixture of 10β-fluoroestra-1,4-dien-3-one and 10β-chloroestra-1,4-dien-3-one as the main products. The potential inhibitory action of the 10-fluoro- or 10-chloroestra-1,4-dien-3-one products on human aromatase was investigated via in vitro radiosubstrate incubation. The classical estrane conformation with trans ring anellations and a 13β-methyl group seems to be crucial for the inhibition of the enzyme, while test compounds bearing the 13β-methyl group exclusively displayed potent inhibitory action with submicromolar or micromolar IC50 values. Concerning molecular level explanation of biological activity or inactivity, computational simulations were performed. Docking studies reinforced that besides the well-known Met374 H-bond connection, the stereocenter in the 13 position has an important role in the binding affinity. The configuration inversion at C-13 results in weaker binding of 13α-estrone derivatives to the aromatase enzyme.
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Affiliation(s)
- Rebeka Jójárt
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
| | - Péter Traj
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
| | - Édua Kovács
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
| | - Ágnes Horváth
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
| | - Gyula Schneider
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
| | - Mihály Szécsi
- 1st Department of Medicine, University of Szeged, Korányi fasor 8⁻10, H-6720 Szeged, Hungary.
| | - Attila Pál
- Department of Medicinal Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
| | - Gábor Paragi
- MTA-SZTE Biomimetic Systems Research Group, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
- Institute of Physics, University of Pecs, Ifjúság útja 6, H-7624 Pécs, Hungary.
| | - Erzsébet Mernyák
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary.
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Chen Z, Tonouchi Y, Matsumoto K, Saimura M, Atkin R, Nagata T, Katahira M, Hagiwara R. Partially Naked Fluoride in Solvate Ionic Liquids. J Phys Chem Lett 2018; 9:6662-6667. [PMID: 30398357 DOI: 10.1021/acs.jpclett.8b03117] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Truly naked fluoride exists only in the gas phase. Fluoride can be stabilized by a complexing agent and an organic cation, resulting in anhydrous or dehydrated fluoride which is "partially naked." This partially naked fluoride enables fluorination reactions at much lower temperatures than hydrated fluorides. Here we show a simple method for preparing fluoride-based solvate ionic liquids (SILs) by mixing 1-alkyl-3-methylimidazolium (1-ethyl-3-methylimidazolium or 1-butyl-3-methylimidazolium) bromide, silver fluoride (AgF), and EG (1:1:1 in molar ratio) in dry methanol. Removal of the methanol produced anhydrous SILs, [C2C1im]F·EG and [C4C1im]F·EG. This is the first SIL reported that comprises fluoride. 1H NMR and infrared spectroscopy reveal fluoride hydrogen bonds with EG OH groups and cation aromatic H atoms but not cation tail group protons. Fluorination reactions on benzyl bromide show that [C2C1im]F·EG has high reactivity with reasonable yield under mild conditions, confirming the fluoride ion is partially naked.
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Affiliation(s)
- Zhengfei Chen
- Department of Fundamental Energy Science, Graduate School of Energy Science , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Yuto Tonouchi
- Department of Fundamental Energy Science, Graduate School of Energy Science , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Kazuhiko Matsumoto
- Department of Fundamental Energy Science, Graduate School of Energy Science , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Masayuki Saimura
- Institute of Advanced Energy , Kyoto University , Gokasho, Uji, Kyoto 611-0011 , Japan
| | - Rob Atkin
- School of Molecular Sciences , The University of Western Australia , 35 Stirling Highway , Perth , WA 6009 , Australia
| | - Takashi Nagata
- Institute of Advanced Energy , Kyoto University , Gokasho, Uji, Kyoto 611-0011 , Japan
| | - Masato Katahira
- Institute of Advanced Energy , Kyoto University , Gokasho, Uji, Kyoto 611-0011 , Japan
| | - Rika Hagiwara
- Department of Fundamental Energy Science, Graduate School of Energy Science , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
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Dyan OT, Zaikin PA, Fadeev DS, Gatilov YV, Borodkin GI. 1,1-Difluoronaphthalen-2(1H)-ones as building blocks for fluorinated tetraphenes. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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