1
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Menzel S, Demadis KD, Janiak C, Hägele G. The fully deprotonated anion of 1,3,5-benzene-triphosphonic acid: 1H, 31P, and 13C{ 1H} NMR and some comments on corresponding [AX] 3 and AXX′ 2 spin systems and spectra. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1757675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Saskia Menzel
- Institut für Anorganische und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, Düsseldorf, Germany
| | - Konstantinos D. Demadis
- Department of Chemistry, University of Crete, Voutes Campus, Crystal Engineering, Growth and Design Laboratory, Heraklion, Greece
| | - Christoph Janiak
- Institut für Anorganische und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, Düsseldorf, Germany
| | - Gerhard Hägele
- Institut für Anorganische und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, Düsseldorf, Germany
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2
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Barbee D, Barron AR. Scalable synthesis of multi-substituted aryl-phosphonates: Exploring the limits of isoretical expansion and the synthesis of new triazene-based phosphonates. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2019.1673750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Derek Barbee
- Department of Materials Science and Nanoengineering, Rice University, Houston, TX, USA
| | - Andrew R. Barron
- Department of Materials Science and Nanoengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
- Energy Safety Research Institute, Swansea University, Swansea, UK
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3
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Kondo A, Satomi T, Azuma K, Takeda R, Maeda K. New layered copper 1,3,5-benzenetriphosphonates pillared with N-donor ligands: their synthesis, crystal structures, and adsorption properties. Dalton Trans 2015; 44:12717-25. [DOI: 10.1039/c5dt01137j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
New layered copper phosphonates with N-donor pillaring ligands were synthesized and their adsorption properties were investigated.
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Affiliation(s)
- Atsushi Kondo
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Koganei
- Japan
| | - Tokuya Satomi
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Koganei
- Japan
| | - Kanami Azuma
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Koganei
- Japan
| | - Rie Takeda
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Koganei
- Japan
| | - Kazuyuki Maeda
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Koganei
- Japan
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4
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Schlesinger M, Hofmann M, Rüffer T, Schaarschmidt D, Lang H, Theilacker S, Schürmann M, Jurkschat K, Mehring M. Synthesis of Dibromobenzobarrelene Derivatives and Catalytic Activity of Their Rhodium Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Maik Schlesinger
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Koordinationschemie, Strasse der Nationen 62, 09111 Chemnitz, Germany, Fax: +49‐371‐531‐21219, http://www.tu‐chemnitz.de/chemie/koord/
| | - Max Hofmann
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Koordinationschemie, Strasse der Nationen 62, 09111 Chemnitz, Germany, Fax: +49‐371‐531‐21219, http://www.tu‐chemnitz.de/chemie/koord/
| | - Tobias Rüffer
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Anorganische Chemie, Strasse der Nationen 62, 09111 Chemnitz, Germany
| | - Dieter Schaarschmidt
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Anorganische Chemie, Strasse der Nationen 62, 09111 Chemnitz, Germany
| | - Heinrich Lang
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Anorganische Chemie, Strasse der Nationen 62, 09111 Chemnitz, Germany
| | - Sergio Theilacker
- Technische Universität Dortmund, Anorganische Chemie, Otto‐Hahn‐Strasse 6, 44227 Dortmund, Germany
| | - Markus Schürmann
- Technische Universität Dortmund, Anorganische Chemie, Otto‐Hahn‐Strasse 6, 44227 Dortmund, Germany
| | - Klaus Jurkschat
- Technische Universität Dortmund, Anorganische Chemie, Otto‐Hahn‐Strasse 6, 44227 Dortmund, Germany
| | - Michael Mehring
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Koordinationschemie, Strasse der Nationen 62, 09111 Chemnitz, Germany, Fax: +49‐371‐531‐21219, http://www.tu‐chemnitz.de/chemie/koord/
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Duszczyk MM, Wutz A, Rybin V, Sattler M. The Xist RNA A-repeat comprises a novel AUCG tetraloop fold and a platform for multimerization. RNA (NEW YORK, N.Y.) 2011; 17:1973-82. [PMID: 21947263 PMCID: PMC3198591 DOI: 10.1261/rna.2747411] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 08/10/2011] [Indexed: 05/19/2023]
Abstract
X-chromosome inactivation (XCI) in female mammals depends on the noncoding RNA X inactivation specific transcript (Xist). The mechanism of chromosome-wide silencing by Xist is poorly understood. While it is established that the 5' region of Xist RNA, comprising the A-repeats and holding 7.5-8.5 copies of a conserved 26-mer sequence, is essential for Xist-mediated silencing, high-resolution structural information for the A-repeats is not available. Here, we report the three-dimensional solution structure of a 14-mer hairpin in the 5' region of a human A-repeat. This hairpin is remarkably stable and adopts a novel AUCG tetraloop fold, the integrity of which is required for silencing. We show that, contrary to previous predictions, the 3' region of single or tandem A-repeats mediates duplex formation in vitro. Significantly, mutations in this region disrupt the inter-repeat duplex formation in vitro and abrogate the silencing function of Xist A-repeats in vivo. Our data suggest that the complete A-repeat region may be stabilized by inter-repeat duplex formation and, as such, may provide a platform for multimerization and specific recognition of the AUCG tetraloops by trans-acting factors.
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Affiliation(s)
- Malgorzata M. Duszczyk
- Institute of Structural Biology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Biomolecular NMR and Center for Integrated Protein Science Munich at Department Chemie, Technische Universität München, 85747 Garching, Germany
| | - Anton Wutz
- Wellcome Trust Centre for Stem Cell Research, Cambridge CB2 1QN, United Kingdom
| | - Vladimir Rybin
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Michael Sattler
- Institute of Structural Biology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Biomolecular NMR and Center for Integrated Protein Science Munich at Department Chemie, Technische Universität München, 85747 Garching, Germany
- Corresponding author.E-mail .
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Demmer CS, Krogsgaard-Larsen N, Bunch L. Review on modern advances of chemical methods for the introduction of a phosphonic acid group. Chem Rev 2011; 111:7981-8006. [PMID: 22010799 DOI: 10.1021/cr2002646] [Citation(s) in RCA: 404] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Charles S Demmer
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
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Zeng FX, Liu WJ, Luo SW, Jiang H, Yu HQ, Guo QX. Design, Preparation, and Characterization of a Novel Hyper-Cross-Linked Polyphosphamide Polymer and Its Adsorption for Phenol. Ind Eng Chem Res 2011. [DOI: 10.1021/ie201412s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fan-Xin Zeng
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P.R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Wu-Jun, Liu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Shi-Wei, Luo
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Hong Jiang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Han-Qing Yu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Qing-Xiang Guo
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P.R. China
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Ahmad SU, Beckmann J, Duthie A. New Insights into the Formation and Reactivity of Molecular Organostannonic Acids. Chem Asian J 2010; 5:160-8. [DOI: 10.1002/asia.200900436] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Affiliation(s)
- Marek Doskocz
- a Department of Medicinal Chemistry and Microbiology, Faculty of Chemistry , Wrocław University of Technology , Wrocław, Poland
| | - Roman Gancarz
- a Department of Medicinal Chemistry and Microbiology, Faculty of Chemistry , Wrocław University of Technology , Wrocław, Poland
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10
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Scheiner S, Kar T. Effect of solvent upon CH...O hydrogen bonds with implications for protein folding. J Phys Chem B 2007; 109:3681-9. [PMID: 16851407 DOI: 10.1021/jp0446736] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The series of CH...O bonds formed between CF(n)H(4-n) (n = 0-3) and water are studied by quantum calculations under vacuum and in various solvents, including aqueous environment. The results are compared with the OH...O bond of the water dimer in the same solvents. Increasing polarity of the solvent leads in all cases to a lessening of the H-bond interaction energy, in a uniform fashion such that the CH...O bonds all remain weaker than OH...O in any solvent. These H-bond weakenings are coupled to a shortening of the inter-subunit separation. The contraction of the covalent CH bond to the bridging proton is reduced as the solvent becomes more polar, and the blue shift of its stretching vibration is likewise diminished. A process is considered that simulates protein folding by starting from a pair of noninteracting subunits in aqueous solvent and then goes to a H-bonded pair within the confines of a protein environment. This process is found to be energetically more favorable for some of the CH...O H-bonds than for the nominally stronger conventional OH...O H-bond. This finding suggests that CH...O bonds can make important energetic contributions to protein folding, on par with those made by traditional H-bonds.
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Affiliation(s)
- Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA.
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11
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Kiralj R, Ferreira MMC, Donate PM, da Silva R, Albuquerque S. Conformational study of (8alpha,8'beta)-bis(substituted phenyl)-lignano-9,9'-lactones by means of combined computational, database mining, NMR, and chemometric approaches. J Phys Chem A 2007; 111:6316-33. [PMID: 17585839 DOI: 10.1021/jp066746m] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Beta-(3,4-Methylenedioxybenzyl)-gamma-butyrolactone (MDBL) and (-)-hinokinin (HK) were obtained by partial synthesis and characterized by 1H NMR and computational methods (conformational analysis, molecular modeling, structural data mining and chemometrics). Three conformers were detected for MDBL and nine were found for HK. The energy differences are around 1 and 2 kcal mol(-1) and rotation barriers are less than 3 and 5 kcal mol(-1) for MDBL and HK conformers, respectively. The geometries of these conformers, obtained from semiempirical PM3 and density functional theory (DFT) B3LYP 6-31G** calculations agree satisfactorily with 1H NMR data (vicinal proton-proton coupling constants) and structures retrieved from the Cambridge Structural Database (torsion angles). DFT combined with some variants of the Haasnoot-de Leeuuw-Altona equations gives the best predictions for the coupling constants. The molecular conformation of MDBL, of HK, and of related systems depends not only on intramolecular interactions but also on crystal packing forces and solvent-solute interactions, in particular hydrogen bonds and polar interactions. Hydration favors more stable HK conformers, which can be important for their behavior in chemical and biological systems.
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Affiliation(s)
- Rudolf Kiralj
- Instituto de Química, Universidade Estadual de Campinas, 13083-970 Campinas, SP, Brazil
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Sasaki S, Adachi K, Yoshifuji M. Synthesis of Dihydrothiophene, Thiophene, and Their Selenium Analogues Carrying Four Phosphoryl Groups. Org Lett 2007; 9:1729-32. [PMID: 17411059 DOI: 10.1021/ol070414y] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Sodium hydrosulfide undergoes addition to two molecules of bis(diethoxyphosphoryl)acetylene followed by cyclization to give a 2,3-dihydrothiophene carrying four phosphoryl groups. Oxidation of the 2,3-dihydrothiophene with mCPBA gives the corresponding sulfoxide or sulfone depending on the ratio of the reagents, and the sulfoxide is dehydrated to afford a tetraphosphorylthiophene. The corresponding dihydroselenophene and selenophene are also synthesized in a similar manner.
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Affiliation(s)
- Shigeru Sasaki
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan.
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Reiter SA, Nogai SD, Schmidbaur H. Multifunctional Phosphorus Compounds: Molecular Structures of 1,2,4,5-Tetra(phosphinyl)-, Tetra(dimethoxyphosphoryl)-, and Tetra(dihydroxyphosphoryl)benzene. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200500107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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