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Khodov IA, Belov KV, Krestyaninov MA, Dyshin AA, Kiselev MG. Investigation of the Spatial Structure of Flufenamic Acid in Supercritical Carbon Dioxide Media via 2D NOESY. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16041524. [PMID: 36837153 PMCID: PMC9961892 DOI: 10.3390/ma16041524] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/17/2023] [Accepted: 02/09/2023] [Indexed: 05/13/2023]
Abstract
The search for new forms of already known drug compounds is an urgent problem of high relevance as more potent drugs with fewer side effects are needed. The trifluoromethyl group in flufenamic acid renders its chemical structure differently from other fenamates. This modification is responsible for a large number of conformational polymorphs. Therefore, flufenamic acid is a promising structural modification of well-known drug molecules. An effective approach in this field is micronization, employing "green" supercritical fluid technologies. This research raises some key questions to be answered on how to control polymorphic forms during the micronization of drug compounds. The results presented in this work demonstrate the ability of two-dimensional nuclear Overhauser effect spectroscopy to determine conformational preferences of small molecular weight drug compounds in solutions and fluids, which can be used to predict the polymorphic form during the micronization. Quantitative analysis was carried out to identify the conformational preferences of flufenamic acid molecules in dimethyl sulfoxide-d6 medium at 25 °C and 0.1 MPa, and in mixed solvent medium containing supercritical carbon dioxide at 45 °C and 9 MPa. The data presented allows predictions of the flufenamic acid conformational preferences of poorly soluble drug compounds to obtain new micronized forms.
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Conformational Screening of Arbidol Solvates: Investigation via 2D NOESY. Pharmaceutics 2023; 15:pharmaceutics15010226. [PMID: 36678855 PMCID: PMC9865235 DOI: 10.3390/pharmaceutics15010226] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/31/2022] [Accepted: 01/07/2023] [Indexed: 01/12/2023] Open
Abstract
Understanding of the nucleation process's fundamental principles in saturated solutions is an urgent task. To do this task, it is necessary to control the formation of polymorphic forms of biologically active compounds. In certain cases, a compound can exist in a single polymorphic form, but have several solvates which can appear in different crystal forms, depending on the medium and conditions of formation, and show different pharmaceutical activity. In the present paper, we report on the analysis of Arbidol conformational preferences in two solvents of different polarities-deuterated chloroform and dimethyl sulfoxide-at 25 °C, using the 2D NOESY method. The Arbidol molecule has various solvate forms depending on the molecular conformation. The method based on the nuclear Overhauser effect spectroscopy was shown to be efficient in the analysis of complex heterocyclic compounds possessing conformation-dependent pseudo-polymorphism. It is one of the types of polymorphism observed in compounds forming crystal solvates. Combined use of NMR methods and X-ray data allowed determining of conformer populations of Arbidol in CDCl3 and DMSO-d6 which were found to be 8/92% and 37/63%, respectively. The preferred conformation in solution is the same that appears in stable crystal solvates of Arbidol.
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Belov KV, Batista de Carvalho LAE, Dyshin AA, Kiselev MG, Sobornova VV, Khodov IA. Conformational Analysis of Mefenamic Acid in scCO2-DMSO by the 2D NOESY Method. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122070028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Khodov I, Belov K, Dyshin A, Krestyaninov M, Kiselev M. Pressure effect on lidocaine conformational equilibria in scCO2: A study by 2D NOESY. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Khodov IA, Belov KV, Krestyaninov MA, Kiselev MG. Conformational Equilibria of a Thiadiazole Derivative in Solvents of Different Polarities: an NMR Study. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422040148] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Guseva GB, Antina EV, Berezin MB, Ksenofontov AA, Bocharov PS, Smirnova AS, Pavelyev RS, Gilfanov IR, Pestova SV, Izmest'ev ES, Rubtsova SA, Kayumov AR, Kiselev SV, Azizova ZR, Ostolopovskaya OV, Efimov SV, Klochkov VV, Khodov IA, Nikitina LE. Conjugate of meso-carboxysubstituted-BODIPY with thioterpenoid as an effective fluorescent probe: Synthesis, structure, spectral characteristics, and molecular docking. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 268:120638. [PMID: 34840052 DOI: 10.1016/j.saa.2021.120638] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/20/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
This paper is devoted to the design of a fluorescent probe based on meso-carboxysubstituted-BODIPY with a thioterpene fragment. The functional replacement of the methoxy group in the BODIPY molecule on a thioterpene fragment was carried out in order to find out the antiplatelet and anticoagulant action mechanisms of thioterpenoids and to assess the membrane and receptor factors contributions. The molecular structure of the conjugate was confirmed via UV/vis-, NMR- and MS-spectra. It is found that the probe is a high fluorescence quantum yield (to ∼ 100%) in the blue-green region at 509-516 nm. Molecular docking of all studied molecules showed that the BODIPY with terpenoid conjugation is an excellent way to increase their affinity to platelet receptor P2Y12.
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Affiliation(s)
- Galina B Guseva
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia.
| | - Elena V Antina
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Mikhail B Berezin
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Alexander A Ksenofontov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Pavel S Bocharov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia; Ivanovo State University of Chemistry and Technology, 7, Sheremetevskiy Avenue, 153000 Ivanovo, Russia
| | - Anastassia S Smirnova
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia; Ivanovo State University of Chemistry and Technology, 7, Sheremetevskiy Avenue, 153000 Ivanovo, Russia
| | - Roman S Pavelyev
- Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
| | - Ilmir R Gilfanov
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia
| | - Svetlana V Pestova
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 48, 167000 Syktyvkar, Russia
| | - Evgeny S Izmest'ev
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 48, 167000 Syktyvkar, Russia
| | - Svetlana A Rubtsova
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 48, 167000 Syktyvkar, Russia
| | - Airat R Kayumov
- Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
| | - Sergei V Kiselev
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia
| | - Zulfiya R Azizova
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia
| | | | - Sergey V Efimov
- Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
| | | | - Ilya A Khodov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Liliya E Nikitina
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia; Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
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Belov KV, Dyshin AA, Kiselev MG, Krestyaninov MA, Sobornova VV, Khodov IA. Determination of the Spatial Structure of Lidocaine in SC-CO2 by the 2D NOESY Method. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793121080145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Mumuni MA, Amarachi CS, Victor AC, Romanus OC, Ogbonna J, Aminu N, James OY, Muhammed A, C. Franklin K, Díaz DD. A novel formulation design based on hetero-templated solid lipid microparticles to improve the solubility of anti-inflammatory piroxicam for oral administration. NEW J CHEM 2022. [DOI: 10.1039/d1nj05281k] [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 aim of the work was to formulate piroxicam-loaded solid lipid microparticles (SLMs) using natural biodegradable lipids and to evaluate the in vitro and in vivo properties of the formulations.
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Affiliation(s)
- Momoh A. Mumuni
- Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Nigeria
| | - Chime S. Amarachi
- Department of Pharmaceutical Technology and Industrial Pharmacy, University of Nigeria, Nsukka 410001, Nigeria
| | - Anih C. Victor
- Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Nigeria
| | - Omeh C. Romanus
- Department of Pharmaceutics and Pharmaceutical Microbiology, Faculty of Pharmaceutical Sciences, Usmanu Danfodiyo University Sokoto, Sokoto State, Nigeria
| | - Josephat Ogbonna
- Department of Pharmaceutical Technology and Industrial Pharmacy, University of Nigeria, Nsukka 410001, Nigeria
| | - Nafiu Aminu
- Department of Pharmaceutics and Pharmaceutical Microbiology, Faculty of Pharmaceutical Sciences, Usmanu Danfodiyo University Sokoto, Sokoto State, Nigeria
| | - Oyeniyi Y. James
- Department of Pharmaceutics and Pharmaceutical Microbiology, Faculty of Pharmaceutical Sciences, Usmanu Danfodiyo University Sokoto, Sokoto State, Nigeria
| | - Achor Muhammed
- Department of Pharmaceutics and Pharmaceutical Microbiology, Faculty of Pharmaceutical Sciences, Usmanu Danfodiyo University Sokoto, Sokoto State, Nigeria
| | | | - David Díaz Díaz
- Instituto Universitario de Bio-Orgánica Antonio González, Avda. Astrofísico Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
- Departamento de Química Orgánica, Avda. Astrofísico Francisco Sánchez 3, 38206, La Laguna, Tenerife, Spain
- Institute of Organic Chemistry, University of Regensburg, Universitätstrasse. 31, 93040, Regensburg, Germany
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High temperature polymorphic conversion of carbamazepine in supercritical CO2: A way to obtain pure polymorph I. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114630] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Exposing Hidden Conformations of Carbamazepine Appearing Due to Interaction With the Solid Phase by 2D 1H- 15N HMBC NMR Spectroscopy. J Pharm Sci 2021; 110:1533-1539. [PMID: 33421434 DOI: 10.1016/j.xphs.2021.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 12/22/2020] [Accepted: 01/03/2021] [Indexed: 11/20/2022]
Abstract
Two-dimensional 1H-15N HMBC NMR spectra of the well-known anticonvulsant carbamazepine dissolved in different organic solvents, recorded on an NMR spectrometer prove the existence of hidden conformers in saturated solutions. Obtained conformer distribution arises due to the presence of the solid phase in saturated solution. A weak influence of ring currents was revealed for different molecular conformations of carbamazepine dissolved in a saturated solution, which provides a simple approach to discovering hidden conformations. Hidden conformers were found in three different solvents: dimethyl sulfoxide, chloroform, and dichloromethane.
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12
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Khodov I, Dyshin A, Efimov S, Ivlev D, Kiselev M. High-pressure NMR spectroscopy in studies of the conformational composition of small molecules in supercritical carbon dioxide. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113113] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Spatial structure, thermodynamics and kinetics of formation of hydrazones derived from pyridoxal 5′-phosphate and 2-furoic, thiophene-2-carboxylic hydrazides in solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.125] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Budkov Y, Kolesnikov A, Ivlev D, Kalikin N, Kiselev M. Possibility of pressure crossover prediction by classical DFT for sparingly dissolved compounds in scCO2. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Paprocka R, Wiese-Szadkowska M, Helmin-Basa A, Mazur L, Kutkowska J, Michałkiewicz J, Modzelewska-Banachiewicz B, Pazderski L. Synthesis and evaluation of new amidrazone-derived hydrazides as a potential anti-inflammatory agents. MONATSHEFTE FUR CHEMIE 2018; 149:1493-1500. [PMID: 30100633 PMCID: PMC6060958 DOI: 10.1007/s00706-018-2197-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 04/03/2018] [Indexed: 11/15/2022]
Abstract
ABSTRACT The series of new hydrazide derivatives were synthesized in reactions of N3-substituted amidrazones with cyclic anhydrides as potential anti-inflammatory and antibacterial agents. The compounds were characterized by 1H-13C two-dimensional NMR techniques, which revealed the presence of two tautomeric forms in DMSO-d6 solutions, while the molecular structure of one species was confirmed by single-crystal X-ray diffraction. The anti-inflammatory effects of hydrazides on peripheral blood mononuclear cells were experimentally evaluated. Three compounds showed antiproliferative activity comparable to ibuprofen. One derivative demonstrated strong reduction of lymphocyte proliferation stimulated by anti-CD3 antibody (by 90%) and PHA, as well as low cell toxicity. The obtained compounds exhibited relatively weak antibacterial activity; they were more effective against Gram-positive bacterial strains. GRAPHICAL ABSTRACT
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Affiliation(s)
- Renata Paprocka
- Department of Organic Chemistry, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland
| | | | - Anna Helmin-Basa
- Department of Immunology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland
| | - Liliana Mazur
- Faculty of Chemistry, Maria Curie-Skłodowska University, Lublin, Poland
| | - Jolanta Kutkowska
- Department of Genetics and Microbiology, Maria Curie-Sklodowska University, Lublin, Poland
| | - Jacek Michałkiewicz
- Department of Immunology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland
- Department of Clinical Microbiology and Immunology, The Children’s Memorial Health Institute, Warsaw, Poland
| | | | - Leszek Pazderski
- Department of Analytical Chemistry and Applied Spectroscopy, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Toruń, Poland
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Manin AN, Voronin AP, Drozd KV, Churakov AV, Perlovich GL. Pharmaceutical salts of emoxypine with dicarboxylic acids. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:797-806. [PMID: 29973419 DOI: 10.1107/s2053229618007386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 05/16/2018] [Indexed: 02/01/2023]
Abstract
New salt forms of the antioxidant drug emoxypine (EMX, 2-ethyl-6-methylpyridin-3-ol) with pharmaceutically acceptable maleic (Mlt), malonic (Mln) and adipic (Adp) acids were obtained {emoxypinium maleate, C8H12NO+·C4H3O4-, [EMX+Mlt], emoxypinium malonate, C8H12NO+·C3H3O4-, [EMX+Mln], and emoxypinium adipate, C8H12NO+·C6H9O4-, [EMX+Adp]} and their crystal structures determined. The molecular packing in the three EMX salts was studied by means of solid-state density functional theory (DFT), followed by QTAIMC (quantum theory of atoms in molecules and crystals) analysis. It was found that the major contribution to the packing energy comes from pyridine-carboxylate and hydroxy-carboxylate heterosynthons forming infinite one-dimensional ribbons, with [EMX+Adp] additionally stabilized by hydrogen-bonded C(9) chains of Adp- ions. The melting processes of the [EMX+Mlt] (1:1), [EMX+Mln] (1:1) and [EMX+Adp] (1:1) salts were studied and the fusion enthalpy was found to increase with the increase of the calculated lattice energy. The dissolution process of the EMX salts in buffer (pH 7.4) was also studied. It was found that the formation of binary crystals of EMX with dicarboxylic acids increases the EMX solubility by more than 30 times compared to its pure form.
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Affiliation(s)
- Alex N Manin
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya St., Ivanovo 153045, Russian Federation
| | - Alexander P Voronin
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya St., Ivanovo 153045, Russian Federation
| | - Ksenia V Drozd
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya St., Ivanovo 153045, Russian Federation
| | - Andrei V Churakov
- Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Prosp., Moscow 119991, Russian Federation
| | - German L Perlovich
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya St., Ivanovo 153045, Russian Federation
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Di Pietro ME, Celebre G, Aroulanda C, Merlet D, De Luca G. Assessing the stable conformations of ibuprofen in solution by means of Residual Dipolar Couplings. Eur J Pharm Sci 2017; 106:113-121. [DOI: 10.1016/j.ejps.2017.05.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 04/21/2017] [Accepted: 05/13/2017] [Indexed: 11/28/2022]
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Theoretical and experimental study of imine-enamine tautomerism of condensation products of propanal with 4-aminobenzoic acid in ethanol. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1701-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Rakhmatullin IZ, Galiullina LF, Balandina AA, Garipov MR, Strelnik AD, Galiullina AS, Shtyrlin YG, Klochkov VV. Stereodynamics of some pyridoxine derivatives. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:304-311. [PMID: 27663994 DOI: 10.1002/mrc.4528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/13/2016] [Accepted: 09/15/2016] [Indexed: 06/06/2023]
Abstract
The conformational properties of three pyridoxine derivatives were studied by 1 H dynamic NMR spectroscopy. Conformational exchange caused by a rotation of 2-nytrophenyl group around one single C-C bond, of 2,4-dinitrophenyl substituent around two single C-O bonds, and twist-twist transformations of the seven-membered ketal cycle was observed by NMR experiments at low temperatures. Meanwhile, the conformational exchange of the acetal ring remains fast in the NMR timescale even at 198 K. The energy barriers for all observed conformational exchange processes were determined by the lineshape analysis of dynamic NMR spectra. The activation barriers of the 2-nitrophenyl group rotation were almost the same for all studied compounds, about 40-41 kJ/mol. The energy barriers of the conformational exchange processes of the 2,4-nitrophenyl group and the ketal cycle increased significantly up to 10 kJ/mol in comparison with previously studied compounds with similar structure. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- I Z Rakhmatullin
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - L F Galiullina
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - A A Balandina
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - M R Garipov
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - A D Strelnik
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - A S Galiullina
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - Y G Shtyrlin
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
| | - V V Klochkov
- Kazan (Volga Region) Federal University, 18 Kremlevskaya St., Kazan, 420008, Russia
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Khodov IA, Maltceva OV, Klochkov VV, Koifman OI, Mamardashvili NZ. N-Confused porphyrins: complexation and 1H NMR studies. NEW J CHEM 2017. [DOI: 10.1039/c7nj01814b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The complexation of 2-aza-21-carba-tetraphenylporphyrin and 2-aza-2-methyl-5,10,15,20-tetraphenyl-21-carbaporphyrin with nickel and zinc acetates in organic solvents has been investigated by UV-Vis spectroscopy and 1H NMR.
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Affiliation(s)
- Ilya A. Khodov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences
- Ivanovo
- Russia
- Kazan Federal University
- Kazan
| | - Olga V. Maltceva
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences
- Ivanovo
- Russia
| | | | - Oscar I. Koifman
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences
- Ivanovo
- Russia
- Research Institute of Macroheterocycles
- Ivanovo State University of Chemistry and Technology
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Rakhmatullin I, Galiullina L, Garipov M, Strel’nik A, Shtyrlin Y, Klochkov V. 1H NMR Characterization of Two New Pyridoxine Derivatives. BIONANOSCIENCE 2016. [DOI: 10.1007/s12668-016-0214-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Corrigendum to “The importance of suppressing spin diffusion effects in the accurate determination of the spatial structure of a flexible molecule by nuclear Overhauser effect spectroscopy” [J. Mol. Struct. 1106 (2016) 373–381]. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.02.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Khodov IA, Kiselev MG, Efimov SV, Klochkov VV. Comment on "Conformational analysis of small organic molecules using NOE and RDC data: A discussion of strychnine and α-methylene-γ-butyrolactone". JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2016; 266:67-68. [PMID: 26924224 DOI: 10.1016/j.jmr.2016.02.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 02/12/2016] [Indexed: 06/05/2023]
Affiliation(s)
- I A Khodov
- Laboratory of NMR-spectroscopy and Numerical Investigation Methods of Liquids, G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Akademicheskaya St. 1, Ivanovo 153045, Russian Federation; Institute of Physics, Kazan Federal University, Kremlevskaya St. 18, Kazan 420008, Russian Federation.
| | - M G Kiselev
- Laboratory of NMR-spectroscopy and Numerical Investigation Methods of Liquids, G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Akademicheskaya St. 1, Ivanovo 153045, Russian Federation
| | - S V Efimov
- Institute of Physics, Kazan Federal University, Kremlevskaya St. 18, Kazan 420008, Russian Federation
| | - V V Klochkov
- Institute of Physics, Kazan Federal University, Kremlevskaya St. 18, Kazan 420008, Russian Federation
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Khodov I, Efimov S, Klochkov V, Batista de Carvalho L, Kiselev M. The importance of suppressing spin diffusion effects in the accurate determination of the spatial structure of a flexible molecule by nuclear Overhauser effect spectroscopy. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.055] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Efimov S, Khodov I, Ratkova E, Kiselev M, Berger S, Klochkov V. Detailed NOESY/T-ROESY analysis as an effective method for eliminating spin diffusion from 2D NOE spectra of small flexible molecules. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.09.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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