1
|
Feride Akman, Kazachenko AS, Issaoui N. DFT Calculations of Some Important Radicals Used in the Nitroxide-Mediated Polymerization and Their HOMO‒LUMO, Natural Bond Orbital, and Molecular Electrostatic Potential Comparative Analysis. POLYMER SCIENCE SERIES B 2022. [DOI: 10.1134/s156009042270035x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
2
|
Feride Akman, Kazachenko AS, Issaoui N. DFT Calculations of Some Important Radicals Used in the Nitroxide-Mediated Polymerization and Their HOMO‒LUMO, Natural Bond Orbital, and Molecular Electrostatic Potential Comparative Analysis. POLYMER SCIENCE SERIES B 2022. [DOI: doi.org/10.1134/s156009042270035x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
3
|
Kazachenko AS, Akman F, Vasilieva NY, Issaoui N, Malyar YN, Kondrasenko AA, Borovkova VS, Miroshnikova AV, Kazachenko AS, Al-Dossary O, Wojcik MJ, Berezhnaya YD, Elsuf’ev EV. Catalytic Sulfation of Betulin with Sulfamic Acid: Experiment and DFT Calculation. Int J Mol Sci 2022. [DOI: doi.org/10.3390/ijms23031602] [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] Open
Abstract
Betulin is an important triterpenoid substance isolated from birch bark, which, together with its sulfates, exhibits important bioactive properties. We report on a newly developed method of betulin sulfation with sulfamic acid in pyridine in the presence of an Amberlyst®15 solid acid catalyst. It has been shown that this catalyst remains stable when being repeatedly (up to four cycles) used and ensures obtaining of sulfated betulin with a sulfur content of ~10%. The introduction of the sulfate group into the betulin molecule has been proven by Fourier-transform infrared, ultraviolet-visible, and nuclear magnetic resonance spectroscopy. The Fourier-transform infrared (FTIR) spectra contain absorption bands at 1249 and 835–841 cm−1; in the UV spectra, the peak intensity decreases; and, in the nuclear magnetic resonance (NMR) spectra, of betulin disulfate, carbons С3 and С28 are completely shifted to the weak-field region (to 88.21 and 67.32 ppm, respectively) with respect to betulin. Using the potentiometric titration method, the product of acidity constants K1 and K2 of a solution of the betulin disulfate H+ form has been found to be 3.86 × 10–6 ± 0.004. It has been demonstrated by the thermal analysis that betulin and the betulin disulfate sodium salt are stable at temperatures of up to 240 and 220 °C, respectively. The density functional theory method has been used to obtain data on the most stable conformations, molecular electrostatic potential, frontier molecular orbitals, and mulliken atomic charges of betulin and betulin disulfate and to calculate the spectral characteristics of initial and sulfated betulin, which agree well with the experimental data.
Collapse
|
4
|
Kazachenko AS, Akman F, Vasilieva NY, Issaoui N, Malyar YN, Kondrasenko AA, Borovkova VS, Miroshnikova AV, Kazachenko AS, Al-Dossary O, Wojcik MJ, Berezhnaya YD, Elsuf’ev EV. Catalytic Sulfation of Betulin with Sulfamic Acid: Experiment and DFT Calculation. Int J Mol Sci 2022; 23:1602. [PMID: 35163526 PMCID: PMC8836291 DOI: 10.3390/ijms23031602] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/25/2022] [Accepted: 01/25/2022] [Indexed: 01/18/2023] Open
Abstract
Betulin is an important triterpenoid substance isolated from birch bark, which, together with its sulfates, exhibits important bioactive properties. We report on a newly developed method of betulin sulfation with sulfamic acid in pyridine in the presence of an Amberlyst®15 solid acid catalyst. It has been shown that this catalyst remains stable when being repeatedly (up to four cycles) used and ensures obtaining of sulfated betulin with a sulfur content of ~10%. The introduction of the sulfate group into the betulin molecule has been proven by Fourier-transform infrared, ultraviolet-visible, and nuclear magnetic resonance spectroscopy. The Fourier-transform infrared (FTIR) spectra contain absorption bands at 1249 and 835-841 cm-1; in the UV spectra, the peak intensity decreases; and, in the nuclear magnetic resonance (NMR) spectra, of betulin disulfate, carbons С3 and С28 are completely shifted to the weak-field region (to 88.21 and 67.32 ppm, respectively) with respect to betulin. Using the potentiometric titration method, the product of acidity constants K1 and K2 of a solution of the betulin disulfate H+ form has been found to be 3.86 × 10-6 ± 0.004. It has been demonstrated by the thermal analysis that betulin and the betulin disulfate sodium salt are stable at temperatures of up to 240 and 220 °C, respectively. The density functional theory method has been used to obtain data on the most stable conformations, molecular electrostatic potential, frontier molecular orbitals, and mulliken atomic charges of betulin and betulin disulfate and to calculate the spectral characteristics of initial and sulfated betulin, which agree well with the experimental data.
Collapse
Affiliation(s)
- Aleksandr S. Kazachenko
- Department of Organic and Analytical Chemistry, Institute of Nonferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia; (N.Y.V.); (Y.N.M.); (V.S.B.); (A.V.M.); (A.S.K.)
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| | - Feride Akman
- Vocational School of Food, Agriculture and Livestock, University of Bingöl, Bingöl 12000, Turkey;
| | - Natalya Yu. Vasilieva
- Department of Organic and Analytical Chemistry, Institute of Nonferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia; (N.Y.V.); (Y.N.M.); (V.S.B.); (A.V.M.); (A.S.K.)
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| | - Noureddine Issaoui
- Laboratory of Quantum and Statistical Physics (LR18ES18), Faculty of Sciences, University of Monastir, Monastir 5079, Tunisia;
| | - Yuriy N. Malyar
- Department of Organic and Analytical Chemistry, Institute of Nonferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia; (N.Y.V.); (Y.N.M.); (V.S.B.); (A.V.M.); (A.S.K.)
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| | - Aleksandr A. Kondrasenko
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| | - Valentina S. Borovkova
- Department of Organic and Analytical Chemistry, Institute of Nonferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia; (N.Y.V.); (Y.N.M.); (V.S.B.); (A.V.M.); (A.S.K.)
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| | - Angelina V. Miroshnikova
- Department of Organic and Analytical Chemistry, Institute of Nonferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia; (N.Y.V.); (Y.N.M.); (V.S.B.); (A.V.M.); (A.S.K.)
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| | - Anna S. Kazachenko
- Department of Organic and Analytical Chemistry, Institute of Nonferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia; (N.Y.V.); (Y.N.M.); (V.S.B.); (A.V.M.); (A.S.K.)
| | - Omar Al-Dossary
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Marek J. Wojcik
- Faculty of Chemistry, Jagiellonian University, 30-387 Krakow, Poland;
| | - Yaroslava D. Berezhnaya
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
- Institute of Chemical Technologies, Siberian State University of Science and Technology, pr. Mira 82, 660049 Krasnoyarsk, Russia
| | - Evgeniy V. Elsuf’ev
- Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, bld. 24, 660036 Krasnoyarsk, Russia; (A.A.K.); (Y.D.B.); (E.V.E.)
| |
Collapse
|
5
|
Kazachenko AS, Tomilin FN, Pozdnyakova AA, Vasilyeva NY, Malyar YN, Kuznetsova SA, Avramov PV. Theoretical DFT interpretation of infrared spectra of biologically active arabinogalactan sulphated derivatives. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01220-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
6
|
Conformers of 1,2,3,4 –tetrahydroisoquinoline in S0 and S1: An analysis through potential energy surface, hardness principles and vibrational spectroscopy. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127836] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
7
|
Majuta SN, Li C, Jayasundara K, Kiani Karanji A, Attanayake K, Ranganathan N, Li P, Valentine SJ. Rapid Solution-Phase Hydrogen/Deuterium Exchange for Metabolite Compound Identification. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:1102-1114. [PMID: 30980382 DOI: 10.1007/s13361-019-02163-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 05/25/2023]
Abstract
Rapid, solution-phase hydrogen/deuterium exchange (HDX) coupled with mass spectrometry (MS) is demonstrated as a means for distinguishing small-molecule metabolites. HDX is achieved using capillary vibrating sharp-edge spray ionization (cVSSI) to allow sufficient time for reagent mixing and exchange in micrometer-sized droplets. Different compounds are observed to incorporate deuterium with varying efficiencies resulting in unique isotopic patterns as revealed in the MS spectra. Using linear regression techniques, parameters representing contribution to exchange by different hydrogen types can be computed. In this proof-of-concept study, the exchange parameters are shown to be useful in the retrodiction of the amount of deuterium incorporated within different compounds. On average, the exchange parameters retrodict the exchange level with ~ 2.2-fold greater accuracy than treating all exchangeable hydrogens equally. The parameters can be used to produce hypothetical isotopic distributions that agree (± 16% RMSD) with experimental measurements. These initial studies are discussed in light of their potential value for identifying challenging metabolite species.
Collapse
Affiliation(s)
- Sandra N Majuta
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Chong Li
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Kinkini Jayasundara
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Ahmad Kiani Karanji
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Kushani Attanayake
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Nandhini Ranganathan
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Peng Li
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Stephen J Valentine
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA.
| |
Collapse
|
8
|
Silva SC, Rodrigues SM, Nardini V, Vaz ADL, Palaretti V, da Silva GVJ, Vessecchi R, Clososki GC. Conformational dynamics of 4-formylaminoantipyrine based on NMR and theoretical calculations. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
9
|
Vereshchagin AN. Classical and interdisciplinary approaches to the design of organic and hybrid molecular systems. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-1950-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
10
|
Sukhova EV, Yashunsky DV, Kurbatova EA, Tsvetkov YE, Nifantiev NE. Synthesis of a pseudotetrasaccharide corresponding to a repeating unit of the Streptococcus pneumoniae type 6B capsular polysaccharide*. J Carbohydr Chem 2018. [DOI: 10.1080/07328303.2017.1420797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Elena V. Sukhova
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, Russia
| | - Dmitry V. Yashunsky
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, Russia
| | - Ekaterina A. Kurbatova
- Laboratory of Therapeutic Vaccines, Mechnikov Research Institute for Vaccines and Sera, Mal. Kazennyi per. 5a, Moscow, Russia
| | - Yury E. Tsvetkov
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, Russia
| | - Nikolay E. Nifantiev
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, Russia
| |
Collapse
|
11
|
Kumar G, Goel R, Paul K, Luxami V. Investigation of rotameric conformations of substituted imidazo-[1,2- a]pyrazine: experimental and theoretical approaches. RSC Adv 2018; 8:9707-9717. [PMID: 35540834 PMCID: PMC9078725 DOI: 10.1039/c7ra13617j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Accepted: 02/19/2018] [Indexed: 12/16/2022] Open
Abstract
The different rotameric conformations of imidazo-[1,2-a]pyrazine have been synthesized and characterized by means of different experimental techniques, such as NMR, FTIR, and absorption spectroscopy and quantum chemical calculations. The different conformations were stabilized by hydrogen bonds, such as OH⋯N, ArH⋯N and ArH⋯ArH. The ground state optimizations and potential energy surface (PES) scanning profiles produced using density functional theory (DFT) show two stable rotameric forms for each molecule. The relative population of the conformations is affected by the strength of the hydrogen bonds. The calculated absorption spectra and isotopic shielding constants were acquired by time-dependent density functional theory (TD-DFT) and gauge invariant atomic orbitals (GIAO)-DFT, respectively. The strength of the hydrogen bonding interactions that resulted in the different conformations was studied by quantum theory of atoms in molecules (QTAIM). The different rotameric conformations of imidazo-[1,2-a]pyrazine have been synthesized and characterized by means of different experimental techniques, such as NMR, FTIR, and absorption spectroscopy and quantum chemical calculations.![]()
Collapse
Affiliation(s)
- Gulshan Kumar
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
| | - Richa Goel
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
| | - Kamaldeep Paul
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
| | - Vijay Luxami
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
| |
Collapse
|
12
|
Ananikov VP, Eremin DB, Yakukhnov SA, Dilman AD, Levin VV, Egorov MP, Karlov SS, Kustov LM, Tarasov AL, Greish AA, Shesterkina AA, Sakharov AM, Nysenko ZN, Sheremetev AB, Stakheev AY, Mashkovsky IS, Sukhorukov AY, Ioffe SL, Terent’ev AO, Vil’ VA, Tomilov YV, Novikov RA, Zlotin SG, Kucherenko AS, Ustyuzhanina NE, Krylov VB, Tsvetkov YE, Gening ML, Nifantiev NE. Organic and hybrid systems: from science to practice. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.09.001] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|