1
|
Synthesis of Pyrimidine Conjugates with 4-(6-Amino-hexanoyl)-7,8-difluoro-3,4-dihydro-3-methyl-2H-[1,4]benzoxazine and Evaluation of Their Antiviral Activity. Molecules 2022; 27:molecules27134236. [PMID: 35807481 PMCID: PMC9268552 DOI: 10.3390/molecules27134236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 12/10/2022] Open
Abstract
A series of pyrimidine conjugates containing a fragment of racemic 7,8-difluoro-3,4-dihydro-3-methyl-2H-[1,4]benzoxazine and its (S)-enantiomer attached via a 6-aminohexanoyl fragment were synthesized by the reaction of nucleophilic substitution of chlorine in various chloropyrimidines. The structures of the synthesized compounds were confirmed by 1H, 19F, and 13C NMR spectral data. Enantiomeric purity of optically active derivatives was confirmed by chiral HPLC. Antiviral evaluation of the synthesized compounds has shown that the replacement of purine with a pyrimidine fragment leads to a decrease in the anti-herpesvirus activity compared to the lead compound, purine conjugate. The studied compounds did not exhibit significant activity against influenza A (H1N1) virus.
Collapse
|
2
|
Syntheses, crystal structures, antibacterial activities and non-linear optical properties based on DFT calculation of two substituted benzyl piperidinium salts tetrahalogenated copper(II). J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
3
|
Ivoilova A, Malakhova N, Mozharovskaia P, Nikiforova A, Tumashov A, Kozitsina A, Ivanova A, Rusinov V. Study of Different Carbonaceous Materials as Modifiers of Screen‐Printed Carbon Electrodes for Detection of the Triazid as Potential Antiviral Drug. ELECTROANAL 2022. [DOI: 10.1002/elan.202100657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Nataliya Malakhova
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
| | - Polina Mozharovskaia
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
| | - Aleksandra Nikiforova
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
| | - Andrey Tumashov
- FSBSI I Ya Postovsky Institute of Organic Synthesis of Ural Branch of the Russian Academy of Sciences RUSSIAN FEDERATION
| | | | | | | |
Collapse
|
4
|
Ivoilova A, Mikhalchenko LV, Tsmokalyuk A, Leonova M, Lalov A, Mozharovskaia P, Kozitsina AN, Ivanova AV, Rusinov VL. Redox Conversions of 5-Methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4triazolo[1,5-a]pyrimidinide L-Arginine Monohydrate as a Promising Antiviral Drug. Molecules 2021; 26:5087. [PMID: 34443674 PMCID: PMC8400642 DOI: 10.3390/molecules26165087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/17/2021] [Accepted: 08/18/2021] [Indexed: 11/25/2022] Open
Abstract
This article presents the results of a study of electrochemical transformations in aqueous and aprotic media of 5-methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidinide l-arginine monohydrate (1a, Triazid) obtained by electrochemical methods and ESR spectroscopy. The effect of pH on the current and the reduction potential of 1a in an aqueous Britton-Robinson buffer solution was studied. It was found that 1a is irreversibly reduced in aqueous acidic media on a glassy carbon electrode in one stage with the participation of six electrons and the formation of 5-methyl-6-amino-7-oxo-1,2,4-triazolo[1,5-a]pyrimidin. The electroreduction of 1a in DMF on a background of tetrabutylammonium salts proceeds in two stages, controlled by the kinetics of second-order reactions. In the first stage, the reduction of 1a is accompanied by protonation by the initial compound of the basic intermediate products formed in the electrode reaction (self-protonation mechanism). The second quasi-reversible stage of the electroreduction 1a corresponds to the formation of a dianion radical upon the reduction of the heterocyclic anion 5-methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidin, which is formed upon the potentials of the first peak. The ESR spectrum of the radical dianion was recorded upon electroreduction of Triazid in the presence of Bu4NOH. The effect of the formation of ion pairs on the reversibility of the second peak of the 1a transformation is shown. A change in the rate and regioselectivity of the protonation of the dianion radical in the presence of Na+ and Li+ ions is assumed. The results of studying the electroreduction of 1a by ESR spectroscopy with a TEMPO trap make it possible to assume the simultaneous formation of both a nitroxyl radical and a radical with the spin density localized on the nitrogen at the 4 position of the six-membered ring.
Collapse
Affiliation(s)
- Alexandra Ivoilova
- Institute of Chemical Technology, Ural Federal University, 19, Mira St, 620002 Ekaterinburg, Russia; (A.I.); (A.T.); (P.M.); (A.N.K.); (A.V.I.)
| | - Ludmila V. Mikhalchenko
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, 119991 Moscow, Russia; (L.V.M.); (M.L.); (A.L.)
| | - Anton Tsmokalyuk
- Institute of Chemical Technology, Ural Federal University, 19, Mira St, 620002 Ekaterinburg, Russia; (A.I.); (A.T.); (P.M.); (A.N.K.); (A.V.I.)
| | - Marina Leonova
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, 119991 Moscow, Russia; (L.V.M.); (M.L.); (A.L.)
| | - Andrey Lalov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, 119991 Moscow, Russia; (L.V.M.); (M.L.); (A.L.)
| | - Polina Mozharovskaia
- Institute of Chemical Technology, Ural Federal University, 19, Mira St, 620002 Ekaterinburg, Russia; (A.I.); (A.T.); (P.M.); (A.N.K.); (A.V.I.)
| | - Alisa N. Kozitsina
- Institute of Chemical Technology, Ural Federal University, 19, Mira St, 620002 Ekaterinburg, Russia; (A.I.); (A.T.); (P.M.); (A.N.K.); (A.V.I.)
| | - Alla V. Ivanova
- Institute of Chemical Technology, Ural Federal University, 19, Mira St, 620002 Ekaterinburg, Russia; (A.I.); (A.T.); (P.M.); (A.N.K.); (A.V.I.)
| | - Vladimir L. Rusinov
- Institute of Chemical Technology, Ural Federal University, 19, Mira St, 620002 Ekaterinburg, Russia; (A.I.); (A.T.); (P.M.); (A.N.K.); (A.V.I.)
- Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22 Sofia Kovalevsky St, 620137 Ekaterinburg, Russia
| |
Collapse
|