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Līpiņš DD, Jeminejs A, Ušacka U, Mishnev A, Turks M, Novosjolova I. Regioselective quinazoline C2 modifications through the azide-tetrazole tautomeric equilibrium. Beilstein J Org Chem 2024; 20:675-683. [PMID: 38590535 PMCID: PMC10999978 DOI: 10.3762/bjoc.20.61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 03/18/2024] [Indexed: 04/10/2024] Open
Abstract
2-Chloro-4-sulfonylquinazolines undergo functional group swap when treated with an azide nucleophile: 1) the azide replaces the sulfonyl group at the C4 position; 2) the intrinsic azide-tetrazole tautomeric equilibrium directs the nucleofugal sulfinate from the first step to replace chloride at the C2 position. This transformation is effective with quinazolines bearing electron-rich substituents. Therefore, the title transformations are demonstrated on the 6,7-dimethoxyquinazoline core, which is present in pharmaceutically active substances. The methodology application is showcased by transforming the obtained 4-azido-6,7-dimethoxy-2-sulfonylquinazolines into the α1-adrenoceptor blockers terazosin and prazosin by further C2-selective SNAr reaction and azide reduction.
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Affiliation(s)
- Dāgs Dāvis Līpiņš
- Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, Riga, LV-1048, Latvia
| | - Andris Jeminejs
- Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, Riga, LV-1048, Latvia
| | - Una Ušacka
- Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, Riga, LV-1048, Latvia
- Ķekava Secondary School, Gaismas Str. 9, Ķekava, Ķekava Parish, Ķekava Municipality, LV-2123, Latvia
| | - Anatoly Mishnev
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga, LV-1006, Latvia
| | - Māris Turks
- Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, Riga, LV-1048, Latvia
| | - Irina Novosjolova
- Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, Riga, LV-1048, Latvia
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Leškovskis K, Mishnev A, Novosjolova I, Turks M. Structural Study of Azide-Tetrazole Equilibrium in Pyrido[2,3-d]pyrimidines. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Hu J, Wang Y, shao T, Lian G, Hu K, Liu Y, Zhou M, Wang X, Huang L, Meng X, Jin G. Simple and practical, highly sensitive and responsive recognition of cysteine: Design, synthesis and mechanism study of a novel curcumin fluorescent probe. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Deev SL, Shestakova TS, Shenkarev ZO, Paramonov AS, Khalymbadzha IA, Eltsov OS, Charushin VN, Chupakhin ON. 15N Chemical Shifts and JNN-Couplings as Diagnostic Tools for Determination of the Azide-Tetrazole Equilibrium in Tetrazoloazines. J Org Chem 2021; 87:211-222. [PMID: 34941254 DOI: 10.1021/acs.joc.1c02225] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Selectively 15N-labeled tetrazolo[1,5-b][1,2,4]triazines and tetrazolo[1,5-a]pyrimidines bearing one, two, or three 15N labels were synthesized. The synthesized compounds were studied by 1H, 13C, and 15N NMR spectroscopy in DMSO and TFA solutions, where the azide-tetrazole equilibrium can lead to the formation of two tetrazole (T, T') isomers and one azide (A) isomer for each compound. Incorporation of the 15N-label(s) leads to the appearance of 15N-15N coupling constants (JNN), which can be easily measured via simple 1D 15N NMR spectra, even at natural abundance between labeled and unlabeled 15N atoms. The chemical shifts for the 15N nuclei in the azole moiety are very sensitive to the ring opening and azide formation, thus providing information about the azido-tetrazole equilibrium. At the same time, the 1-2JNN couplings between 15N-labeled atoms in the azole and azine fragments unambiguously determine the fusion type between tetrazole and azine rings in the cyclic isomers T and T'. Thus, combined analysis of 15N chemical shifts and JNN values in selectively isotope-enriched compounds provides an effective diagnostic tool for direct structural determination of tetrazole isomers and azide form in solution. This method was found to be the most simple and efficient way to study the azido-tetrazole equilibrium.
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Affiliation(s)
- Sergey L Deev
- Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira Street, 620002 Yekaterinburg, Russia
| | - Tatyana S Shestakova
- Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira Street, 620002 Yekaterinburg, Russia
| | - Zakhar O Shenkarev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya Street, 117997 Moscow, Russia
| | - Alexander S Paramonov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya Street, 117997 Moscow, Russia
| | - Igor A Khalymbadzha
- Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira Street, 620002 Yekaterinburg, Russia
| | - Oleg S Eltsov
- Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira Street, 620002 Yekaterinburg, Russia
| | - Valery N Charushin
- Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira Street, 620002 Yekaterinburg, Russia.,I. Ya. Postovsky Institute of Organic Synthesis of Ural Branch of the Russian Academy of Sciences, 22 Sofya Kovalevskaya Street, 620108 Yekaterinburg, Russia
| | - Oleg N Chupakhin
- Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira Street, 620002 Yekaterinburg, Russia.,I. Ya. Postovsky Institute of Organic Synthesis of Ural Branch of the Russian Academy of Sciences, 22 Sofya Kovalevskaya Street, 620108 Yekaterinburg, Russia
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Leškovskis K, Zaķis JM, Novosjolova I, Turks M. Applications of Purine Ring Opening in the Synthesis of Imidazole, Pyrimidine, and New Purine Derivatives. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kristaps Leškovskis
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena Str. 3 Riga LV-1048 Latvia
| | - Jānis Miķelis Zaķis
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena Str. 3 Riga LV-1048 Latvia
| | - Irina Novosjolova
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena Str. 3 Riga LV-1048 Latvia
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena Str. 3 Riga LV-1048 Latvia
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Jeminejs A, Novosjolova I, Bizdēna Ē, Turks M. Nucleophile-nucleofuge duality of azide and arylthiolate groups in the synthesis of quinazoline and tetrazoloquinazoline derivatives. Org Biomol Chem 2021; 19:7706-7723. [PMID: 34524320 DOI: 10.1039/d1ob01315g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
5-Arylthio-tetrazolo[1,5-c]quinazolines (tautomers of 2-arylthio-4-azido-quinazolines) undergo facile nucleophilic aromatic substitution reactions with amines, alcohols and alkylthiols. This, combined with the recently reported arylsulfanyl group dance, provides straightforward access to 4-azido-2-N-, O-, S-substituted quinazolines and/or their tetrazolo tautomers from commercially available 2,4-dichloroquinazoline. The azidoazomethine-tetrazole tautomeric equilibrium and the electron-withdrawing character of the fused tetrazolo system plays a central role in the developed transformations. 5-Amino-substituted tetrazolo[1,5-c]quinazolines undergo media-controlled tautomeric equilibrium, which permits them to demonstrate the reactivity traditionally associated with the azido substituent. Furthermore, a method for 5-O-substitited tetrazolo[1,5-a]quinazolines from 2,4-diazidoquinazoline was developed during the structural elucidation of the substitution products. The developed methodology will facilitate medicinal chemistry investigations into quinazoline derivatives and the discovered fluorescent properties of some of the products (e.g., 4-(4-phenyl-1H-1,2,3-triazol-1-yl)-2-(4-methylpiperazin-1-yl)quinazoline: λem. = 461 nm, ΦDCM = 0.89) could serve as a starting point for their further applications in analytical and materials science.
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Affiliation(s)
- Andris Jeminejs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
| | - Irina Novosjolova
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
| | - Ērika Bizdēna
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
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Novosjolova I, Turks M, Jeminejs A, Goliškina SM, Stepanovs D, Bizdēna Ē. Application of Azide-Tetrazole Tautomerism and Arylsulfanyl Group Dance in the Synthesis of Thiosubstituted Tetrazoloquinazolines. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractNucleophilic aromatic substitution reaction between 4-arylthio-2-chloroquinazolines and NaN3 takes place with an unusual sulfanyl group dance and leads to the formation of 5-(arylthio)tetrazolo[1,5-c]-quinazolines, which do not form the azide tautomer and do not undergo CuAAC reactions with alkynes. On the other hand, 5-azidotetrazolo[1,5-a]quinazoline (formally described as 2,4-diazidoquinazoline) undergoes regioselective nucleophilic aromatic substitution with thiols at C5 and forms 5-(alkyl/arylthio)tetrazolo[1,5-a]quinazolines, the structure of which has been proved by X-ray crystallography. The latter exist in tautomeric equilibrium with their 2-azidoquinazoline form, which provides possibility for copper-catalyzed azide–alkyne 1,3-dipolar cycloaddition reaction, leading to the 4-alkyl/arylthio-2-(1H-1,2,3-triazol-1-yl)quinazolines.
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Affiliation(s)
- Irina Novosjolova
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University
| | - Andris Jeminejs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University
| | - Svetlana M. Goliškina
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University
| | | | - Ērika Bizdēna
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University
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Cīrule D, Novosjolova I, Spuris A, Mishnev A, Bizdēna Ē, Turks M. Toward unsymmetrical 2,6-bistriazolylpurine nucleosides. Chem Heterocycl Compd (N Y) 2021. [DOI: 10.1007/s10593-021-02906-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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