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Costa GP, Bach MF, Moraes MC, Barcellos T, Lenardão EJ, Silva MS, Alves D. Sequential Organocatalytic Synthesis of [1,2,3]Triazolo[1,5‐
a
]quinolines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000887] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Gabriel P. Costa
- LASOL – CCQFA – Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Mariana F. Bach
- LASOL – CCQFA – Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Maiara C. Moraes
- Laboratory of Biotechnology of Natural and Synthetic Products Universidade de Caxias do Sul Caxias do Sul, RS Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products Universidade de Caxias do Sul Caxias do Sul, RS Brazil
| | - Eder J. Lenardão
- LASOL – CCQFA – Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Márcio S. Silva
- LASOL – CCQFA – Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Diego Alves
- LASOL – CCQFA – Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
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Bakulev VA, Beryozkina T, Thomas J, Dehaen W. The Rich Chemistry Resulting from the 1,3-Dipolar Cycloaddition Reactions of Enamines and Azides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701031] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | | | - Joice Thomas
- Department of Chemistry; The Bridge@USC and Loker Hydrocarbon Research Institute; University of Southern California; 90089-1661 Los Angeles CA USA
| | - Wim Dehaen
- Molecular Design and Synthesis; Department of Chemistry; KU Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
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Efimov IV, Shafikov MZ, Beliaev NA, Volkova NN, Beryozkina TV, Dehaen W, Fan Z, Grishko VV, Lubec G, Slepukhin PA, Bakulev VA. Combined experimental and theoretical studies of regio- and stereoselectivity in reactions of β-isoxazolyl- and β-imidazolyl enamines with nitrile oxides. Beilstein J Org Chem 2016; 12:2390-2401. [PMID: 28144307 PMCID: PMC5238569 DOI: 10.3762/bjoc.12.233] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 10/24/2016] [Indexed: 11/23/2022] Open
Abstract
Reactions of β-azolyl enamines and nitrile oxides were studied by both experimental and theoretical methods. (E)-β-(4-Nitroimidazol-5-yl), (5-nitroimidazol-4-yl) and isoxazol-5-yl enamines smoothly react regioselectively at room temperature in dioxane solution with aryl, pyridyl, and cyclohexylhydroxamoyl chlorides without a catalyst or a base to form 4-azolylisoxazoles as the only products in good yields. The intermediate 4,5-dihydroisoxazolines were isolated as trans isomers during the reaction of (E)-β-imidazol-4-yl enamines with aryl and cyclohexylhydroxamoyl chlorides. Stepwise and concerted pathways for the reaction of β-azolyl enamines with hydroxamoyl chlorides were considered and studied at the B3LYP/Def2-TZVP level of theory combined with D3BJ dispersion correction. The reactions of benzonitrile oxide with both E- and Z-imidazolyl enamines have been shown to proceed stereoselectively to form trans- and cis-isoxazolines, respectively. The preference of E-isomers over Z-isomers, driven by the higher stability of the former, apparently controls the stereoselectivity of the investigated cycloaddition reaction with benzonitrilе oxide. Based on the reactivity of azolyl enamines towards hydroxamoyl chlorides, a novel, effective catalyst-free method was elaborated to prepare 4-azolyl-5-substituted isoxazoles that are otherwise difficult to obtain.
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Affiliation(s)
- Ilya V Efimov
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
| | - Marsel Z Shafikov
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
- Chemistry Department, University of York, Heslington, York, YO10 5DD, UK
| | - Nikolai A Beliaev
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
| | - Natalia N Volkova
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
| | - Tetyana V Beryozkina
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry Nankai University, Collaborative Innovation Center of Chemical Science and Engineering 300071 Tianjin, China
| | - Viktoria V Grishko
- Laboratory of Biologically Active Compounds, Institute of Technical Chemistry Ural Branch of Russian Academy of Sciences, 3 Academician Korolev str., Perm, Russia
| | - Gert Lubec
- Medical University of Vienna, Department of Pediatrics, 14 Lazarettgasse, 1090 Vienna, Austria
| | - Pavel A Slepukhin
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
- I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of Russian Academy of Sciences, 20 S. Kovalevskaya str., 620990 Yekaterinburg, Russia
| | - Vasiliy A Bakulev
- TOS Department, Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira str., 620002 Yekaterinburg, Russia
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Rozin Y, Zhidovinov S, Beryozkina T, Shafran Y, Lubec G, Eltsov O, Slepukhin P, Knippschild U, Bischof J, Dehaen W, Bakulev V. A novel transformation of β-1,2,3-thiadiazol-5-yl enamines into thieno[2,3-d]pyridazines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Self-condensation of β-(isoxazol-5-yl) enamines under treatment with acetyl chloride and acids. Synthesis of novel 1,3-diisoxazolyl-1,3-dieneamines and 1,3,5-triisoxazolyl benzenes. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Efimov I, Bakulev V, Beliaev N, Beryozkina T, Knippschild U, Leban J, Zhi-Jin F, Eltsov O, Slepukhin P, Ezhikova M, Dehaen W. Reactions of β-Azolylenamines with Sulfonyl Azides as an Approach toN-Unsubstituted 1,2,3-Triazoles and Ethene-1,2-diamines. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402130] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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