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Obijalska E, Pietrzak A, Constantinides CP, Sommer RD, Kaszyński P. "Super stable" Blatter radicals through ArLi addition: surprising chemistry of 7-(trifluoromethyl)benzo[ e][1,2,4]triazine. Chem Commun (Camb) 2023; 59:4008-4011. [PMID: 36916722 DOI: 10.1039/d3cc00832k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
Addition of PhLi to 7-(CF3)benzo[e][1,2,4]triazine at -78 °C gives the "super stable" Blatter radical in high yields, while above -5 °C two additional products are formed. XRD analysis revealed the formation of a "trimer" and a benzo[f][1,2,4]triazepine via a novel mechanism. The latter is formed from the anion generated from the isolated radical, which suggests its instability in organic batteries.
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Affiliation(s)
- Emilia Obijalska
- Faculty of Chemistry, University of Łódź, Tamka 12, 91-403 Łódź, Poland.
| | - Anna Pietrzak
- Faculty of Chemistry, Łódź University of Technology, Żeromskiego 116, 90-924 Łódź, Poland
| | | | - Roger D Sommer
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
| | - Piotr Kaszyński
- Faculty of Chemistry, University of Łódź, Tamka 12, 91-403 Łódź, Poland. .,Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland.,Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN 37130, USA
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2
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Borissov A, Maurya YK, Moshniaha L, Wong WS, Żyła-Karwowska M, Stępień M. Recent Advances in Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds. Chem Rev 2022; 122:565-788. [PMID: 34850633 PMCID: PMC8759089 DOI: 10.1021/acs.chemrev.1c00449] [Citation(s) in RCA: 215] [Impact Index Per Article: 107.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Indexed: 12/21/2022]
Abstract
This review surveys recent progress in the chemistry of polycyclic heteroaromatic molecules with a focus on structural diversity and synthetic methodology. The article covers literature published during the period of 2016-2020, providing an update to our first review of this topic (Chem. Rev. 2017, 117 (4), 3479-3716).
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Affiliation(s)
| | | | | | | | | | - Marcin Stępień
- Wydział Chemii, Uniwersytet
Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
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3
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Rakitin OA. Fused 1,2,5-thia- and 1,2,5-selenadiazoles: Synthesis and application in materials chemistry. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152230] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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4
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Diethyl pyrrole-2,5-dicarboxylate. MOLBANK 2020. [DOI: 10.3390/m1117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The title compound was obtained in moderate yield by a new and unexpected base-induced ring contraction from a 1,4-thiazine precursor. Its X-ray structure showing hydrogen bonded dimers was compared with those of other crystallographically characterised 2-acylpyrroles.
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5
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Rogers FJM, Norcott PL, Coote ML. Recent advances in the chemistry of benzo[e][1,2,4]triazinyl radicals. Org Biomol Chem 2020; 18:8255-8277. [DOI: 10.1039/d0ob01394c] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Benzo[e][1,2,4]triazinyl, or Blatter radicals, are stable free radicals with customisable magnetic, spectroscopic and electrochemical properties, and wide-ranging applications in synthesis and functional materials.
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Affiliation(s)
- Fergus J. M. Rogers
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
| | - Philip L. Norcott
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
| | - Michelle L. Coote
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
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6
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Ogurtsov VA, Karpychev YV, Nelyubina YV, Primakov PV, Koutentis PA, Rakitin OA. Synthesis of 6,7-Dihydropyrrolo[2,1-c
][1,3]thiazino[3,2-a
]pyrazine-4(11bH
)-(thi)ones from 1,2-Dithiolo-3-(thi)ones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Vladimir A. Ogurtsov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospekt 119991 Moscow Russia
| | - Yury V. Karpychev
- JSC State Scientific Research Institute “Kristall”; 606007 Dzerzhinsk, Nizhny Novgorod Region Russian Federation
| | - Yulia V. Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 119991 Moscow Russia
| | - Petr V. Primakov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 119991 Moscow Russia
- Department of Chemistry; Moscow State; 119899 Moscow Russia
| | | | - Oleg A. Rakitin
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospekt 119991 Moscow Russia
- Nanotechnology Education and Research Center; South Ural State University; 454080 Chelyabinsk Russian Federation
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7
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Monzer A, Jabotian N, Ballout F, Zhu JS, Kurth MJ, Haddadin MJ, Gali-Muhtasib H. Novel 2-(5-Imino-5 H-isoquinolones[3,4- b]quinoxalin-7-ylmethyl)-benzonitrile ( DIQ3) and Other Related Derivatives Targeting Colon Cancer Cells: Syntheses and in Vitro Models. ACS OMEGA 2019; 4:3205-3212. [PMID: 30842984 PMCID: PMC6396124 DOI: 10.1021/acsomega.8b02698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
Chemotherapy has been shown to be effective in reducing the progression and development of cancer in metastatic patients. However, drug selectivity is still a major issue for most chemotherapeutics. In this study, we synthesized four novel heterocyclic compounds having similarity in structure with quinone systems whereby nitrogen atoms replace the oxygen atoms. The anticancer activity of these compounds (DIQ3-6) was tested against HCT116 human colon cancer cells. We showed that all four heterocycles caused significant reduction in colon cancer cell viability at doses as low as 4 μM, a concentration that was not cytotoxic to normal human FHs74Int intestinal cell lines. Interestingly, these heterocycles inhibited colon sphere formation in 3D cultures at first generation (G1), mainly because of inhibition of proliferation as evidenced by Ki67 staining. Thus, DIQ3 causes sufficient eradication of the self-renewal ability of the highly resistant cancer stem cells. This study represents the first documentation of the activity of these novel heterocyclic compounds, particularly compound DIQ3, and their potential therapeutic use in targeting colon cancer self-renewal capacity. Our findings provide the basis for proposing these nontoxic and stable compounds for additional testing against cancer.
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Affiliation(s)
- Alissar Monzer
- Department
of Biology, and Center for Drug Discovery, and Department of
Chemistry, American University of Beirut, Riad El Solh, 1107 2020 Beirut, Lebanon
| | - Nayri Jabotian
- Department
of Biology, and Center for Drug Discovery, and Department of
Chemistry, American University of Beirut, Riad El Solh, 1107 2020 Beirut, Lebanon
| | - Farah Ballout
- Department
of Biology, and Center for Drug Discovery, and Department of
Chemistry, American University of Beirut, Riad El Solh, 1107 2020 Beirut, Lebanon
| | - Jie S. Zhu
- Department
of Chemistry, University of California at
Davis, One Shields Avenue, Davis, California 95616-5295, United States
| | - Mark J. Kurth
- Department
of Chemistry, University of California at
Davis, One Shields Avenue, Davis, California 95616-5295, United States
| | - Makhluf J. Haddadin
- Department
of Biology, and Center for Drug Discovery, and Department of
Chemistry, American University of Beirut, Riad El Solh, 1107 2020 Beirut, Lebanon
| | - Hala Gali-Muhtasib
- Department
of Biology, and Center for Drug Discovery, and Department of
Chemistry, American University of Beirut, Riad El Solh, 1107 2020 Beirut, Lebanon
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Regioselective Fluorination of 7-Oxo-1,2,4-benzotriazines Using Selectfluor. Molecules 2019; 24:molecules24020282. [PMID: 30646524 PMCID: PMC6359188 DOI: 10.3390/molecules24020282] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/03/2019] [Accepted: 01/08/2019] [Indexed: 12/11/2022] Open
Abstract
7-Oxo-1,2,4-benzotriazines (benzo[1,2,4]triazin-7-ones) are reversible thioredoxin reductase inhibitors that exhibit very strong correlations to pleurotin. In this article, we provide the first synthesis of fluorinated derivatives. Fluorination using Selectfluor of benzo[1,2,4]triazin-7-ones occurs regioselectively and in high yield at the enamine-activated position. This electron N-lone pair activation overrides the activation/deactivation effects of some other substituents. The reaction time was significantly reduced with the use of microwave irradiation at 120 °C and 7 bar. The cytotoxicity and cyclic voltammetry measurements for 8-fluoro-1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-one (2) are presented and compared with its synthetic precursor, 1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-one (1a).
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