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Neto JSS, Coelho FT, Doerner CV, Braga AL, Lião LM, Coelho FL. 3-Halochromones Through Oxidative α-Halogenation of Enaminones and its Photophysical Investigation: Another Case of Photo-induced Partially Aromatised Intramolecular Charge Transfer? Chem Asian J 2024; 19:e202300852. [PMID: 38102074 DOI: 10.1002/asia.202300852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 12/17/2023]
Abstract
A versatile synthesis strategy for fluorescent 3-halo-4H-chromen-4-one derivatives is reported. The method involves the oxidative α-halogenation of enaminones performed by an efficient and sustainable oxidation system. The use of Oxone® in combination with KCl, KBr, or KI enables the preparation of 3-chloro-, 3-bromo-, or 3-iodo-4H-chromen-4-one in good to excellent yields, with great functional group tolerance where the protocol is amenable to gram-scale synthesis. The analysis of the photophysical properties of the presented 4H-chromen-4-one showed absorption in the UV region and fluorescence emission in the violet-to-cyan region with a relatively large Stokes shift. In solution, all compounds present a dual fluorescence emission, regardless of the solvent, assigned to a partially aromatised intramolecular charge transfer mechanism, considering the presence of a pseudo-aromatic ring in the chromone scaffold and the absence of the influence of substituent electronic features in optical behaviour.
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Affiliation(s)
- José S S Neto
- Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil
| | - Filipe T Coelho
- Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil
| | - Carlos V Doerner
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-970, Florianópolis, SC, Brazil
| | - Antonio L Braga
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-970, Florianópolis, SC, Brazil
| | - Luciano M Lião
- Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil
| | - Felipe L Coelho
- Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil
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Narváez-Ordoñez EG, Pabón-Carcelén KA, Zurita-Saltos DA, Bonilla-Valladares PM, Yánez-Darquea TG, Ramos-Guerrero LA, Ulic SE, Jios JL, Echeverría GA, Piro OE, Langer P, Alcívar-León CD, Heredia-Moya J. Synthesis, Experimental and Theoretical Study of Azidochromones. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27092636. [PMID: 35565987 PMCID: PMC9105743 DOI: 10.3390/molecules27092636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/10/2022] [Accepted: 02/16/2022] [Indexed: 11/16/2022]
Abstract
A series of 2-(haloalkyl)-3-azidomethyl and 6-azido chromones has been synthetized, characterized and studied by theoretical (DFT calculations) and spectroscopic methods (UV-Vis, NMR). The crystal structure of 3-azidomethyl-2-difluoromethyl chromone, determined by X-ray diffraction methods, shows a planar framework due to extended π-bond delocalization. Its molecular packing is stabilized by F···H, N···H and O···H hydrogen bonds, π···π stacking and C–O···π intermolecular interactions. Moreover, AIM, NCI and Hirshfeld analysis evidenced that azido moiety has a significant role in the stabilization of crystal packing through weak intermolecular interactions, where analysis of electronic density suggested closed-shell (CS) interatomic interactions.
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Affiliation(s)
- Ena G. Narváez-Ordoñez
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Kevin A. Pabón-Carcelén
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Daniel A. Zurita-Saltos
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Pablo M. Bonilla-Valladares
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Trosky G. Yánez-Darquea
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | | | - Sonia E. Ulic
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Bv. 120 No 1465, La Plata 1900, Buenos Aires, Argentina;
- Departamento de Ciencias Básicas, Facultad de Ciencias Exactas, Universidad Nacional de Luján, Rutas 5 y 7, Luján 6700, Buenos Aires, Argentina
| | - Jorge L. Jios
- Laboratorio UPL (UNLP-CIC), Camino Centenario e/505 y 508 (1897) M.B. Gonnet and Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, República Argentina. 47 esq. 115, La Plata 1900, Buenos Aires, Argentina;
| | - Gustavo A. Echeverría
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), La Plata 1900, Buenos Aires, Argentina; (G.A.E.); (O.E.P.)
| | - Oscar E. Piro
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), La Plata 1900, Buenos Aires, Argentina; (G.A.E.); (O.E.P.)
| | - Peter Langer
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany;
- Leibniz Institut für Katalyse, Universität Rostock e. V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Christian D. Alcívar-León
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
- Correspondence: (C.D.A.-L.); (J.H.-M.)
| | - Jorge Heredia-Moya
- Centro de Investigación Biomédica (CENBIO), Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito 170527, Ecuador
- Correspondence: (C.D.A.-L.); (J.H.-M.)
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Peng Y, Gong H, Wang J, Chen H, Deng H, Hao J, Wan W. Regiospecific C2‐Difluoroalkylation on Chromone via Transition‐Metal‐free Oxidative Decarboxylation of Aryldifluoroacetic acids. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yi Peng
- Shanghai University Department of chemistry CHINA
| | - Haiying Gong
- Shanghai University Department of chemistry CHINA
| | - Juan Wang
- Shanghai University Department of chemistry CHINA
| | - Hua Chen
- Shanghai University Department of chemistry CHINA
| | - Hongmei Deng
- Shanghai University laboratory of Microstructures CHINA
| | - Jian Hao
- Shanghai University Department of chemistry CHINA
| | - Wen Wan
- Shanghai University of Science and Technology: Shanghai University Deptartment of Chemistry Shangda Road 99 200444 Shanghai CHINA
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Copper(II) and oxidovanadium(IV) complexes of chromone Schiff bases as potential anticancer agents. J Biol Inorg Chem 2021; 27:89-109. [PMID: 34817681 DOI: 10.1007/s00775-021-01913-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/30/2021] [Indexed: 12/14/2022]
Abstract
We report the synthesis, characterization and biological screening of new chromone Schiff bases derived from the condensation of three 6-substituted-3-formyl-chromones with pyridoxal (HL1-3) and its Cu(II) complexes [Cu(L1-3)Cl], 1-3. For the 6-methyl derivative, HL2, the VIVO-complex [VO(L2)Cl] (5), as well as ternary Cu and VIVO complexes with 1,10-phenanthroline (phen), [Cu(L2)(phen)Cl] (4) and [VO(L2)(phen)Cl] (6), were also prepared and evaluated. Their stability in aqueous medium and radical scavenging activity toward DPPH are screened, with [Cu(L2)(phen)Cl] (4) showing hydrolytic stability and [VO(L2)(phen)Cl] (6) high radical scavenging activity. Spectroscopic studies establish bovine serum albumin (BSA), a model for HSA, as a potential reversible carrier of [Cu(L2)(phen)Cl] in blood with KBC ≈ 105 M-1. The cytotoxic activity of a group of compounds is evaluated against a panel of human cancer cell lines of different origin (ovary, cervix, brain and breast) and compared to normal cells. Our results indicate that Cu complexes are more cytotoxic than the ligands but not selective towards cancer cells. The most potent complexes (4 and 6) are further evaluated for their apoptotic potential, induction of reactive oxygen species (ROS) and genotoxicity. Both complexes efficiently triggered cell death through apoptosis as evaluated by DNA morphology and TUNEL assay, increased ROS formation as determined by DCFDA (2',7'-dichlorodihydrofluorescein diacetate) analysis, and induced genotoxic damage as visualized via COMET assay in all cancer cells under study. Therefore, 4 and 6 may be potential precursor anticancer molecules, yet they need to be targeted toward cancer cells.
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Narváez O EG, Bonilla V. PM, Zurita DA, Alcívar L. CD, Heredia-Moya J, Ulic SE, Jios JL, Piro OE, Echeverría GA, Langer P. Synthesis, experimental and theoretical study of novel 2-haloalkyl (-CF2H, -CCl2H, -CF2CF3)-, 3-bromo and bromomethyl substituted chromones. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2020.109717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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