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Vhanale B, Kadam D, Shinde A. Synthesis, spectral studies, antioxidant and antibacterial evaluation of aromatic nitro and halogenated tetradentate Schiff bases. Heliyon 2022; 8:e09650. [PMID: 35711981 PMCID: PMC9192811 DOI: 10.1016/j.heliyon.2022.e09650] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 01/07/2022] [Accepted: 05/30/2022] [Indexed: 11/17/2022] Open
Abstract
Herein, we report the synthesis, characterization, and biological properties of eleven (3a-3k) novel Schiff bases. The spectral data of FT-IR, 1H NMR, 13C NMR, and LC-MS are associated with these synthesized compounds. From the FT-IR analysis, we confirmed the azomethine (-C=N-) group and from 1H NMR data, the phenolic –OH proton is appeared at range δ 13.92–14.09ppm due to hydrogen bonding. The LC-MS analysis agreed with molecular ion peaks of synthesized Schiff bases. To evaluate the antibacterial activity of newly synthesized compounds were screened against b. licheniformis, b. species, e. coli, and s. aureus. Furthermore, the antioxidant activity was investigated by two methods 2,2-diphenyl-1-picryl hydrazyl (DPPH) and hydroxyl radical scavenging methods. The (-NO2,-Cl,-Br,-I) substituted compounds have shown good antibacterial activity against tested organisms. Also, these compounds were exhibited higher antioxidant activity by given methods.
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Affiliation(s)
- Bhagwat Vhanale
- P.G. Department of Chemistry, S.C.S.College, Omerga, Maharashtra, 413606, India
| | - Digambar Kadam
- Department of Chemistry, Indira Gandhi Senior College, Nanded, Maharashtra, 431603, India
| | - Avinash Shinde
- P.G. Department of Chemistry, N.E.S. Science College, Nanded, Maharashtra, 431605, India
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2
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Rocha IO, Kappenberg YG, Rosa WC, Frizzo CP, Zanatta N, Martins MAP, Tisoco I, Iglesias BA, Bonacorso HG. Photophysical, photostability, and ROS generation properties of new trifluoromethylated quinoline-phenol Schiff bases. Beilstein J Org Chem 2021; 17:2799-2811. [PMID: 34925619 PMCID: PMC8649202 DOI: 10.3762/bjoc.17.191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 11/19/2021] [Indexed: 11/23/2022] Open
Abstract
A new series of ten examples of Schiff bases, namely (E)-2-(((2-alkyl(aryl/heteroaryl)-4-(trifluoromethyl)quinolin-6-yl)imino)methyl)phenols 3, was easily synthesized with yields of up to 91% from the reactions involving a series of 2-(R-substituted) 6-amino-4-(trifluoromethyl)quinolines 1 and 4(5)-R1-substituted salicylaldehydes 2 - in which alkyl/aryl/heteroaryl for 2-R-substituents are Me, Ph, 4-MeC6H4, 4-FC6H4, 4-NO2C6H4, and 2-furyl, and R1-substituents are 5-NEt2, 5-OCH3, 4-Br, and 4-NO2. Complementarily, the Schiff bases showed low to good quantum fluorescence yield values in CHCl3 (Φf = 0.12-0.80), DMSO (Φf = 0.20-0.75) and MeOH (Φf = 0.13-0.85). Higher values of Stokes shifts (SS) were observed in more polar solvents (DMSO; 65-150 nm and MeOH; 65-130 nm) than in CHCl3 (59-85 nm). Compounds 3 presented good stability under white-LED irradiation conditions and moderate ROS generation properties were observed.
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Affiliation(s)
- Inaiá O Rocha
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Yuri G Kappenberg
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Wilian C Rosa
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Clarissa P Frizzo
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Nilo Zanatta
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Marcos A P Martins
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Isadora Tisoco
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.,Laboratório de Bioinorgânica e Materiais Porfirínicos, Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Bernardo A Iglesias
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.,Laboratório de Bioinorgânica e Materiais Porfirínicos, Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Helio G Bonacorso
- 1Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
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3
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Diaminomaleonitrile derivatives as new potential antichagasic compounds: a study of structure-activity relationships. Future Med Chem 2021; 13:2167-2183. [PMID: 34708659 DOI: 10.4155/fmc-2021-0194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: Schiff bases are synthetically accessible compounds that have been used in medicinal chemistry. Methods & results: In this work, 27 Schiff bases derived from diaminomaleonitrile were synthesized in high yields (80-98%). Molecular docking studies suggested that the Schiff bases interact with the catalytic site of cruzain. The most active cruzain inhibitor, analog 13 (IC50 = 263 nM), was predicted to form an additional hydrophobic contact with Met68 in the binding site of the enzyme. A strong correlation between the IC50 values and ChemScore binding energies was observed (R = 0.99). Kernel-based 2D quantitative structure-activity relationship models for the whole dataset yielded sound correlation coefficients (R2 = 0.844; Q2 = 0.719). Conclusion: These novel and potent cruzain inhibitors are worthwhile starting points in further Chagas disease drug discovery programs.
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Virulence Factors and Antifungal Susceptibility in Candida Species Isolated from Dermatomycosis Patients. Mycopathologia 2020; 186:71-80. [PMID: 33216273 DOI: 10.1007/s11046-020-00509-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/05/2020] [Indexed: 10/20/2022]
Abstract
Dermatomycoses caused by Candida spp. are increasingly common, however there are few reports in the literature regarding their epidemiology, pathogenesis and antifungal susceptibility of these fungal pathogens. This study aimed to identify, characterize virulence and determine the antifungal susceptibility of Candida species isolated from patients with dermatomycoses. We studied a total of 45 yeast samples isolated from dermal scrapings from patients treated at a public hospital, Bauru, São Paulo, Brazil. After identification, the samples were analyzed for protease activity, phospholipase, biofilm formation and antifungal susceptibility. The most common species was Candida albicans (40%), followed by C. krusei (22.22%), C. parapsilosis complex (22.22%) and C. famata (6.67%). Regarding virulence mechanisms, 57.78% and 28.89% of the samples showed enzymatic activity for protease and phospholipase, respectively. A total of 13.33% of the samples showed secretion of both enzymes. All isolates were biofilm producers, and a higher production was observed in C. tropicalis isolates. Regarding the antifungal susceptibility test, 97.78% of the samples had the highest levels of the minimal inhibitory concentration (MIC) for terbinafine, and one C. krusei sample showed intermediate susceptibility to fluconazole. The correct identification of dermatomycosis-related microorganisms, as well as a better knowledge of their pathogenicity and susceptibility against the antifungals used in the clinic, is extremely important for an efficient preventive and therapeutic action.
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Magalhães TFF, da Silva CM, Dos Santos LBF, Santos DA, Silva LM, Fuchs BB, Mylonakis E, Martins CVB, de Resende-Stoianoff MA, de Fátima Â. Cinnamyl Schiff bases: synthesis, cytotoxic effects and antifungal activity of clinical interest. Lett Appl Microbiol 2020; 71:490-497. [PMID: 32777092 DOI: 10.1111/lam.13356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/24/2020] [Accepted: 07/12/2020] [Indexed: 02/01/2023]
Abstract
The aim of this study was to synthesize and investigate the in vitro antifungal properties of 23 cinnamyl Schiff bases. In addition, cytotoxic effects of such cinnamyl Schiff bases against human lung, kidney or red blood cells were also checked. The compounds were synthesized in a single-step, 2 min of reaction under microwave irradiation produced up to 97% yield. Six of the 23 cinnamyl Schiff bases possessed antifungal activities against strains of Candida, Aspergillus, Fonsecaea and, particularly, Cryptococcus species. Indeed, cinnamyl Schiff bases 1 and 23 exhibited minimum inhibitory concentration (MIC) values more than twofold lower than fluconazole (FCZ) against all the Cryptococcus neoformans strains (MIC = 1·33, 1·4 and 5·2 µg ml-1 , respectively) and Cryptococcus gattii strains (MIC = 5·3, 2·8 and 9·2 µg ml-1 , respectively) (12 strains of each species) while cinnamyl Schiff base 11 was as potent as FCZ against all strains from both Cryptococcus species. No significant cytotoxic effects were observed for Schiff bases against human lung, kidney or red blood cells, all presenting selective indexes higher than 10. In conclusion, this study revealed cinnamyl Schiff bases, especially 1 and 23, as new lead anticryptococcal agents for the discovery of novel antifungal drugs. SIGNIFICANCE AND IMPACT OF THE STUDY: The occurrence and severity of fungal infections have increased in recent decades due to resistance to available antifungal drugs and the appearance of new emerging pathogens. Thus, the search for new antifungal agents is mandatory. From a series of 23 cinnamyl Schiff bases, two compounds (1 and 23) were interrogated as new anticryptococcal agents without significant cytotoxicity against human lung, kidney or red blood cells. In turns, these new Schiff bases are lead compounds for the discovery of novel antifungal drugs.
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Affiliation(s)
- T F F Magalhães
- Departamento de Microbiologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - C M da Silva
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - L B F Dos Santos
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - D A Santos
- Departamento de Microbiologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - L M Silva
- Laboratório de Biologia Celular, Fundação Ezequiel Dias, Belo Horizonte, MG, Brazil
| | - B B Fuchs
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School, Brown University, Providence, RI, USA
| | - E Mylonakis
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School, Brown University, Providence, RI, USA
| | - C V B Martins
- Centro de Engenharias e Ciência Exatas, Universidade Estadual do Oeste do Paraná, Toledo, PR, Brazil
| | - M A de Resende-Stoianoff
- Departamento de Microbiologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Â de Fátima
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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6
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da Silva CM, da Silva DL, Magalhães TF, Alves RB, de Resende-Stoianoff MA, Martins FT, de Fátima Â. Iminecalix[4]arenes: Microwave-assisted synthesis, X-ray crystal structures, and anticandidal activity. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.06.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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7
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Synthesis and mesophase behaviour of Schiff base/ester 4-(arylideneamino)phenyl-4″-alkoxy benzoates and their binary mixtures. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.035] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Biswas N, Das K, Sardar B, Srimani D. Acceptorless dehydrogenative construction of CN and CC bonds through catalytic aza-Wittig and Wittig reactions in the presence of an air-stable ruthenium pincer complex. Dalton Trans 2019; 48:6501-6512. [DOI: 10.1039/c8dt04725a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Acceptorless dehydrogenative construction of CN and CC bonds catalysed by air-stable ruthenium complexes.
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Affiliation(s)
- Nandita Biswas
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Kalicharan Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Bitan Sardar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Dipankar Srimani
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
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9
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Cunha Almeida T, Gonzaga Ribeiro LH, Ferreira dos Santos LB, da Silva CM, Tupinambá Branquinho R, de Lana M, Ramos Gadelha F, de Fátima Â. Synthesis, in vitro and in vivo anti-Trypanosoma cruzi and toxicological activities of nitroaromatic Schiff bases. Biomed Pharmacother 2018; 108:1703-1711. [DOI: 10.1016/j.biopha.2018.09.176] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 09/30/2018] [Accepted: 09/30/2018] [Indexed: 10/28/2022] Open
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10
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Porras AMG, Terra BS, Braga TC, Magalhães TFF, Martins CVB, da Silva DL, Baltazar LM, Gouveia LF, de Freitas GJC, Santos DA, Resende-Stoianoff MA, Fuchs BB, Mylonakis E, de Freitas RP, de Fátima Â. Butenafine and analogues: An expeditious synthesis and cytotoxicity and antifungal activities. J Adv Res 2018; 14:81-91. [PMID: 30009053 PMCID: PMC6041462 DOI: 10.1016/j.jare.2018.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 12/29/2022] Open
Abstract
The incidence of fungal infections is considered a serious public health problem worldwide. The limited number of antimycotic drugs available to treat human and animal mycosis, the undesirable side effects and toxicities of the currently available drugs, and the emergence of fungal resistance emphasizes the urgent need for more effective antimycotic medicines. In this paper, we describe a rapid, simple, and efficient synthetic route for preparation of the antifungal agent butenafine on a multigram scale. This novel synthetic route also facilitated the preparation of 17 butenafine analogues using Schiff bases as precursors in three steps or less. All the synthesized compounds were evaluated against the yeast, Cryptococcus neoformans/C. gattii species complexes and the filamentous fungi Trichophyton rubrum and Microsporum gypseum. Amine 4bd, a demethylated analogue of butenafine, and its corresponding hydrochloride salt showed low toxicity in vitro and in vivo while maintaining inhibitory activity against filamentous fungi.
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Affiliation(s)
| | - Bruna Silva Terra
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Taniris Cafiero Braga
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Thais Furtado Ferreira Magalhães
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI, USA
| | - Cleide Viviane Buzanello Martins
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI, USA
- Centro de Engenharias e Ciências Exatas, Universidade Estadual do Oeste do Paraná, Toledo, PR, Brazil
| | - Danielle Letícia da Silva
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI, USA
| | - Ludmila Matos Baltazar
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | - Daniel Assis Santos
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Beth Burgwyn Fuchs
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI, USA
| | - Eleftherios Mylonakis
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI, USA
| | | | - Ângelo de Fátima
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Corresponding author.
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da Silva CM, Silva MM, Reis FS, Ruiz ALTG, de Carvalho JE, Santos JCC, Figueiredo IM, Alves RB, Modolo LV, de Fátima Â. Studies on free radical scavenging, cancer cell antiproliferation, and calf thymus DNA interaction of Schiff bases. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 172:129-138. [PMID: 28549321 DOI: 10.1016/j.jphotobiol.2017.05.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/21/2017] [Accepted: 05/16/2017] [Indexed: 10/19/2022]
Abstract
Thirty-nine Schiff bases were synthesized by performing microwave-assisted condensation of the corresponding aldehydes and aromatic amines. Their reactive nitrogen species (RNS) scavenging activity and inhibitory effects against cancer cell growth were then subsequently investigated. Additionally, the interaction between the calf thymus DNA (ctDNA) and selected Schiff bases was evaluated using fluorescence spectroscopy, and their binding parameters were determined. The yields of the various compounds ranged from moderate to excellent (43-99%) after only a 2-min reaction. The hydroxylated Schiff bases 2, 8, 15, 16, 18, 20, 29, 32, 34, and 37 were found to be potent scavengers of 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals with half-maximal scavenging concentration (SC50) values lower than that of the positive control, resveratrol. The presence of hydroxyl substituents on the aromatic rings also proved essential to the cytotoxicity of the compounds. The binding constants (Kb) obtained using fluorescence spectroscopy ranged from 0.37 to 3.07×105Lmol-1, and were strongly influenced by the structure and hydroxylation degree. Schiff bases 3 and 8 showed promising cytotoxic activity, with half-maximal growth inhibitory (GI50) values in the same order of magnitude as those exhibited by the reference drug, doxorubicin against various cell lines. Interestingly, these compounds also showed the highest Kb, suggesting that the cytotoxic activity could be related to their interaction with the DNA of the tumor cells. The results of this study highlighted some Schiff bases as potential lead compounds for the design of new free radical scavengers and anticancer agents.
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Affiliation(s)
- Cleiton M da Silva
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marina M Silva
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil
| | - Fabiano S Reis
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Faculdade de Ciências Farmacêuticas, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Ana Lúcia T G Ruiz
- Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas (CPQBA), Universidade Estadual de Campinas, Paulínia, SP, Brazil
| | - João E de Carvalho
- Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas (CPQBA), Universidade Estadual de Campinas, Paulínia, SP, Brazil; Grupo de Estudos em Bioquímica de Plantas (GEBioPlan), Departamento de Botânica, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Josué C C Santos
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil
| | - Isis M Figueiredo
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil
| | - Rosemeire B Alves
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luzia V Modolo
- Grupo de Estudos em Bioquímica de Plantas (GEBioPlan), Departamento de Botânica, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ângelo de Fátima
- Grupo de Estudos em Química Orgânica e Biológica (GEQOB), Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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12
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Qin X, Ding G, Wang Z, Zhang S, Li H, Luo Z, Gao F. Remarkable difference between five- and six- number-membered ring transition states for intramolecular proton transfer in excited state. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.02.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Chantrapromma S, Kaewmanee N, Boonnak N, Chantrapromma K, Ghabbour HA, Fun HK. Crystal structure of ( E)-2-hydroxy-4′-methoxyazastilbene. Acta Crystallogr E Crystallogr Commun 2015; 71:571-3. [PMID: 26090124 PMCID: PMC4459367 DOI: 10.1107/s2056989015008348] [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: 04/20/2015] [Accepted: 04/28/2015] [Indexed: 11/15/2022]
Abstract
The title compound has an E conformation with respect to the azomethine C=N bond and the aromatic rings are inclined to one another by 3.29 (4)°. In the crystal, molecules are linked via C—H⋯O hydrogen bonds, forming zigzag chains along [10-1]. The title azastilbene derivative, C14H13NO2 {systematic name: (E)-2-[(4-methoxybenzylidene)amino]phenol}, is a product of the condensation reaction between 4-methoxybenzaldehyde and 2-aminophenol. The molecule adopts an E conformation with respect to the azomethine C=N bond and is almost planar, the dihedral angle between the two substituted benzene rings being 3.29 (4)°. The methoxy group is coplanar with the benzene ring to which it is attached, the Cmethyl—O—C—C torsion angle being −1.14 (12)°. There is an intramolecular O—H⋯N hydrogen bond generating an S(5) ring motif. In the crystal, molecules are linked via C—H⋯O hydrogen bonds, forming zigzag chains along [10-1]. The chains are linked via C—H⋯π interactions, forming a three-dimensional structure.
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14
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dos Santos JA, Polonini HC, Suzuki ÉY, Raposo NRB, da Silva AD. Synthesis of conjugated bile acids/azastilbenes as potential antioxidant and photoprotective agents. Steroids 2015; 98:114-21. [PMID: 25814069 DOI: 10.1016/j.steroids.2015.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 02/09/2015] [Accepted: 03/12/2015] [Indexed: 01/06/2023]
Abstract
A series of 14 bile acids/azastilbenes conjugates (1a-g and 2a-g) was prepared through the condensation of bile amides (1 and 2) and aromatic aldehydes. The newly synthesized conjugates were evaluated in vitro for their antioxidant and photoprotective activities. Six compounds (1, 1a, 1b, 2, 2a and 2b) showed promising antioxidant activity with IC50 values of 19.60-31.83 μg mL(-1). The synthesized compounds presented a varied photoprotection profile, with the SPF ranging from 2 to 9. Among the 16 compounds tested for the protection against UVB sunrays, 3 compounds (2c, 2e and 2g) presented more significant protection than resveratrol and the free azastilbene 3; while the UVAPF increased from 2 in resveratrol and 5 in 3 to 5-11 in the majority of the conjugates.
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Affiliation(s)
- Juliana Alves dos Santos
- Departamento de Química, Universidade Federal de Juiz de Fora, Campus Universitário, Juiz de Fora 36036-900, Brazil.
| | - Hudson Caetano Polonini
- NUPICS Núcleo de Pesquisa e Inovação em Ciências da Saúde, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil; Chemical and Food Engineering Department, Federal University of Santa Catarina, Florianópolis, SC 88040-090, Brazil
| | - Érika Yoko Suzuki
- NUPICS Núcleo de Pesquisa e Inovação em Ciências da Saúde, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil
| | - Nádia R B Raposo
- NUPICS Núcleo de Pesquisa e Inovação em Ciências da Saúde, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil
| | - Adilson David da Silva
- Departamento de Química, Universidade Federal de Juiz de Fora, Campus Universitário, Juiz de Fora 36036-900, Brazil
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15
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2-(Benzylideneamino)phenol: A Promising Hydroxyaldimine with Potent Activity Against Dermatophytoses. Mycopathologia 2014; 179:243-51. [DOI: 10.1007/s11046-014-9850-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022]
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Kaewmanee N, Chantrapromma S, Boonnak N, Quah CK, Fun HK. (E)-2-[(2,4,6-Tri-meth-oxy-benzyl-idene)amino]-phenol. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o62-3. [PMID: 24527001 PMCID: PMC3914096 DOI: 10.1107/s1600536813032996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 12/05/2013] [Indexed: 11/19/2022]
Abstract
There are two independent molecules in the asymmetric unit of the title compound, C16H17NO4, with similar conformations but some differences in their bond angles. Each molecule adopts a trans configuration with respect to the methylidene C=N bond and is twisted with a dihedral angle between the two substituted benzene rings of 80.52 (7)° in one molecule and 83.53 (7)° in the other. All methoxy groups are approximately coplanar with the attached benzene rings, with Cmethyl—O—C—C torsion angles ranging from −6.7 (2) to 5.07 (19)°. In the crystal, independent molecules are linked together by O—H⋯N and O—H⋯O hydrogen bonds and a π–π interaction [centroid–centroid distance of 3.6030 (9) Å], forming a dimer. The dimers are further linked by weak C—H⋯O interactions and another π–π interaction [centroid–centroid distance of 3.9452 (9) Å] into layers lying parallel to the ab plane.
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Affiliation(s)
- Narissara Kaewmanee
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Suchada Chantrapromma
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Nawong Boonnak
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia ; Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
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Kaewmanee N, Chantrapromma S, Boonnak N, Fun HK. 4-[(E)-(4-Eth-oxy-benzyl-idene)amino]-phenol. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o903-4. [PMID: 23795078 PMCID: PMC3685059 DOI: 10.1107/s1600536813012580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 05/08/2013] [Indexed: 12/02/2022]
Abstract
The molecule of the title compound, C15H15NO2, adopts a trans conformation with respect to the methylidene C=N bond and is twisted with a dihedral angle of 26.31 (5)° between the two substituted benzene rings. The ethoxy group is almost coplanar with the bound benzene ring with a C—O—C—C torsion angle of −179.08 (9)°. In the crystal, molecules are linked by O—H⋯N hydrogen bonds and weak C—H⋯O interactions into chains propagating in the [011] and [01-1] directions. C—H⋯π interactions are also present.
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Affiliation(s)
- Narissara Kaewmanee
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
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Magalhães T, da Silva C, de Fátima Â, da Silva D, Modolo L, Martins C, Alves R, Ruiz A, Longato G, de Carvalho J, de Resende-Stoianoff M. Hydroxyaldimines as potent in vitro
anticryptococcal agents. Lett Appl Microbiol 2013; 57:137-43. [DOI: 10.1111/lam.12086] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 03/25/2013] [Accepted: 04/11/2013] [Indexed: 12/15/2022]
Affiliation(s)
- T.F.F. Magalhães
- Departamento de Microbiologia; ICB; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
- Departamento de Química; ICEx; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
| | - C.M. da Silva
- Departamento de Química; ICEx; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
| | - Â. de Fátima
- Departamento de Química; ICEx; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
| | - D.L. da Silva
- Departamento de Microbiologia; ICB; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
- Departamento de Química; ICEx; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
| | - L.V. Modolo
- Departamento de Botânica; ICB; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
| | - C.V.B. Martins
- Centro de Engenharias e Ciências Exatas; Universidade Estadual do Oeste do Paraná; Toledo PR Brazil
| | - R.B. Alves
- Departamento de Química; ICEx; Universidade Federal de Minas Gerais; Belo Horizonte MG Brazil
| | - A.L.T.G. Ruiz
- Centro Pluridisciplinar de Pesquisas Químicas; Biológicas e Agrícolas (CPQBA); Universidade Estadual de Campinas; Paulínia SP Brazil
| | - G.B. Longato
- Centro Pluridisciplinar de Pesquisas Químicas; Biológicas e Agrícolas (CPQBA); Universidade Estadual de Campinas; Paulínia SP Brazil
| | - J.E. de Carvalho
- Centro Pluridisciplinar de Pesquisas Químicas; Biológicas e Agrícolas (CPQBA); Universidade Estadual de Campinas; Paulínia SP Brazil
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20
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Survey of recent advances of in the field of π-conjugated heterocyclic azomethines as materials with tuneable properties. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4778-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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21
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