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Grafakou ME, Djeddi S, Tarek H, Skaltsa H. Secondary metabolites from the aerial parts of Centaurea papposa (Coss.) Greuter. BIOCHEM SYST ECOL 2018. [DOI: 10.1016/j.bse.2017.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chain FE, Leyton P, Paipa C, Fortuna M, Brandán SA. FT-IR, FT-Raman, UV-visible, and NMR spectroscopy and vibrational properties of the labdane-type diterpene 13-epi-sclareol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:303-13. [PMID: 25498827 DOI: 10.1016/j.saa.2014.11.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/19/2014] [Accepted: 11/20/2014] [Indexed: 05/08/2023]
Abstract
In this work, FT-IR, FT-Raman, UV-Visible and NMR spectroscopies and density functional theory (DFT) calculations were employed to study the structural and vibrational properties of the labdane-type diterpene 13-epi-sclareol using the hybrid B3LYP method together with the 6-31G(∗) basis set. Three stable structures with minimum energy found on the potential energy curves (PES) were optimized, and the corresponding molecular electrostatic potentials, atomic charges, bond orders, stabilization energies and topological properties were computed at the same approximation level. The complete assignment of the bands observed in the vibrational spectrum of 13-epi-sclareol was performed taking into account the internal symmetry coordinates for the three structures using the scaled quantum mechanical force field (SQMFF) methodology at the same level of theory. In addition, the force constants were calculated and compared with those reported in the literature for similar compounds. The predicted vibrational spectrum and the calculated (1)H NMR and (13)C NMR chemical shifts are in good agreement with the corresponding experimental results. The theoretical UV-Vis spectra for the most stable structure of 13-epi-sclareol demonstrate a better correlation with the corresponding experimental spectrum. The study of the three conformers by means of the theory of atoms in molecules (AIM) revealed different H bond interactions and a strong dependence of the interactions on the distance between the involved atoms. Furthermore, the natural bond orbital (NBO) calculations showed the characteristics of the electronic delocalization for the two six-membered rings with chair conformations.
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Affiliation(s)
- Fernando E Chain
- INQUINOA-CONICET, Instituto de Química Orgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina
| | - Patricio Leyton
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Carolina Paipa
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, Quillota 910, Viña del Mar, Chile
| | - Mario Fortuna
- Cátedra de Química Orgánica, Dpto. Cs. Básicas, Facultad de Agronomía y Zootecnia, Universidad Nacional de Tucumán, Av. Néstor Kirchner, 4000, San Miguel de Tucumán, Tucumán, Argentina
| | - Silvia A Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina.
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Chain F, Romano E, Leyton P, Paipa C, Catalán CAN, Fortuna MA, Brandán SA. An experimental study of the structural and vibrational properties of sesquiterpene lactone cnicin using FT-IR, FT-Raman, UV–visible and NMR spectroscopies. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.02.057] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bruno M, Bancheva S, Rosselli S, Maggio A. Sesquiterpenoids in subtribe Centaureinae (Cass.) Dumort (tribe Cardueae, Asteraceae): distribution, (13)C NMR spectral data and biological properties. PHYTOCHEMISTRY 2013; 95:19-93. [PMID: 23948259 DOI: 10.1016/j.phytochem.2013.07.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 07/05/2013] [Accepted: 07/05/2013] [Indexed: 05/22/2023]
Abstract
Asteraceae Bercht. & J. Presl is one of the biggest and most economically important plant families. The taxonomy and phylogeny of Asteraceae is rather complex and according to the latest and most reliable taxonomic classification of Panero & Funk, based on the analysis of nine chloroplast regions, the family is divided into 12 subfamilies and 35 tribes. One of the largest tribes of Asteraceae is Cardueae Cass. with four subtribes (Carlininae, Echinopinae, Carduinae and Centaureinae) and more than 2500 species. Susanna & Garcia-Jacas have organized the genera of Centaureinae (about 800 species) into seven informal groups, which recent molecular studies have confirmed: 1. Basal genera; 2. Volutaria group; 3. Rhaponticum group; 4. Serratula group; 5. Carthamus group; 6. Crocodylium group; 7. Centaurea group. This review summarizes reports on sesquiterpenoids from the Centaureinae subtribe of the Asteraceae family, as well as the (13)C NMR spectral data described in the literature. It further reviews studies concerning the biological activities of these metabolites. For this work, literature data on sesquiterpenes from the Centaureinae subtribe were retrieved with the help of the SciFinder database and other similar data banks. All entries from 1958 until the end of 2011 were considered. This review is addressed to scientists working in the metabolomics field such as chemists, botanists, etc., the spectroscopic data reported make this work a good tool for structural elucidation, the biological section gives useful information to those who wish to study the structure activity relationships.
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Affiliation(s)
- Maurizio Bruno
- STEBICEF, Section of Chemistry, University of Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy.
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Forgo P, Zupkó I, Molnár J, Vasas A, Dombi G, Hohmann J. Bioactivity-guided isolation of antiproliferative compounds from Centaurea jacea L. Fitoterapia 2012; 83:921-5. [PMID: 22537643 DOI: 10.1016/j.fitote.2012.04.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 04/06/2012] [Accepted: 04/09/2012] [Indexed: 11/29/2022]
Abstract
Bioassay-guided fractionation of the chloroform extract of Centaurea jacea L. afforded the isolation of cirsiliol, apigenin, hispidulin, eupatorin, isokaempferide, axillarin, centaureidin, 6-methoxykaempferol 3-methyl ether, trachelogenin, cnicin, 4'-acetylcnicin and three aliphatic glucose diesters, including the new natural product 1β-isobutanoyl-2-angeloyl-glucose. The structures of the compounds were established on the basis of spectroscopic analyses (UV, MS and NMR). All compounds were isolated for the first time from this species. The compounds were evaluated for their tumour cell growth inhibitory activities on HeLa, MCF-7 and A431 cells. Different types of secondary metabolites (flavonoids, sesquiterpenes) were found to be responsible for the antitumour effects of the extracts; the highest activity was exerted by centaureidin, in addition to moderately active compounds (cirsiliol, isokaempferide, apigenin, hispidulin, cnicin and 4'-acetylcnicin).
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Affiliation(s)
- Peter Forgo
- Department of Pharmacognosy, University of Szeged, Szeged, Hungary
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Bach SM, Fortuna MA, Attarian R, de Trimarco JT, Catalán CAN, Av-Gay Y, Bach H. Antibacterial and Cytotoxic Activities of the Sesquiterpene Lactones Cnicin and Onopordopicrin. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600202] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The antimicrobial and cytotoxic activities of chloroform extracts from the weeds Centaurea tweediei and C. diffusa, and the main sesquiterpene lactones isolated from these species, onopordopicrin and cnicin, respectively, were assayed. Results show that the chloroform extracts from both Centaurea species possess antibacterial activities against a panel of Gram-positive and Gram-negative bacteria. Remarkable antibacterial activity against methicillin-resistant Staphylococcus aureus was also measured. Both the extracts and the purified sesquiterpene lactones show high cytotoxicity against human-derived macrophages. Despite this cytotoxicity, C. diffusa chloroform extract and cnicin are attractive candidates for evaluation as antibiotics in topical preparations against skin-associated pathogens.
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Affiliation(s)
- Sandra M. Bach
- Division of Infectious Diseases, Department of Medicine, University of British Columbia, 2733 Heather Street, Vancouver, V5Z 3J5, Canada
- INQUINOA-CONICET and Instituto de Química Orgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, S. M. de Tucumán, (T4000INI), Argentina
| | - Mario A. Fortuna
- Departmento de Química Orgánica, Facultad de Agronomía y Zootecnia, Universidad Nacional de Tucumán, S. M. de Tucumán, (T4000INI), Argentina
| | - Rodgoun Attarian
- Division of Infectious Diseases, Department of Medicine, University of British Columbia, 2733 Heather Street, Vancouver, V5Z 3J5, Canada
| | - Juliana T. de Trimarco
- Departmento de Química Orgánica, Facultad de Agronomía y Zootecnia, Universidad Nacional de Tucumán, S. M. de Tucumán, (T4000INI), Argentina
| | - César A. N. Catalán
- INQUINOA-CONICET and Instituto de Química Orgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, S. M. de Tucumán, (T4000INI), Argentina
| | - Yossef Av-Gay
- Division of Infectious Diseases, Department of Medicine, University of British Columbia, 2733 Heather Street, Vancouver, V5Z 3J5, Canada
| | - Horacio Bach
- Division of Infectious Diseases, Department of Medicine, University of British Columbia, 2733 Heather Street, Vancouver, V5Z 3J5, Canada
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Dob T, Dahmane D, Gauriat-Desrdy B, Daligault V. Essential Oil Composition ofCentaurea pullataL. JOURNAL OF ESSENTIAL OIL RESEARCH 2009. [DOI: 10.1080/10412905.2009.9700207] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Dob T, Dahmane D, Gauriat-Desrdy B, Daligault V. Essential Oil Composition ofCentaurea calcitrapaL. From Algeria. JOURNAL OF ESSENTIAL OIL RESEARCH 2009. [DOI: 10.1080/10412905.2009.9700151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Quantitative analysis of sesquiterpene lactone cnicin in seven Centaurea species wild-growing in Serbia and Montenegro using 1H-NMR spectroscopy. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2007. [DOI: 10.2298/jsc0712275t] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
1H-NMR spectroscopy was applied for the quantitative analysis of cnicin, a bioactive germacranolide type sesquiterpene lactone, in the aerial parts of seven wild-growing Centaurea species collected in Serbia and Montenegro. The analysis was performed by comparison of the integral of the one-proton signal of cnicin (H-13, ? 5.75) with that of the two-proton singlet ( ? 6.98) of 2,6-bis(1,1-dimethylethyl)-4-methylphenol (BHT), used as the internal standard. Cnicin, within the concentration range 1.06-6.12 mg/g, calculated per weight of the fresh plant material was detected in six species, the exception being C. salonitana. This method allows the rapid and simple quantification of cnicin without any pre-purification step.
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Skliar MI, Toribio MS, Oriani DS. Antimicrobial activity of Centaurea diffusa. Fitoterapia 2005; 76:737-9. [PMID: 16253434 DOI: 10.1016/j.fitote.2005.08.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2003] [Accepted: 08/24/2005] [Indexed: 11/22/2022]
Abstract
The methanol soluble fraction of the aqueous extract obtained from the dry heads of Centaurea diffusa demonstrated antimicrobial activity in twelve evaluated microorganisms.
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Affiliation(s)
- M I Skliar
- Cátedra de Farmacognosia, Departamento de Biología, Bioquimíca y Farmacia, Universidad Nacional del Sur, San Juan 670, (8000) Bahía Blanca, Argentina.
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