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da Hora Machado AE, Ferreira de Paula L, de Oliveira-Campos AMF, de Jesus Gomes A, de Paula R, Barbosa Neto NM. Spectroscopic properties and singlet oxygen production by the compound ethyl 3,12-dioxopyran[3,2-a]xanthone-2-carboxylate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 115:610-616. [PMID: 23872020 DOI: 10.1016/j.saa.2013.06.087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 06/18/2013] [Accepted: 06/24/2013] [Indexed: 06/02/2023]
Abstract
The steady state and time resolved experiments together with absorption and emission spectroscopies and quantum chemical calculations have been employed to investigate spectroscopic properties of a xanthone-type compound (ethyl 3,12-dioxopyran[3,2-a]xanthone-2-carboxylate). The spectroscopic data show good agreement with results obtained from quantum chemical calculations. Additionally, this compound shows expressive quantum efficiency for triplet population and a quantum efficiency of singlet oxygen generation very close to unity. Correlations between the nature of singlet and triplet excited states and spectroscopic properties were performed in order to understand the high quantum efficiency of singlet oxygen generation by this compound.
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Affiliation(s)
- Antonio Eduardo da Hora Machado
- Universidade Federal de Uberlândia, Instituto de Química, Laboratório de Fotoquímica e Ciência de Materiais, P.O. Box 593, CEP 38400-902, Uberlândia, Minas Gerais, Brazil.
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Francisco CS, Rodrigues LR, Cerqueira NMFSA, Oliveira-Campos AMF, Rodrigues LM. Synthesis of novel benzofurocoumarin analogues and their anti-proliferative effect on human cancer cell lines. Eur J Med Chem 2011; 47:370-6. [PMID: 22119152 DOI: 10.1016/j.ejmech.2011.11.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 10/28/2011] [Accepted: 11/02/2011] [Indexed: 02/04/2023]
Abstract
The synthesis of five new tetracyclic benzofurocoumarin (benzopsoralen) analogues is described. Their inhibitory effects on the growth of three human tumor cell lines (MDA MB 231 (breast adenocarcinoma), HeLa (cervix adenocarcinoma) and TCC-SUP (bladder transitional cell carcinoma) were evaluated, and discussed in terms of structure-activity relationship.
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Affiliation(s)
- Carla S Francisco
- Chemistry Centre, School of Sciences, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Dalla Via L, Di Noto V, Gia O, Marciani Magno S. Photoaddition of thienocoumarin derivatives to DNA: stoichiometry and kinetics of binding. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2005; 79:59-65. [PMID: 15792880 DOI: 10.1016/j.jphotobiol.2004.11.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2004] [Revised: 10/05/2004] [Accepted: 11/30/2004] [Indexed: 11/26/2022]
Abstract
Photoreaction of the 6,9-dimethyl-4-methoxymethyl-2H-thieno[3,2-g]-1-benzopyran-2-one (compound I) and 4-acetoxymethyl-6,9-dimethyl-2H-thieno[3,2-g]-1-benzopyran-2-one (compound II) to DNA was studied. The quantitative evaluation of the photobound molecules was performed by means of inductively coupled plasma atomic emission spectrometry (ICP-AES), exploiting the presence of the sulphur atom inside the tricyclic chromophore. The concurrent estimation of the phosphorus atom, present exclusively in the macromolecule, allowed possible intercalation sites to be identified and their involvement in the photoaddition reaction to be determined. The development of a kinetic model made it possible to discriminate and evaluate the single kinetic events that constitute the overall photoaddition process of I and II to DNA.
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Affiliation(s)
- Lisa Dalla Via
- Department of Pharmaceutical Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy.
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Di Noto V, Via LD, Gia O, Onori AM, Cellai L, Magno SM. Furocoumarin−Oligonucleotide Interaction: Kinetics, Selectivity, and Mechanism of the Furocoumarin Photoaddition Reaction to Oligonucleotide Intercalation Sites. J Phys Chem B 2000. [DOI: 10.1021/jp994083l] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vito Di Noto
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, University of Padua, Via Loredan, 4, 35131, Padova, Italy, Dipartimento di Scienze Farmaceutiche, University of Padua, Via Marzolo, 5, 35131, Padova, Italy, and Istituto di Strutturistica Chimica CNR, CP10, I-00016, Monterotondo Stazione, Roma, Italy
| | - Lisa Dalla Via
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, University of Padua, Via Loredan, 4, 35131, Padova, Italy, Dipartimento di Scienze Farmaceutiche, University of Padua, Via Marzolo, 5, 35131, Padova, Italy, and Istituto di Strutturistica Chimica CNR, CP10, I-00016, Monterotondo Stazione, Roma, Italy
| | - Ornella Gia
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, University of Padua, Via Loredan, 4, 35131, Padova, Italy, Dipartimento di Scienze Farmaceutiche, University of Padua, Via Marzolo, 5, 35131, Padova, Italy, and Istituto di Strutturistica Chimica CNR, CP10, I-00016, Monterotondo Stazione, Roma, Italy
| | - Alberto Mochi Onori
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, University of Padua, Via Loredan, 4, 35131, Padova, Italy, Dipartimento di Scienze Farmaceutiche, University of Padua, Via Marzolo, 5, 35131, Padova, Italy, and Istituto di Strutturistica Chimica CNR, CP10, I-00016, Monterotondo Stazione, Roma, Italy
| | - Luciano Cellai
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, University of Padua, Via Loredan, 4, 35131, Padova, Italy, Dipartimento di Scienze Farmaceutiche, University of Padua, Via Marzolo, 5, 35131, Padova, Italy, and Istituto di Strutturistica Chimica CNR, CP10, I-00016, Monterotondo Stazione, Roma, Italy
| | - Sebastiano Marciani Magno
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, University of Padua, Via Loredan, 4, 35131, Padova, Italy, Dipartimento di Scienze Farmaceutiche, University of Padua, Via Marzolo, 5, 35131, Padova, Italy, and Istituto di Strutturistica Chimica CNR, CP10, I-00016, Monterotondo Stazione, Roma, Italy
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