Persona: Sanz del Castillo, Dionisia
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Publicación Curcumin Related 1,4-Diazepines: Regioselective Synthesis, Structure Analysis, Tautomerism, NMR Spectroscopy, X-ray Crystallography, Density Functional Theory and GIAO Calculations(Wiley, 2017-05-02) Andrade, Ana; Claramunt, Rosa María; Torralba, M. Carmen; Torres, M. Rosario; Alkorta, Ibon; Elguero, J.; Nieto Gómez, Carla Isabel; Sanz del Castillo, DionisiaThe reaction of 1,2-ethylenediamine with seven fluorinated β-diketones affords two different 1,4-diazepine series depending on the experimental conditions. Their structures as well as tautomerism have been established by 1H, 13C, 15N and 19F nuclear magnetic resonance in solution supported by density functional theory calculations at the B3LYP/6-311++G(d,p) level. The two compounds obtained from (E)-5-(2-fluoro-4-hydroxyphenyl)-1-phenylpent-4-ene-1,3-dione were analyzed by X-ray crystallography and studied by solid-state NMR.Publicación A multinuclear magnetic resonance study of fluoro derivatives of hydroxybenzaldehydes(2015-06-06) Claramunt, Rosa María; Alkorta, Ibon; Elguero, J.; Sanz del Castillo, Dionisia; Nieto Gómez, Carla IsabelPublicación Molecular structure in the solid state by X-ray crystallography and SSNMR and in solution by NMR of two 1,4-diazepines(Elsevier, 2017-10-23) Nieto Gómez, Carla Isabel; Sanz del Castillo, Dionisia; Claramunt, Rosa María; Torralba, María Carmen; Torres, M. Rosario; Alkorta, Ibon; Elguero, JoséThe crystals of two 1,4-diazepines prepared from curcuminoid β-diketones and ethylenediamine were studied by X-ray crystallography and NMR. Their tautomerism, intramolecular hydrogen bonds and conformation were determinedPublicación Evaluation of the antioxidant and neuroprotectant activities of new asymmetrical 1,3-diketones(MDPI, 2018-07-24) Nieto Gómez, Carla Isabel; Comago, María del Pilar; Cabildo, María del Pilar; Sanz del Castillo, Dionisia; Claramunt, Rosa María; Torralba, María Carmen; Torres, María Rosario; Martínez Casanova, Diana; Sánchez Alegre, Yaiza Rebeca; Escudero, Esther; Lavandera, José LuisA series of fourteen new asymmetrical 1,3-diketone derivatives have been synthesized and evaluated in the ABTS, FRAP and DPPH assays as a new chemotype with antioxidant and drug-like properties. All the compounds displayed low cytotoxicity in comparison to curcumin against the human neuroblastoma SH-SY5Y cell line. Among them, (3Z,5E)-6-(2,5-difluoro-4-hydroxy-phenyl)-1,1,1-trifluoro-4-hydroxyhexa-3,5-dien-2-one (6b) and (3Z,5E)-6-(2,3-difluoro-4-hydroxy-phenyl)-1,1,1-trifluoro-4-hydroxyhexa-3,5-dien-2-one (7b) with excellent solubility and chemical stability in biorelevant media, have also shown a similar Fe+2 chelation behavior to that of curcumin. Additionally, both derivatives 6b and 7b have afforded good neuroprotection activity against H2O2 induced oxidative stress in the same neuronal cell line, with a significant reduction of intracellular ROS levels, in parallel with a good recovery of the Mitochondrial Membrane Potential (ΔΨm). Compounds 6b and 7b with a promising antioxidant and drug-like profile, with low cytotoxic and good neuroprotectant activity, constitute a new interesting chemical class with high potential as new therapeutic agents against neurodegenerative diseases.