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Now showing items 1-20 of 63475
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(1 alpha, 12 alpha)-Ethyl 15-ethoxy-4-hydroxy-2-oxo-9-oxatetracyclo[10.2.2.0(1,10).0(3,8)]hexadeca-4,6,8,13-tetraene-13-carboxylate
(BLACKWELL PUBLISHING, 2006-09)(E)-Ethyl 3-(4-oxo-4H-chromen-3-yl)acrylate reacts in a Domino reaction with ethyl vinyl ether via intermediates to give the title bridged compound, C20H22O6, and by-products. The conformation of the carboxylate group in ... -
1 alpha,5 alpha-dihydroxymanoyl oxide, a novel diterpene from Satureja gilliesii
(MUNKSGAARD INT PUBL LTD., 1997-05-15)The structure of the title diterpene, C20H34O3 (8 alpha,13R-epoxylabd-14-ene-1 alpha,5 alpha-diol), exhibits a very uncommon oxidation pattern, with two axially disposed hydroxyl substituents at C1 and C5, and five tertiary ... -
+ 1 M Más 1 Media propuesta comunicacional para sitio web con contenidos generados por usuarios consumidores de los nuevos medios online de comunicación
(Universidad de Chile, 2011)En la actualidad, los medios se han expandido de forma meteórica. No sólo los tenemos de forma convencional, si no que se han abierto a distintos formatos. Esto, por el mismo empuje de la sociedad, las necesidades de ... -
1,2,4-Triazine N-oxide derivatives: Studies as potential hypoxic cytotoxins. Part III
(WILEY-V C H VERLAG GMBH, 2004-05)New 5-(2-arylethenyl)-1,2,4-triazine N-oxide and N,N'-dioxide derivatives were synthesized in order to obtain compounds as selective hypoxic cell cytotoxins. The desired products were obtained when the 5-methyl heterocycle ... -
1,3-Dioxolane: A green solvent for the preparation of carbon nanotube-modified electrodes
(Elsevier Inc., 2014)© 2014 Elsevier B.V. One of the main challenges associated with the handling of carbon nanotubes (CNTs) for modifying electrodes is the production of adequate dispersions. We report the first example in which 1,3-dioxolane ... -
1,4-benzoxazin-3-one, 2-benzoxazolinone and gallic acid from Calceolaria thyrsiflora Graham and their antibacterial activity
(Verlag der Zeitschrift fur Naturforschung, 2005)Secondary metabolites, DIBOA, HBOA, 7-OH-HBOA, BOA and gallic acid, were isolated and quantified from Calceolaria thyrsiflora Graham, a native medicinal plant of Chile belonging to the Scrophulariaceae family. The highest ... -
1,4-Dihydropyridines: Reactivity of nitrosoaryl and nitroaryl derivatives with alkylperoxyl radicals and ABTS radical cation
(TAYLOR & FRANCIS, 2004-07)In the present paper, a direct quenching of radical species by a number of synthesized nitrosoaryl 1,4-dihydropyridines and their parent nitroaryl 1,4-dihydropyridines was determined in aqueous media at pH 7.4. These two ... -
( + )-1-(2,5-Dimethoxy+ethylthlophenyl )-2-aminopropane (ALEPH-2), a novel putative anxiolytic agent lacking affinity for benzodiazepine sites and serotonin-1A receptors
(Springer, 1996-05-28)Serotonergic behavioral responses, efTects on motor activity and core temperature, and binding properties of the novel putative anxiolytic amphe!amine derivative (± )1-(2,5-dimethoxy-4-ethylthlophenyl)- 2-aminopropane ... -
(±)-1-(2,5-dimethoxy-4-ethylthiophenyl)-2-aminopropane (ALEPH-2), a novel putative anxiolytic agent lacking affinity for benzodiazepine sites and serotonin-1A receptors
(Springer Verlag, 1996)Serotonergic behavioral responses, effects on motor activity and core temperature, and binding properties of the novel putative anxiolytic amphetamine derivative (±)1-(2,5-dimethoxy-4-ethylthiophenyl)-2-aminopropane ... -
[1-(Ethoxycarbonyl)-1-cyclopentyl]triphenylphosphonium Bromide, [(C6H5)3PC(C4H8)(COOC2H5)]Br
(1995)The crystal structure of the title phosphonium salt consists of a tetrahedral (C6Hs)P +C(C4HS)- (COOCH2CH3) cation and a Br- anion. The triphenylphosphonium group has P---C(phenyl) distances which are equal within ... -
1-benzoyl-2-(2-nitrophenyl)-1H-benzimidazole derivatives: A novel approach to the development of new HIV-1 reverse transcriptase inhibitors
(SOC CHILENA QUIMICA, 2007-12)A novel approach to the development of anew class of HIV-1 RT inhibitors is reported. The 1-benzoyl-2-aryl-1H-benzimidazole series was designed as a combination of two previously reported active scaffolds, the benzimidazole ... -
1-Benzyl-1,2,3,4-tetrahydroisoquinolines. 1H NMR conformational studies and rotational barriers
(2004)The conformational preferences of a series of 1-benzyl-1,2,3,4- tetrahydroisoquinolines (norlaudanosine and coclaurine analogues) were investigated with the aid of their 1H NMR spectra and NOESY experiments, coupled with ... -
1-benzyl-1,2,3,4-tetrahydroisoquinolines. H-1 NMR conformational studies and rotational barriers
(SOCIEDAD CHILENA DE QUIMICA, 2004-03)The conformational preferences of a series of 1-benzyl-1,2,3,4-tetrahydroisoquinolines (norlaudanosine and coclaurine analogues) were investigated with the aid of their H-1 NMR spectra and NOESY experiments, coupled with ... -
1-ethyl-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-2-methylindan-5-ol
(BLACKWELL PUBLISHING, 2006-05)Molecules in the title crystal structure, C20H24O4, are linked into chains of R-4(4)(8) rings along [010] and these chains are linked into sheets via weak C-H center dot center dot center dot pi(arene) interactions. These ... -
1.4 Research and the dental student
(2002)There has been significant concern that the dental curriculum and system of clinical education, in particular, is not designed to take advantage of the explosion in knowledge in biomedical science and its application to ... -
10 años de multifondos : desempeño de las Administradoras de Fondos de Pensiones en Chile
(Universidad de Chile, 2013-01)Este trabajo busca estudiar el valor agregado aportado por los analistas de las distintas AFP´s durante los primeros diez años de funcionamiento de los multifondos en Chile. Realizando una simulación de las inversiones de ... -
A 100 años de la rebelión de Angata: ¿resistencia religiosa o secular? Las complicidades tire1 y los múltiples sentidos de la revuelta de 1914 en Rapa Nui
(Univ Tarapacá, 2016)En este artículo proponemos una nueva lectura de lo que se ha denominado “La rebelión de Angata”, un hecho que se produce en 1914 y que marcará la relación entre los rapanui y el mundo tire (Chile). El eje de nuestro ... -
A 100 años del Parque José Domingo Gómez Rojas: su restauración o su muerte
(Universidad de Chile, 2007-06)Al cumplirse 100 años del Parque J.D.Gómez Rojas, se argumenta las razones para su restauración en la perspectiva del Bicentenario de la Independencia de Chile -
1000 años en Rapa Nui. Arqueología del asentamiento
(Editorial Universitaria S.A., 2006)
