Browsing by Title Facultad de Ciencias Químicas y Farmacéuticas
Now showing items 3800-3819 of 4844
-
(1996)The azomethin ylide of the 2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one underwent 1,3-dipolar cycloaddition to both tautomers of the 1-nitroso-2-naphthol. The reaction yields two naphthoxazoles: 2-phenylnaphtho[1,2-d]oxazole, ...
-
(Universidad de Chile, 2023)Antecedentes: La farmacovigilancia (FV) es una actividad indispensable para conseguir terapias farmacológicas seguras y efectivas. Esta disciplina incluye el análisis de las notificaciones de reacciones adversas a medicamentos ...
-
(Sociedad Chilena de Química, 1989)Se estudió la reacción de condensación de di-2-piridilmatano con los compuestos carbonílicos: benzaldehido, 2, piridilcarboxaldehido, acetona y di-2-piridilcetona, catalizada por sales de los metales de la primera serie ...
-
(Sociedad Chilena de Química, 1996)El azometin-ilido de la 2-p-metoxifenil-4-fenil-2-oxazolin-5-ona reacciona por ciclo adición 1,3-dipolar con ambos tautómeros del 1-nitroso-2-naftol. La reacción forma dos naftoxazoles: 2-fenilnafto[1,2-d]oxazol,2-p-met ...
-
(KeAi Publishing Communications Ltd., 2019)Typically, a Lewis acid and a Lewis base can react with each other and form a classical Lewis adduct. The neutralization reaction can however be prevented by ligating the acid and base with bulky substituents and the ...
-
(HeteroCorporation, 2000)Several new 6-amino- and 6,8-diamino-4-aryl-2,3-dihydropyrimido[4,5- b][1,4]diazepines were obtained from the reaction of 4,5,6-triaminopyrimidine 1a and 2,4,5,6-tetraaminopyrimidine 1b with one equivalent of 3- ...
-
(HETERO CORPORATION, 2000-03)Several new 6-amino- and 6,8-dinmino-4-aryl-2,3-dihydropyrimido[4,5-b][1,4]diazepines were obtained from the reaction of 4,5,6-triaminopyrimidine 1a and 2,4,5,6-tetraaminopyrimidine 1b with one equivalent of 3-dimethylam ...
-
(HeteroCorporation, 1999)New 4-Aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-b]diazepines and 4- aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4,3-b]diazepines were obtained from the reaction of 4,5-diamino-3-methyl-1-phenylpyrazole 1 with one ...
-
(HETERO CORPORATION, 1999-05)New 4-Aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-b]diazepines and 4-aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4,3-b]diazepines were obtained from the reaction of 4,5-diamino-3-methyl-1-phenylpyrazole 1 with one ...
-
(SPRINGER/PLENUM PUBLISHERS, 2005-10)Purpose. The aims of the study are to analyze the interaction between 5-aminosalicylic acid (5-ASA) and peroxyl radicals and to evaluate the effect of some endogenous compounds such as ascorbic acid and amino acids on the ...
-
(ELSEVIER SCIENCE, 2005-10-31)Detection of O-2((1)Delta(g)) emission, lambda(max) = 1270 nm, following laser excitation and steady-state methods were employed to measure the total reaction rate constant, k(T), and the reactive reaction rate constant, ...
-
(2005)Detection of O2(1Δg) emission, λmax = 1270 nm, following laser excitation and steady-state methods were employed to measure the total reaction rate constant, kT, and the reactive reaction rate constant, kR, for the reaction ...
-
(1978)Kinetic studies of the [Co(phen)3] (ClO4)3 2H2O nitromethane pyridine reaction were made spectrophotometrically, by recording the appearance of a new absorption band at 474 nm. The reaction is first order with respect to ...
-
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-12-01)Cells have developed compensatory mechanisms to restore cell volume, and the ability to resist osmotic swelling or shrinkage parallels their resistance to necrosis or apoptosis. There are several mechanisms by which cells ...
-
(Universidad de Chile, 2020)En este trabajo se midió la reactividad de los flavonoides quercetina, morina, 3–hidroxiflavona, luteolina y catequina frente a O2(1Δg), en presencia de los iones metálicos Ca+2, Cu+2, Zn+2 y Fe+2, en medio homogéneo y ...
-
(Universidad de Chile, 2017)En este trabajo se midió y evaluó la reactividad de los flavonoides Morina y Quercetina frente a oxígeno molecular singulete, en presencia de los iones metálicos Ca+2 y Cu+2, mediante determinaciones de las constantes de ...
-
(Pergamon-Elsevier Science, 2020)Following previous studies where the metal-centered redox potentials of MN4 complexes are proposed as a reactivity descriptor for different electrochemical reactions, in the present work we expand this idea to a series of ...
-
(AMER CHEMICAL SOC, 2003-02)A series of C4-substituted 1,4-dihydropyridines (DHP) with either secondary or tertiary nitrogen in the dihydropyridine ring were synthesized. All of these compounds together with some commercial DHP derivatives were tested ...
-
(KLUWER ACADEMIC/PLENUM PUBL, 2004-10)Purpose. To study the reactivity of C4-substituted 1,4-dihydropyridines (1,4-DHP), with either secondary or tertiary nitrogen in the dihydropyridine ring, toward SIN-1-derived peroxynitrite in aqueous media at pH 7.4. Methods. ...
-
(Elsevier, 2012)Volatile species with thiol functions are important contributors to the flavour of a wide variety of wine types. However, in spite of their importance, their fate during winemaking has not been fully elucidated. In this ...