Browsing by Author "Weiss López, Boris"
Now showing items 1-11 of 11
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Heredia Moya, Jorge; Krohn, Karsten; Florke, Ulrich; Pessoa Mahana, Hernán; Weiss López, Boris; Estévez, A.; Araya Maturana, Ramiro (PERGAMON-ELSEVIER SCIENCE LTD, 2007-06-01)E)-Ethyl 3-(4-oxo-4H-chromen-3-yi)acrylate (3), (E)-3-(4-oxo-4H-chromen-3-yl)-2-propenenitrile (12) and their 5-hydroxy-derivatives 11 and 13 undergo alternative, solvent dependent, domino reactions with ethyl vinyl ether. ...
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Martínez Cifuentes, Maximiliano; Weiss López, Boris; Santos, Leonardo S.; Araya Maturana, Ramiro (Bentham Science Publishers B.V., 2015)© 2015, Bentham Science Publishers. Curcumin, a natural yellow polyphenol, is isolated from the herb Curcuma longa L. (turmeric), a member of the ginger family. It has been extensively studied due to their multiple ...
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Martínez Cifuentes, Maximiliano; Weiss López, Boris; Santos, Leonardo S.; Araya Maturana, Ramiro (MDPI, 2014)Intramolecular hydrogen bonds (IHBs) play a central role in the molecular structure, chemical reactivity and interactions of biologically active molecules. Here, we study the IHBs of seven related o-carbonyl hydroquinones ...
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Bahamonde-Padilla, Víctor; Martínez Cifuentes, Maximiliano; Muñoz-Masson, Daniel; Ruiz, Álvaro; Ahumada, Hernán; Araya Maturana, Ramiro; Soto Delgado, Jorge; Weiss López, Boris (Sociedad Chilena de Quimica, 2012)4,4-Dimethyl-5,8-dihydroanthracene-1,9,10(4H)-trione (Q1) and 9,10-Dihydroxy-4,4-dimethyl-5,8-dihydro-1 (4H)-anthracenone (Q2), two molecules that inhibit cancer cell respiration, were selectively deuterated and dissolved ...
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Ahumada, H.; Montecinos, R.; Tieleman, D. P.; Weiss López, Boris (2005)The distribution, orientation, and dynamics of benzyl alcohol and benzyl ethers dissolved in nematic lyotropic liquid crystals were analyzed using nuclear magnetic resonance (NMR) and molecular simulations. The molecules ...
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Weiss López, Boris; Bravo, Héctor R. (1994)AM1 full geometry optimization of seven substituted cyclic hydroxamic acids (Hx) was performed. A qualitative correlation between Elumo vs Hammett's σP was observed. The reactivity of these 7-substituted Hx with hard ...
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Garrido, C.; Weiss López, Boris; Campos Vallette, Marcelo (Taylor and Francis Inc., 2016)A modification to the traditional synthesis of reduced silver metal nanoparticles with hydroxylamine hydrochloride is proposed. The new colloid, obtained by decreasing the concentration of hydroxide and chloride ions, is ...
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Martínez Cifuentes, Maximiliano; Weiss López, Boris; Araya Maturana, Ramiro (Hindawi Limited, 2017)© 2017 Maximiliano Martínez-Cifuentes et al. The mandatory presence of a chlorine atom on the aromatic ring of 6-hydroxy-3-formyl angular chromones, on the respiration inhibition of mammary carcinoma mouse, is explained ...
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Rosenbluth,; Weiss López, Boris; Olea, (American Society for Photobiology, 1997)The kinetics of fluorescence quenching of pyrene and three of its derivatives by a series of n-alkylpyridinium ions has been studied. The quenching process is diffusion controlled for all the systems studied, independent ...
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Araya Maturana, Ramiro; Delgado Castro, Tomás; Cardona,; Weiss López, Boris (2001)The structural elucidation of complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment is probably the most useful 2D NMR method. The ...
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Clavijo Campos, Ernesto; Weiss López, Boris; Rivera, L. Patricio (1996)FT-IR and FT-Raman spectra of Caulerpin, a green algae pigment, have been recorded. An assignment of the observed bands is proposed on the basis of previously reported vibrational spectra of similar structures. Intensity ...