Browsing by Author "Cañete Molina, Alvaro Félix"
Now showing items 1-7 of 7
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Márquez, Amelia; Saitz Barría, Claudio; Cañete Molina, Alvaro Félix; Rodríguez Bustos, Héctor; Jullian Matthaei, Carolina (JOHN WILEY & SONS LTD, 1998-06)The H-1 and C-13 NMR spectra of 2-phenyl-3H-naphtho[2,1-b][1,4]oxazin-3-one, 2-p-methoxyphenylnaphtho[1,2-d]oxazole and 2-phenylnaphtho[1,2-d]oxazole were totally assigned using a combination of one-and two-dimensional NMR ...
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Rocco, Gabriela; Toledo, Carla; Ahumada Torres, Aída Inés de Lourdes; Sepúlveda, Betsabet; Cañete Molina, Alvaro Félix; Richter Duk, Pablo (ELSEVIER SCIENCE BV, 2008-06-06)An efficient continuous pressurized solvent extraction (PSE) method assisted by ultrasound energy was developed for the extraction of polychlorinated biphenyls (PCBs) from biosolids. Analytes were determined in the extracts ...
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Fuente, J. de la; Cañete Molina, Alvaro Félix; Zanocco Loyola, Antonio; Saitz Barría, Claudio; Jullian Matthaei, Carolina (AMER CHEMICAL SOC, 2000-11-17)The photophysical and photochemical behavior of 1-methyl-3-phenylquinoxalin-2-one (MeNQ) and 3-phenylquinoxalin-2-one (HNQ) in the presence of amines is reported. While HNQ fluorescence shows an auxochromic effect and a ...
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Zanocco Loyola, Antonio; Cañete Molina, Alvaro Félix; Meléndez, M. X. (SOCIEDAD CHILENA DE QUIMICA, 2000-03)The reaction between 2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one and 2,2,6,6-tetramethyl-1-piperidinyl-N-oxide (TEMPO) in benzene as the solvent generates quantitatively 4,4'-bis-[2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one]. ...
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Fuente, J. de la; Cañete Molina, Alvaro Félix; Saitz Barría, Claudio; Jullian Matthaei, Carolina (AMER CHEMICAL SOC, 2002-08-08)Photoreduction of 3-phenylquinoxalin-2-ones, XNQ, by triethylamine, TEA, gives a metastable semireduced quinoxalin-2-one via an electron-proton-electron transfer, with unit quantum yields at high amine concentrations. ...
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Saitz Barría, Claudio; Cañete Molina, Alvaro Félix; Márquez, Amelia; Muñoz, Lucía; Rodríguez Bustos, Héctor (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 ...
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Cañete Molina, Alvaro Félix; Meléndrez Cancino, Mónica Ximena; Saitz Barría, Claudio; Zanocco Loyola, Antonio (MARCEL DEKKER INC, 2001)A very simple and efficient method to prepare aminonaphthalene derivatives in good yield using the Bucherer reaction under microwave irradiation in a closed vessel is described. A reaction time of 30 min at 150 Watts of ...