Browsing by Author "XX577369"
Now showing items 1-20 of 29
-
Jullian Matthaei, Carolina; Morales Montecinos, Javier; Zapata Torres, Gerald Amilcar; Aguilera, Benjamín; Rodríguez Borges, Jorge; Arán, Vicente J.; Olea Azar, Claudio (PERGAMON-ELSEVIER SCIENCE LTD, 2008-05-01)The slightly water-soluble 5-nitroindazole derivative (5-NI) and its inclusion with either beta-cyclodextrin (beta CD) or Heptakis (2,6-di-O-methyl)-beta- cyclodextrin (DM beta CD) were investigated. The stoichiometric ...
-
Araya Maturana, Ramiro; Cardona, Wilson; Delgado Castro, Tomás; Jullian Matthaei, Carolina (JOHN WILEY & SONS LTD, 2000-02)The H-1 and C-13 NMR spectra of a set of structurally related tricyclic quinones consisting of 4,4-dimethylanthracene-1,9,10(4H)-trione (1), 4,4,6,7-tetramethylanthracene-1,9,10(4H)-trione (2) and the regioisomers 4,4,5- ...
-
Araya Maturana, Ramiro; Cassels Niven, Bruce; Delgado Castro, Tomás; Hurtado Guzmán, Claudio; Jullian Matthaei, Carolina (JOHN WILEY & SONS LTD, 1999-04)The regiosomeric quinones 5-acetyloxymethyl-4,4,8-trimethyl- (5) and 8-acetyloxymethyl-4,4,5-trimethylanthracene-1,9,10(4H)-trione (6) were synthesized and their regiochemistry was assigned on the basis of the unambiguous ...
-
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 ...
-
Jullian Matthaei, Carolina; Orosteguis, Teresita; Pérez Cruz, Fernanda; Sánchez, Paulina; Mendizábal Emaldía, Fernando; Olea Azar, Claudio (PERGAMON-ELSEVIER SCIENCE LTD, 2008-11-01)Properties of inclusion complexes between morin (M) and beta-cyclodextrin (beta CD), 2-hydroxypropyl-beta-cyclodextrin (HP beta CD) and Heptakis (2,6-O-di methyl) beta-cycloclextrin (DM beta CD) such as aqueous solubility ...
-
Jullian Matthaei, Carolina; Moyano, L.; Yáñez Soto, Claudia; Olea Azar, Claudio (PERGAMON-ELSEVIER SCIENCE LTD, 2007-05)The slightly water-soluble flavonoid quercetin (QUE) and its inclusion with either beta-cyclodextrin (beta CD), hydroxypropyl-beta-cyclodextrin (HP-beta CD) or sulfobutyl ether-beta-cyclodextrin (SBE-beta CD) were investigated. ...
-
Weiss López, Boris; Jullian Matthaei, Carolina; Saitz Barría, Claudio; Pessoa Mahana, Hernán; Valderrama, J.; Araya Maturana, Ramiro (SOCIEDAD CHILENA DE QUIMICA, 2001-09)Activation parameters for the rotation around the methylene-nitrogen single bond found in a series of four 2,2'-disubstituted N-acetyl-N-phenylbenzylamines, dissolved in DMSO-d(6), were measured employing the temperature ...
-
Jullian Matthaei, Carolina; Brossard, Victor; González, Iván; Alfaro, Muriel; Olea Azar, Claudio (SPRINGER/PLENUM PUBLISHERS, 2011-04)The slightly water-soluble flavonoid kaempferol (KAE) and its inclusion complexes with beta-cyclodextrin (beta CD), hydroxypropyl-beta-cyclodextrin (HP beta CD) or heptakis-2,6-O-dimethyl-beta-cyclodextrin (DM beta CD) ...
-
Jullian Matthaei, Carolina; Fernández Sandoval, Samuel; Rojas Aranguiz, Max; Gómez Machuca, Horacio Exequiel; Salgado-Figueroa, Paola; Celis-Barros, Cristián; Zapata-Torres, Gerald; Adam, Rosa; Abarca, Belén (Elsevier, 2014)A new supramolecular sensitizer for nickel(II) ion in aqueous solution based on a pyridyltriazolopyridine-cyclodextrin inclusion complex is proposed. The inclusion complexation behavior, characterization andbinding ability ...
-
Olea Azar, Claudio; Abarca, B.; Norambuena, Ester; Opazo, L.; Jullian Matthaei, Carolina; Valencia, S.; Ballesteros, R.; Chadlaoui, M. (Elsevier B.V., 2008-11)The electron spin resonance (ESR) spectra of free radicals obtained by electrolytic reduction of triazolopyridyl pyridyl ketones and dipyridyl ketones derivatives were measured in dimethylsulfoxide (DMSO). The hyperfine ...
-
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 ...
-
Speisky Cosoy, Hernán; Gómez, Maritza; Burgos Bravo, Francesca; López Alarcón, Camilo; Jullian Matthaei, Carolina; Olea Azar, Claudio; Aliaga, Margarita E. (PERGAMON-ELSEVIER SCIENCE LTD, 2009-03-01)The interaction between Cu2+ ions and GSH molecules leads to the swift formation of the physiologically occurring Cu(I)-[GSH](2) complex. Recently, we reported that this complex is able to reduce molecular oxygen into ...
-
Jullian Matthaei, Carolina; Alfaro, Muriel; Zapata Torres, Gerald Amilcar; Olea Azar, Claudio (SPRINGER/PLENUM PUBLISHERS, 2010-10)The formation of the complexes of galangin (GAL) with native β-cyclodextrin (βCD), and with its substituted counterparts such as dimethyl-βCD (DMβCD) and hydroxypropyl-βCD (HPβCD), was studied by fluorescence spectra in ...
-
Gómez Machuca, Horacio; Quiroga Campano, Cinthia; Zapata Torres, Gerald; Jullian Matthaei, Carolina (American Chemical Society, 2020)The interaction mechanism between a scarcely soluble copper(II) complex of Cu(II)-6-hydroxychromone-3carbaldehyde-(3'-hydroxy)benzoylhydrazone( CuCHz) in aqueous solution and its DM beta CD complex was studied in the ...
-
Sobarzo Sánchez, Eduardo; Saitz Barría, Claudio; Jullian Matthaei, Carolina; Cassels Niven, Bruce (MARCEL DEKKER INC, 2002)The abundant aporphine alkaloid (S)-(+)-boldine (1) was selectively nitrosated with sodium nitrite in acetic acid affording 8-nitrosoboldine (2) which was hydrogenated catalytically to give 8-aminoboldine (3). The latter ...
-
Sobarzo Sánchez, Eduardo; Cassels Niven, Bruce; Saitz Barría, Claudio; Jullian Matthaei, Carolina (JOHN WILEY & SONS LTD, 2001-06)The novel heterocycles 1,11-dimethoxy-2-hydroxy-6-methyloxazolo[4,5-k]-5,6,6a,7-tetrahydro-4H-dibenzo [de,g]quinoline, 1,12-dimethoxy-2-hydroxy-6-methyl-9-phenyl-10H-oxazin[5,6-k]-5,6,6a,7-tetrahydro-4H-dibenzo ...
-
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. ...
-
Fuente, J. de la; Neira Pacheco, Verónica Alejandra; Saitz Barría, Claudio; Jullian Matthaei, Carolina; Sobarzo Sánchez, Eduardo (AMER CHEMICAL SOC, 2005-07-07)Photoreduction by amines of oxoisoaporphine dyes occurs via a stepwise mechanism of electron-proton electron transfer that leads to the metastable N-hydrogen oxoisoaporphine anion. During photoreduction that occurs from ...
-
Fuente, J. de la; Jullian Matthaei, Carolina; Saitz Barría, Claudio; Sobarzo Sánchez, Eduardo; Neira Pacheco, Verónica Alejandra; González, C.; López, R.; Pessoa Mahana, Hernán (ROYAL SOC CHEMISTRY, 2004)Photoreduction of 5,6-dimethoxy-, 5-methoxy- and 2,3-dihydro-7H-dibenzo[de, h] quinolin-7-one (A) by tertiary amines in oxygen-free solutions generates long-lived semi-reduced metastable photoproducts, A - NH-, via a ...
-
Insuasty, B.; Saitz Barría, Claudio; Insuasty, H.; Quiroga, J.; Jullian Matthaei, Carolina (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 ...