Browsing by Author "201-0010791"
Now showing items 1-20 of 37
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Analyses by GC-MS and GC-MS-MS of the hantzsch synthesis products using hydroxy- and methoxy-aromatic aldehydes
(PERGAMON-ELSEVIER SCIENCE, 2007-05-09)El mass spectra of products of the dihydropyridine Hantzsch synthesis using hydroxy and methoxy aldehydes as starting materials are reported. The reaction products (C-4 hydroxy- and methoxyphenyl-1,4-dihydropyridines and ... -
Antiferroelectricity in achiral mesogenic mixtures of organic materials
(ELSEVIER SCIENCE BV, 2000-05-12)To clarify the mechanism involved in the appearance of antiferroelectric properties in mixtures of polymers containing achiral mesogenic side chains and their monomers, X-ray investigation was carried out in pyroelectrically ... -
Caracterización Electroquímica y Reactividad con Radicales de 3,4 Dihidroxifenil, 3,5 Dihidroxifenil y C-4 Galato 1,4 Dihidropiridinas
(Universidad de ChilePrograma Cybertesis, 2007)En la presente memoria se reporta la caracterización electroquímica y la reactividad con radicales libres, alquilo y alquilperoxilo ABAP-derivados de tres nuevas 1,4 dihidropiridinas C4-substituidas (3,4,5-trihidroxifenil-DHP, ... -
Chromenopyridines: Promising scaffolds for medicinal and biological chemistry
(2011)Chromenopyridines constitute a structurally diverse class of compounds with a wide range of bioactivities and increasing presence in drugs. Here we analyze the scope of the synthetic methodology to access this nucleus with ... -
Electrochemical and EPR characterization of 1,4-dihydropyridines. Reactivity towards alkyl radicals
(TAYLOR & FRANCIS LTD, 2003)This work reports the electrochemical oxidation of a series of three synthesized 4-substituted-1,4-dihydropyridine derivatives in different electrolytic media. Also, an EPR characterization of intermediates and the reactivity ... -
Electrochemical and ESR characterization of free radicals from C-4 nitroso phenyl 1,4-dihydropyridines in aprotic media
(ELECTROCHEMICAL SOC, 2006)The present paper deals with the electrochemical and electron spin resonance (ESR) characterization of a number of nitroso phenyl 1,4-dihydropyridines in aprotic media on a hanging drop mercury electrode (HDME). The ... -
Electrochemical characterization of ortho and meta-nitrotoluene derivatives in different electrolytic media. Free radical formation
(PERGAMON-ELSEVIER SCIENCE, 2001-08-31)This paper reports a comprehensive study by tast polarography, d.p.p., and cyclic voltammetry on the electrochemical reduction in different electrolytic media of ortho- and meta-nitrotoluene derivatives. Controlled potential ... -
Electrochemical oxidation of C4-vanillin- and C4-isovanillin-1,4-dihydropyridines in aprotic medium: Reactivity towards free radicals
(ELSEVIER SCIENCE SA, 2008-10-01)This work reports the electrochemical oxidation of two new synthetic C4-vanillin and -isovanillin-1,4-dihydropyridines in aprotic medium. Its reactivity with alkylperoxyl radicals ABAP-derived at pH 7.4 is also studied. ... -
Electrochemical reduction of C-4 nitrosophenyl 1,4-dihydropyridines and their parent C-4 nitrophenyl derivatives in protic media
(ELSEVIER, 2005-06-15)A comprehensive study of the electrochemical reduction in protic media of parent C-4 nitrophenyl 1,4-DHPs and their corresponding nitrosophenyl 1,4-DHPs was carried out. The reduction potentials of synthesized aromatic ... -
Electrochemical reduction of nitroso compounds: voltammetric, UV-vis and EPR characterization of ortho- and meta-nitrosotoluene derivatives
(ELSEVIER SCIENCE, 2001-06-15)A comprehensive study of the electrochemical reduction, in different electrolytic media, of two nitroso compounds, i.e. ortho- and meta-nitrosotoluene derivatives has been carried out. Furthermore, UV-vis and EPR spectroscopic ... -
Electrochemical, UV-visible and EPR studies on nitrofurantoin: Nitro radical anion generation and its interaction with glutathione
(HARWOOD ACAD PUBL GMBH, 2000)This paper deals with the reactivity of the nitro radical anion electrochemically generated from nitrofurantoin with glutathione. Cyclic voltammetry (CV) and controlled potential electrolysis were used to generate the nitro ... -
Electrolytic oxidation of C4-nitrofuryl 1,4-dihydropyridines in nonaqueous medium
(ELECTROCHEMICAL SOC, 2007)A study of the electrolytic oxidation of three new C-4 nitrofuryl 1,4-dihydropyridines in nonaqueous aprotic medium is presented. Controlled-potential electrolysis (CPE) in dimethylformamide +0.1 M tetrabutyl-ammonium ... -
Estudio de la síntesis y caracterización electroquímica de 1-etoxicarbonil -2,4-dimetil-5-oxo-5H-cromeno[3,4-c]piridinas y dihidropiridinas- 9-substituídas
(Universidad de Chile, 2011)En la presente Memoria se hace un estudio sistemático sobre la síntesis de 9-metoxiy 9-nitro-cromenodihidropiridinas y cromenopiridinas substituídas, las cuales fueron posteriormente caracterizadas física y electroquímicamente. ... -
Investigations on new achiral polymeric liquid crystalline mixtures using a pyroelectric modulation technique
(GORDON BREACH SCI PUBL LTD, 2000)In this paper we report on the synthesis and characterization of new mixtures of achiral liquid crystalline side-chain polymers with their monomers. The samples have a basic structure similar to materials prepared earlier ... -
Nitrosobenzene: electrochemical, UV-visible and EPR spectroscopic studies on the nitrosobenzene free radical generation and its interaction with glutathione
(PERGAMON-ELSEVIER SCIENCE, 2000)This paper reports both the electrochemical characterization and the reactivity of the nitroso radical anion from nitrosobenzene with glutathione. The reduction of nitrosobenzene to the corresponding nitroso radical anion ... -
On the one pot syntheses of chromeno[4,3-b]pyridine-3-carboxylate and chromeno[3,4-c]pyridine-3-carboxylate and dihydropyridines
(Sociedade Brasileira de Química, 2010)Substituted chromenos, dihydropyridines and pyridines have been important in the syntheses of compounds having interesting pharmacological properties. Therefore, we found of interest to synthesize chromenopyridines and ... -
Oxidation of 4-(3-Indolyl)- and 4-(5-Indolyl)-1,4-dihydropyridines in Aprotic and Protic Media: Reactivity toward Alkylperoxyl Radicals
(ELECTROCHEMICAL SOC INC, 2008)Electrochemical oxidation of 4-(3-indolyl)- and 4-(5-indolyl)-1,4-dihydropyridines (DHPs) in aprotic and protic media is reported. Also, the reactivity of compounds toward alkylperoxyl radicals 2,2'-azobis-(2-amidinopropane) ... -
Oxidation of C4-hydroxyphenyl 1,4-dihydropyridines in dimethylsulfoxide and its reactivity towards alkylperoxyl radicals in aqueous medium
(PERGAMON-ELSEVIER SCIENCE, 2007-06-15)This work reports the electrochemical oxidation of three newly synthesized C4-hydroxyphenyl-substituted 1,4-dihydropyridine derivatives in dimethylsulfoxide. The reactivity of the compounds with ABAP-derived alkylperoxyl ... -
Phase characterization of two homologous series of LC methacrylic monomers based on omega-hexyl- and omega-butyl-oxysalicylaldimine groups with different alkoxy tail substitutions
(TAYLOR & FRANCIS LTD, 2003-01)The phase characterization of two homologous series of liquid crystalline methacrylic monomers based on omega-hexyl- and omega-butyloxysalicylaldimine groups, with different alkoxy tails, is presented. The liquid crystalline ... -
Phase characterization of two homologous series of LC methacrylic monomers based on ω-hexyl- and ω-butyl-oxysalicylaldimine groups with different alkoxy tail substitutions
(2003)The phase characterization of two homologous series of liquid crystalline methacrylic monomers based on ω-hexyl- and ω-butyloxysalicylaldimine groups, with different alkoxy tails, is presented. The liquid crystalline ...
