Buscar
Itens para a visualização no momento 1-10 of 18
Síntese de novas azinas trifluormetil substituídas e derivados a partir de reações de heterociclização de trifluoracetil enol éteres com diamino arenos
(Universidade Federal de Santa Maria, 2013-12-13)
The present research describes the study of synthetic strategies for obtaining of polyheterocyclic systems trifluoromethyl substituted from simple precursors: 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones (1), of formula ...
Estudo comparativo da bioatividade de compostos fenólicos em plantas medicinais
(Universidade Federal de Santa Maria, 2013-09-25)
Phenolic compounds are secondary metabolites, widely distributed in the plant
kingdom, which present antiinflamatory, antibacterial, antiviral, antialergical and
antitumoral activities, in addition to antioxidant activities. ...
Síntese de Seleno-Isoxazóis e Seleno-Indóis via Reações de Ciclização Intramolecular mediadas por Cloreto Férrico
(Universidade Federal de Santa Maria, 2013-03-05)
This work reports the synthesis of a series of 4-organoselenyl-isoxazoles (19 examples), prepared via FeCl3/diorganyl diselenides-promoted intramolecular cyclization of alkynone O-metyloximas. In general, the selenyl-isoxazoles ...
Síntese de Calcogenofenos e Isoquinolinas via Reações de Ciclização Intramolecular
(Universidade Federal de Santa Maria, 2013-11-26)
In the first part of this work, a series of selenophenes and tellurophenes were prepared starting from of (Z)-chalcogenoenynes, by employing FeCl3 diorganyl dichalcogenide-mediated intramolecular cyclization. In general, ...
Desenvolvimento de método para a determinação simultânea de resíduos de agrotóxicos e medicamentos veterinários em solo por UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2013-08-30)
Typically, soil is the final destination of pesticides applied in agriculture and of veterinary drugs employed in animal production. The global concern about the possible consequences of the increased use of these compounds ...
Antibióticos macrolídeos: determinação e identificação de metabólitos e subprodutos de degradação em efluente hospitalar
(Universidade Federal de Santa Maria, 2013-08-09)
Macrolide antibiotics are an important group of prescription drugs; as a consequence of the large and continuous use, they are commonly found in the environment.
In the present study, it was developed and optimized a ...
Obtenção de novos heterociclos derivados do ácido levulínico
(Universidade Federal de Santa Maria, 2013-09-30)
This study describes the attainment of twenty three (23) bis-heterocycles derived from the Levulinic Acid: Bis-Pyrazoles (6a-k) by the reaction of cyclecondensation between the 3-(5-(trifluoromethyl)-4,5-dihydro-1H-pyraz ...
Síntese de Penta-2,4-dienonitrilas e 2-Cianometileno-but-3-enoatos de Etila via Olefinação de Horner-Wadsworth-Emmons e sua Aplicação na Obtenção de 4-Trifluormetil-piridin-2(1H)-iminas Substituídas e 2H-Piran-2-onas Análogas .
(Universidade Federal de Santa Maria, 2013-03-26)
This paper presents the Horner-Wadsworth-Emmons olefination applied
to preparing 22 new 5-alkoxy-3-trifluoromethyl-penta-2,4-dienenitriles (5), 5-
phenylthio-3-trifluoromethyl-penta-2,4-dienenitriles (6) and ethyl ...
Contaminantes metálicos em contrastes a base de quelatos de gadolínio e reações de transmetalação
(Universidade Federal de Santa Maria, 2013-10-18)
Gadolinium (Gd) is the basis of contrast media most used in magnetic resonance imaging (MRI). Because it is a very toxic metal ion, all Gd-based contrast media present chelating agents in their composition. Gd-based ...
Mono-, bis- e tris-triazenos, tetrazeno e complexos de Cu(I), Ag(I), Au(I), Cu(II), Ni(II), Pd(II) E Cu(III): síntese, caracterização, estrutura cristalina, atividades antitumoral, antibacteriana e de clivagem do DNA in vitro
(Universidade Federal de Santa Maria, 2013-01-31)
Multi-nitrogenated ligands are versatile coordinating ligands to the transition metals. In this
work, mono- and bis-triazenes, a tris-triazene, a tetrazenide and twelve metal complexes were
synthesized, including the ...