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Estudo fitoquímico e da atividade biológica de Zanthoxylum rhoifolium
(Universidade Federal de Santa Maria, 2005-08-12)
Four previously known dihydrobenzophenanthridine alkaloids,
Dihydrochelerythrine (39), Bocconoline (42), Chelerythrine (2) and 6- Acetonyldihydrochelerythrine (33), were isolated from the stem bark of Zanthoxylum rhoifolium, ...
Síntese de (5-trifluormetil-1H-pirazol-1-IL)(quinolin-4-IL)metanonas de interesse farmacológico
(Universidade Federal de Santa Maria, 2016-07-22)
A convergent synthesis of a series of 16 new polysubstituted (5-hydroxy-5-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-1-yl)(quinolin-4-yl)methanones, starting from isatin and alky(aryl/heteroaryl) ketones, is described. The ...
N-alquilação regiosseletiva de pirazóis empregando 4-alcóxi(amino)-5-bromo-1,1,1-trifluorpent-3-en-2-onas
(Universidade Federal de Santa Maria, 2016-08-19)
This work presents the synthesis of three new series of nitrogen-heterocycles containing the substituent trifluoromethyl, exploiting the synthetic versatility and regioselectivity of 4-alkoxy-5-bromo-1,1,1-trifluorpent-3-en-2-ones ...
Uso de K-10 e irradiação de microondas no estudo da metodologia de transesterificação e na síntese de β-enamino ésteres
(Universidade Federal de Santa Maria, 2005-05-20)
Due to the high chemical versatility of β-keto esters and the β-enamino carbonylic compounds as synthetic precursors, our research group has investigated and developed methodologies for their synthesis and reactivity. In ...
Estudo da casca da raiz da espécie Maytenus ilicifolia Mart. ex Reissek, modificações estruturais do composto β-sitosterol e análises das atividades antimicrobianas
(Universidade Federal de Santa Maria, 2016-08-05)
This dissertation describes the phytochemical study of Maytenus ilicifolia Mart species. ex Reissek belonging to Celastreceae family. Further, structural modification reactions were performed in β-sitosterol compound, in ...
Validação analítica para determinação de clorpirifós e avaliação da eficiência do sistema biobed Brasil
(Universidade Federal de Santa Maria, 2016-05-13)
The storage and handling points of agricultural sprayers on farms are a contamination point source of punctual contamination in case of accidental spills of concentrated pesticide and / or leaks, among others. In order to ...
Síntese e caracterização estrutural de polialetos e compostos zwitteriônicos derivados de diteluretos de diarila
(Universidade Federal de Santa Maria, 2016-06-22)
The present work describes the synthesis and structural elucidation of ten new tellurium halide starting from diaryl ditellurides (aryl group = 2-piridine or N,N-dimethylbenzilamine). The compounds and starting material ...
Investigação de componentes químicos da casca do caule de Luehea divaricata martius (malvaceae) e suas potenciais atividades biológicas
(Universidade Federal de Santa Maria, 2016-06-24)
Luehea divaricata, known as açoita-cavalo , is a Brazilian native species and has few reported in the literature. Phytochemical investigation of the methanolic crude extract and its fractions (acid ethereal, basic ethereal, ...
Avaliação de fotorreatores na degradação de corantes reativos e efluente têxtil
(Universidade Federal de Santa Maria, 2004-02-27)
The continuous search for better quality of life, nowadays, implies in industrial growth e, consequently, in greater or minor degree of environmental pollution. The textile industry is responsible for part of this pollution; ...
Reação de alquinos terminais com 1,1,1-trialo-4-alcóxi-3- alquen-2-onas
(Universidade Federal de Santa Maria, 2005-02-21)
In this work a convenient method of synthesis of 9 eninones is presented, through the reaction of different acetylenes (phenylacetylene, 1-heptyne and 1-hexyne) with n-butillithium and subsequently with electrophiles ...