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Alcaloides ciclopeptídicos de Scutia buxifolia e suas atividades antimicrobianas
(Universidade Federal de Santa Maria, 2014-04-29)
The phytochemical investigation of the stem bark of the specie Scutia buxifolia (Rhamnaceae) led to the isolation of four cyclopeptide alkaloids: scutianine C (14) and three diastereoisomer of scutianine H (19), isolated ...
Avaliação de métodos de decomposição de chocolate e determinação de metais por ICP-OES e ICP-MS
(Universidade Federal de Santa Maria, 2014-02-13)
In this work, was evaluated the main methods of sample preparation reported in the literature for decomposition of chocolate and, in addition, was proposed the decomposition by microwave induced combustion (MIC) for further ...
Determinação de enxofre em amostras de grafite flexível por ICP OES utilizando piroidrólise como preparo de amostra
(Universidade Federal de Santa Maria, 2013-07-16)
The flexible graphite is a material produced from the intercalation, exfoliation
and compression of graphite. Due to its low porosity, high chemical and thermal
resistance, the flexible graphite is used in many different ...
Síntese de 1,2,4-oxadiazóis 3,5-dissubstituídos derivados de Laminoácidos e arilamidoximas sob irradiação de micro-ondas
(Universidade Federal de Santa Maria, 2013-02-28)
Here we report the synthesis and characterization of 3,5-disubstituted 1,2,4-oxadiazole 3 derivatives of N-protected L-amino acid 1 and arilamidoximas 2, and the reaction was performed in a microwave reactor, using water ...
Bi-heterociclos a partir do Ácido Levulínico: Síntese de 5-[(5-(trifluormetil)-5-hidroxi-(3-substituido)-4,5-diidro-1H-pirazol-1-il)-1-propan-1-ona-3-il]-2-metil-7-trifluormetil)pirazolo[1,5-a]pirimidinas
(Universidade Federal de Santa Maria, 2013-03-04)
An efficient method to obtain 2-methyl-5-(methylpropanoate-3-yl)-7-trifluoromethylpyrazolo[1,5-a]pyrimidine 2 from the reaction of compound methyl 7,7,7-trifluoro-4-methoxy-6-oxo-heptenoate with 3-amino-5-methyl-1H-pyrazol. ...
Síntese e cristaloquímica de complexos de mercúrio(ii) com o ligante 1-(3-trifluorometilfenil)-3-(3-nitrofenil)triazeno
(Universidade Federal de Santa Maria, 2005-08-01)
This work shows the crystaline/molecular structure of two mercury(II) complexes with a same monocateneted triazene ligand previolsly deprotonated. The reaction between mercury(II) acetate, 1-(3-nitrophenyl)-3-(3-trifluor ...
Determinação de glifosato e ampa em água por injeção direta da amostra em cromatografia iônica capilar e LC-MS/MS
(Universidade Federal de Santa Maria, 2014-08-29)
Glyphosate [N-(phosphonomethyl) glycine] is the most widely used pesticide in the world for controlling weeds in agriculture. High amounts of this herbicide and its major metabolite, aminomethylphosphonic acid (AMPA), have ...
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 ...