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Itens para a visualização no momento 91-100 of 104
Pirazolo[1,5-a]pirimidinas: síntese e bromação
(Universidade Federal de Santa Maria, 2006-01-27)
The synthesis of a series of 2-methyl-7-trichloromethylpyrazolo[1,5-a]pyrimidines from the cyclocondensation reaction of 3-amino-5-methylpyrazole with 1,1,1-trichloro-4- alkoxyalk-3-en-2-ones [CCl3C(O)CH=C(R1)OR where R1 ...
Síntese de β -seleno-aminas quirais, selenocisteína e seus derivados via selenolatos de índio
(Universidade Federal de Santa Maria, 2005-12-09)
Não foi possível inserir o abstract.
Síntese de sulfetos e selenetos oxazolidínicos: catalisadores quirais na adição de dietilzinco ao benzaldeído
(Universidade Federal de Santa Maria, 2002-10-17)
Não foi possível inserir o abstract.
Síntese e análise estrutural de complexos de urânio(VI) com hidrazonas, semicarbazonas e ligantes relacionados
(Universidade Federal de Santa Maria, 2006-10-02)
Uranyl complexes with ligands with oxygen and nitrogen donors have been extensively reviewed and they have aroused interest on account of their high stability, usefulness in selective chemical separations and their formation ...
Síntese de 3H-pirido[2,3-b][1,4]diazepinos trifluormetil substituídos e diazepinonas análogas
(Universidade Federal de Santa Maria, 2006-12-19)
The present research describes new synthetic methodologies for the synthesis of new series of 2-aryl(heteroaryl)-4-trifluoro-4,5-dihydro-3Hpyrido[2,3-b][1,4]diazepin-4-ols and 2-aryl(heteroaryl)-3H-pyrido[2,3-b][1,4]diaz ...
Investigação de complexos binucleares de K+ E CU(II) com ligantes 1,3-diariltriazenidos simétricos
(Universidade Federal de Santa Maria, 2006-12-15)
At work present it synthesized and determined itself the molecular structure of a copper complex (II) and another of potassium in which both involve triazenides ligands
monocatenados previously deprotonated. The reaction ...
Síntese e caracterização estrutural de pirazolinil-tolil-sulfonas trialometil substituídas de interesse antimicrobiano
(Universidade Federal de Santa Maria, 2006-02-02)
The present research describes the use of b-alcoxyvynil
trihalomethyl ketones [CX3C(O)CR2CR1R, where X= Cl, F; R= OMe, OEt; R1: H, Me, Ph, 4-MePh, 4-MeOPh, 4-BrPh, 4-ClPh, 4-FPh; R2= H, Ph] in the regiospecific synthesis ...
Emprego de ultrassom para a oxidação e separação de compostos orgânicos sulfurados em hidrocarbonetos e determinação de enxofre por técnicas espectrométricas e cromatográficas
(Universidade Federal de Santa Maria, 2009-04-13)
In this work, a process based on ultrasonic energy for sulfur removal from
petroleum fractions was proposed. The process combines ultrasonic energy and a
peroxyacid reagent in order to achieve the required sulfur content ...
Estudo de reações de N-alquilação de pirimidin-2-onas: síntese de novos análogos nucleosídicos modificados
(Universidade Federal de Santa Maria, 2008-01-15)
This work presents a study of the N-alkylation reactions of 4-
(trichloromethyl)pyrimidin-2(1H)-one(2), 5-bromo-4-methoxy-4-(trichloromethyl)-3,4-dihydropyrimidin-2-(1H)-one (7), 4-methoxy-4-(trichloromethyl)-3,4-dihydr ...
Síntese de 3-trifluoracetilpirróis N-substituídos
(Universidade Federal de Santa Maria, 2008-02-18)
This work presents a new, simple and versatile one-pot strategy for the synthesis of new N-substituted 3-trifluoroacetyl-pyrroles. These compounds were obtained by the reaction of 3-trifluoroacetyl-4,5-dihydrofuran with ...