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Itens para a visualização no momento 21-26 of 26
Controle regioquímico na síntese de 1-Aril-3(5)-carboxialquil-1H-pirazóis
(Universidade Federal de Santa Maria, 2022-08-26)
The present dissertation reports the development of a methodology for the
regiochemical control in the synthesis of 1-aryl-3(5)-carboxyalkyl-1H-pyrazoles,
through cyclocondensation reactions using 4-alkoxy-1,1,1-trichl ...
Líquidos iônicos: aplicação na síntese de β-dimetilaminovinil cetonas e na N-alquilação de pirazóis
(Universidade Federal de Santa Maria, 2007-02-15)
The synthesis of two 1-methyl-3-alkylimidazolium tetrafluoroborate (where alkyl = butyl, octyl; [BMIM]BF4 and [OMIM]BF4) based on room temperature ionic
liquids (RTIL) is reported. The usefulness of these ionic liquids ...
Síntese e investigação da atividade biológica de pirazóis funcionalizados
(Universidade Federal de Santa Maria, 2006-08-16)
In this work, a method for the synthesis of a series of heterocyclic compounds that preserve the amino group of the starting material, is presented. For this study, a-oxoketene O,N-acetals were obtained from the reaction ...
Síntese de [2]rotaxanos: relação entre a estrutura de pirazóis ligados ao filamento linear e a formação da molécula entrelaçada
(Universidade Federal de Santa Maria, 2015-02-25)
This work reports the synthesis of new [2]rotaxanes, [2]-[1,2-bis(aminocarbonyl-
(1'-(1',1'-dimethylethyl)-1H-pyrazol-3'-yl))-ethane]-rotaxa-1,7,14,20-tetraaza-
2,6,15,19-tetraoxo-3,5,912,16,18,22,25-tetrabenzocicloexacosano], ...
β-Enaminonas, 5-hidróxi-4,5-diidropirazóis e 5-Hidróxi-4,5-diidroisoxazóis halometilsubstituídos: estudo molecular por difração de raios-x
(Universidade Federal de Santa Maria, 2008-08-08)
The molecular study by X-ray diffraction of β-aminovinyl ketones
[R3C(O)CH=C(R1)N(R4R5), onde R3 = CF3, CCl3, CHCl2; R1 = H, Me; R4 = H; R5 =
benzyl, Ph, 5-methylisoxazol-3-yl; R4, R5 = -(CH2)4-, -(CH2)2O(CH2)2-], methyl ...
Síntese de Pirimidinas derivadas de 7,7,7-trialo-4-metoxi-6-oxo-4- heptenoatos de metila e bi-heterociclos trifluormetilados
(Universidade Federal de Santa Maria, 2012-02-27)
An efficient method to obtain pyrimidinones and pyrimidines trialomethylated from the cyclocondensation reaction of compounds of methyl 7,7,7-trihalo-4-methoxy-6-oxoheptenoate
with urea and differents amidines providing ...