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Itens para a visualização no momento 21-30 of 34
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 ...
Obtenção regiosseletiva de 5-alquil(aril/heteroaril)-3- (carboxil/trifluormetil)-1h-1-fenilpirazóis
(Universidade Federal de Santa Maria, 2011-05-19)
This paper presents a new synthetic route for obtain regioselective 5-alkyl(aryl/heteroaryl)-3-trifluoromethyl-1H-1-phenylpyrazoles (3a-e) (50-85% yields) and 5-alkyl(aryl/heteroaryl)-3-carboxialkyl-1H-1-phenylpyrazoles ...
5-trialometil-4,5-diidro-1h-1-(carbonilpiridil)pirazóis: síntese e atividade biológica frente ao Mycobacterium tuberculosis
(Universidade Federal de Santa Maria, 2008-08-06)
This work describes the synthesis of series of 5-hydroxy-3-[alkyl(aryl/heteroaryl)]-5-trifluoro[chloro]methyl-4,5-dihydro-1H-1(carbonylpyridyl)pyrazoles, obtained from the
reactions of 1,1,1-trihalo-4-[alkyl(aryl/hetero ...
Síntese regioespecífica de 1H-pirazolilquinolinas trifluormetil substituídas
(Universidade Federal de Santa Maria, 2004-07-27)
This work describes the synthesis of a serie of 4-(3-alkyl(aryl)-5-trifluoromethyl-1Hpyrazol-
1-yl)-7-chloroquinolines (6), from the cyclondensation reactions of 1,1,1-trifluoro-
4-methoxy-3-buten-2-ones (4) and ...
Síntese e reações de 5-trifluormetil- 4,5-diidro-1H-1-pirazoltiocarboxamida 3(4)-substituídos
(Universidade Federal de Santa Maria, 2002-07-26)
This thesis describes the synthesis and application as bi-heterocyclic precursor a
series of 3-aryl[alkyl]-5-hydroxy-5-trifluoromethyl-4,5-dihydro-1H-1-
pyrazolethiocarboxamides (2), which are easily obtained from the ...
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 ...
Uso de energia microondas na síntese de enonas e de 4,5-diidropirazóis trialometil-substituídos
(Universidade Federal de Santa Maria, 2007-08-17)
The solvent-free microwave-assisted regiospecific synthesis of a series of 5-trihalomethyl-4,5-dihydro-1H-pyrazole (7 - 10) from the cyclocondensation of 1,1,1-
trihalo-4-alkoxy-3-alken-2-ones (5 - 6),[ CX3COC(R)2=C(R)1OR, ...
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], ...