Buscar
Itens para a visualização no momento 1-10 of 34
Aplicação de enonas cíclicas como precursores para síntese de trifluoracetiltetraidropiridinas e 1H-pirazóis-3(5)-carboxilato de etila
(Universidade Federal de Santa Maria, 2010-07-15)
The present work describes the synthesis of novel 1-alkyl(aryl)-2-alkoxy-5-trifluoroacetyl-1,2,3,4-tetrahydropyridines, aza-condensed tetrahydropyridines and ethyl-1H-pyrazoles-3(5)-carboxylate from the use of cyclic enones ...
Síntese de novos isoxazóis e pirazóis a partir de derivados 1,3-diíno indólicos
(Universidade Federal de Santa Maria, 2015-04-06)
In this work it describe the synthesis and characterization of new 1,3-diynes indole derivatives, the 1,6-bis(1H-indol-1-yl)hexa-2,4-diynes (6 examples) and unsymmetrical 1-(5-arylpenta-2,4-diynyl)-1H-indoles (6 examples), ...
Reações de 1,1,1-tricloro-4-metoxi-3-penten-2-ona com hidrazinas monosubstituídas
(Universidade Federal de Santa Maria, 2005-02-18)
The 1,1,1-trichloro-4-methoxy-3-penten-2-ona (CCl3COCH=CHOMe) reaction with hydrazines series (RNHNH2, where R = H, Me, tert-Bu, Ph, Ph(F)5, Ph-4-NO2, CO2Me e CONH2) yield to the pyrazoles N-substituted and derivatives ...
Reações de ciclocondensação de cianoacetoidrazida com enonas halometil-substituídas
(Universidade Federal de Santa Maria, 2008-02-22)
The synthesis of thirteen 3-(R1), 4-(R2) and 5-(R3)-substituted 1-cyanoacetyl-5-hydroxy-4,5-dihydro-1H-pyrazoles from the cyclocondensation reaction of 4-alkoxy-3-alken-2-ones [R3C(O)C(R2)=C(R1)(OR), where R3 = CF3,
CCl3, ...
Síntese de 5-hidróxi-3-(1,1-dimetoxietan-2-il)-5-trifluormetil-2-pirazolinas e 3-(1,1-difluoretan-2-il)-1H-pirazóis análogos
(Universidade Federal de Santa Maria, 2008-02-01)
This work describes, at first, the synthesis of 4,6,6-trimethoxy-1,1,1-trifluorohex-3-en-2-one by the acylation reaction of 1,1,3,3-tetramethoxybutane, in 65% yields.
Afterwards, the synthesis of a new series of ...
Síntese de 4-(1-fenil-5-trifluormetil-1h-pirazol-4-il)-1h-1,2,3-triazóis promovida por dialquil biaril fosfinas e catálise metálica
(Universidade Federal de Santa Maria, 2017-08-11)
The present dissertation describes the development of a three-step, one-pot methodology, involving the sequential reactions of Sonogashira cross-coupling, deprotection of terminal alkyne (removal of trimethylsilane group), ...
Efeitos energéticos e topológicos no design de cocristais de compostos aromáticos e em 1,5-diaril-1h-pirazol-3-carboxilatos de etila
(Universidade Federal de Santa Maria, 2017-07-20)
This work presents the study of the supramolecular environment in multicomponent crystals. Multicomponent
crystals were defined by J. D. Dunitz as a crystal containing two or more components together, so that this
concept ...
Nh-pirazóis e isoxazóis: síntese mecanicamente ativada por grinding
(Universidade Federal de Santa Maria, 2010-07-30)
The synthesis of twelve NH-pyrazoles from the cyclocondensation reaction of β-dimethylaminovinylketones ([R1C(O)C(R2)=CHN(Me)2], where R1 = Me, C6H5, 3-
MeO-C6H4, 4-Me-C6H4, 4-MeO-C6H4, 4-F-C6H4, 4-Cl-C6H4, 4-Br-C6H4, ...
Síntese de 1,1-dimetiletil-1h-pirazóis em líquidos iônicos
(Universidade Federal de Santa Maria, 2010-07-08)
This work describes the synthesis of a series of pyrazoles from enaminoketones (RC(O)CH=CHNMe2 where R = hexyl, dimethoxymethyl, Ph, 4-Me-C6H4 4-F-C6H4, 4-Cl-C6H4, 4-Br-C6H4, 4-O2N-C6H4, thien-2-yl, fur-2-yl, pyrrol-2-yl ...
Síntese de 1,1,1-trifluoro-4-metoxi-3-alquen-2-onas funcionalizadas e 1,2-azóis derivados
(Universidade Federal de Santa Maria, 2014-03-03)
This work describes the application of the method of trifluoroacetic anhydride acetal
acylation to four new functionalized ketones: 6-methyl-5-hepten-2-one, 4-phenyl-4-
oxobutanoic acid (3-benzoylpropionic acid), ...