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Síntese de heteroarilazóis trialometilsubstituídos a partir de 2-acetilfurano e 2-acetiltiofeno
(Universidade Federal de Santa Maria, 2004-04-07)
The synthesis of 1,1,1-trihalo-4-methoxy-4-[2-thienyl]-3-buten-2-ones, 1,1,1-trihalo-4-methoxy-4-[2-furyl]-3-buten-2-ones and the respective trihalomethyl 1,3-butanone derivatives by trihaloacylation of dimethoxy acetals
derived ...
Estudo dos constituintes químicos de óleos voláteis de plantas medicinais do Rio Grande do Sul: isolamento, determinação e modificação estrutural e atividade biológica
(Universidade Federal de Santa Maria, 2004-10-27)
The essential oils of eight species of medicinal plants wild and cultivated in Rio Grande do Sul, pertaining to four botany family Asteraceae, Verbenaceae, Lamiaceae and Rutaceae were investigated as for its chemical ...
Síntese de 2-[3h-pirazol-2-il]trifluormetilpirimidinas Alquil, aril e heteroaril substituidas
(Universidade Federal de Santa Maria, 2004-07-14)
This work describes a general methodology for the synthesis of a novel series of 4-alkyl, 4-aryl, heteroaryl-2-[5-methyl-4-(2-hidroxyethyl)-3-oxo-1,2-dihydro-3H-pyrazol-2-yl]-6(4)-trifluoromethylpyrimidines. The precursors ...
Reações regioespecíficas de β-alcoxivinil trialometil cetonas com heteroaroilhidrazinas
(Universidade Federal de Santa Maria, 2004-12-20)
This work describe the regiospecific synthesis of three novel series of 1-(2-thenoyl)-, 1-(2-furoyl)- and 1-(isonicotinoyl)-3-alkyl(aryl)[heteroaryl]-5-hydroxy-5-trihalomethyl-4,5-dihydro-1H-pyrazoles, in good yields (50 ...
Síntese de derivados vinílicos e arílicos de compostos heteroaromáticos via reação de acoplamento do tipo Negishi
(Universidade Federal de Santa Maria, 2004)
Não foi possível inserir o abstract.
Síntese estereosseletiva de bis(calcogenetos) vinílicos vicinais
(Universidade Federal de Santa Maria, 2004-03-23)
In this work, we developed a new methodology to prepare vinylic
bis(chalcogenides) 4, of exclusive Z configuration. The reaction involves a
titanium-alkyne complexes and organochalcogen electrophilic species. The
vinylic ...