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Síntese de compostos heterocíclicos nitrogenados via reações de ciclização promovidas por espécies eletrofílicas de organocalcogênios: síntese de derivados de azaespiros e pirroloquinolinas
(Universidade Federal de Santa Maria, 2021-07-28)
In the present work, a synthetic route was developed for the preparation of 3- (organochalcogenyl)-azaespiro. The methodology developed involves an ipso cyclization reaction of arylpropynyl amides 1 in the presence of ...
Síntese de 1-(selenobutil)-2-fenil-4h-selenofeno[2,3-c]cromenos via reação de ciclização cascata mediada por FeCl3
(Universidade Federal de Santa Maria, 2020-02-21)
The synthesis of heterocyclic compounds is of great importance within the
chemistry of materials and the biological area, targeting both the chemical industry and
the pharmaceutical industry. Among the different heteroatoms ...
Síntese de α-metileno-β-lactamas via ciclização intramolecular de n-propiolamidas catalisada por t-BuOK e sua funcionalização via arilação de Heck catalisada por paládio
(Universidade Federal de Santa Maria, 2021-04-30)
The present work describes the regio- and stereoselective synthesis of α-methylene-β-lactams through intramolecular cyclization of different N-propiolamides catalyzed by potassium tert-butoxide. The same, in catalytic ...
Síntese de 1H-isocalcogênocromenos via NA2SE a partir de derivados de eninos
(Universidade Federal de Santa Maria, 2020-02-21)
In the present work, we developed the synthesis of 1H-isocalcogenochromene via a nucleophilic
addition of Na2Se to enynes. The reaction parameters were studied and the results
indicated that the reaction of enynes (0.25 ...
Síntese de 3-(organocalcogenil)-imidazotiazinas e funcionalização de inamidas via reações de ciclização, clorosselenação e tosilação promovidas por cloreto férrico e ácido p-toluilssulfônico
(Universidade Federal de Santa Maria, 2022-02-21)
In this thesis, four synthetic protocols were developed for the synthesis of four new classes of compounds, including the synthesis of 3-(organocalalcogenyl)-benzoimidazothiazines, 4-(organocalalcogenyl)-oxazolones, vinyl ...
Reações entre (e)-5-bromo-1,1,1-trialo-4-metoxipent-3-en-2-onas e aminoácidos para produção de heterociclos de 5, 6 e 7 membros
(Universidade Federal de Santa Maria, 2022-05-13)
This work present the versatility of 4-alkoxy-5-bromo-1,1,1-trialopent-3-en-2-ones in reactions with amino acids, exploring the four reactive centers of this building block and leading to the formation of heterocycles of ...
Regioquímica da reação de alquilação entre 4- (trialometil)pirimidin-2(1h)-onas e 5-bromoenonas
(Universidade Federal de Santa Maria, 2022-09-23)
The present thesis reports the reactivity study between 5-bromo-1,1,1,-trifluoro-4-
methoxy(amino)pent-3-en-2-ones (5-bromoenones/enaminones) towards 5- or 6-
substituted 4-(trihalomethyl)pyrimidin-2(1H)-ones. During the ...