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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

[en] SYNTHESIS OF NOVEL 1,2,3-TRIAZOLE BY CYCLOADDITION 1,3-DIPOLAR REACTION POTENTIALLY BIOACTIVE / [pt] SÍNTESE DE NOVOS 1,2,3-TRIAZÓIS VIA REAÇÃO DE CICLOADIÇÃO 1,3-DIPOLAR POTENCIALMENTE BIOATIVOS

TALITA DE PAIVA ROSA 06 January 2022 (has links)
[pt] A importância terapêutica dos compostos contendo 1,2,3-triazóis deve-se ao seu espectro de atuação farmacológica, entre as quais podemos destacar a ação anticâncer, antiviral, antibacteriana, antifúngica, anticonvulsivante entre outras. A facilidade sintética de obtenção de 1,2,3- triazóis por meio da reação de cicloadição 1,3 –dipolar catalisada por cobre (CuAAc), também denominada click chemistry, bem como a reação de cicloadição térmica 1,3-dipolar, torna este grupo bastante atraente como um grupo farmacofórico. O presente trabalho tem como objetivo geral o planejamento, síntese e avaliação de fenil(1-fenil-1H-1,2,3-triazóis-4-il)metanol, também denominados hidróxi-1,2,3-triazóis, visando analisar suas ações farmacológicas frente a leishmaniose. Duas estratégias foram desenvolvidas para a obtenção destes compostos: (i) reação de cicloadição 1,3-dipolar catalisada por cobre (CuAAC) entre 1-fenil-3-(trimetilsilil)prop-2-in-1-óis e aril azidas substituídas previamente preparadas levando assim a obtenção dos fenil(1-fenil-1H-1,2,3-triazóis-4-il)metanol com rendimentos entre 20 e 30 por cento. As aril azidas foram preparadas à partir das anilinas em 60 a 85 por cento de rendimentos e os 1-fenil-3-(trimetilsilil)prop-2-in-1-óis foram preparados à partir da adição de etiniltrimetilsilano aos benzaldeídos comerciais (ii) reação de cicloadição térmica entre aril azidas e (E)-3-(dimetilamino)-1-fenilprop-2-en-1-ona - previamente preparadas à partir de 4-bromoacetofenonas, em rendimentos de 40-50 por cento, seguida de redução dos fenil(1-fenil-1H-1,2,3-triazóis-4-il)metanona com rendimentos variando entre 35-50 por cento levando assim a obtenção dos fenil(1-fenil-1H-1,2,3-triazóis-4-il)metanóis com rendimentos entre 20 e 30 por cento. Os compostos sintetizados foram caracterizados por técnicas de espectroscopia de ressonância magnética nuclear (RMN), infravermelho (IV) e espectrometria de massas (CG-MS). / [en] The therapeutic importance of compounds containing 1,2,3-triazoles is due to their spectrum of pharmacological activity, among which we can highlight the anticancer, antiviral, antibacterial, antifungal, anticonvulsant action, among others. The synthetic facility to obtain 1,2,3-triazoles through the 1,3-dipolar copper-catalyzed cycloaddition reaction (CuAAc), also called click chemistry, as well as the 1,3-dipolar thermal cycloaddition reaction, makes this group quite attractive as a pharmacophoric group. The present work has a general objective the planning, synthesis and evaluation of phenyl (1-phenyl-1H-1,2,3-triazoles-4-yl) methanol, also called hydroxy-1,2,3-triazoles, aiming to analyze their pharmacological actions against leishmaniasis. Two strategies were developed to obtain these compounds: (i) 1,3-dipolar copper-catalyzed cycloaddition reaction (CuAAC) between 1-phenyl-3- (trimethylsilyl) prop-2-in-1-ois and aryl azides substituted previously prepared thus leading to obtaining phenyl (1-phenyl-1H-1,2,3-triazoles-4-yl) methanol with yields between 20 and 30 percent. Aryl azides (50a-i) were prepared from anilines in 60 to 85 percent yields and 1-phenyl-3- (trimethylsilyl) prop-2-in-1-ois were prepared from the addition of ethinyltrimethylsilane to commercial benzaldehydes (ii) thermal cycloaddition reaction between aryl azides and (E) -3- (dimethylamino) -1-phenylprop- 2-en-1-one - previously prepared from 4-bromoacetophenones, in yields of 40-50 percent, followed by reduction of phenyl (1-phenyl-1H-1,2,3-triazoles-4- il) methanone with yields varying between 35-50 percent thus leading to the obtaining of phenyl (1-phenyl-1H-1,2,3-triazoles-4-yl) methanols with yields between 20 and 30 percent. The synthesized compounds were characterized by nuclear magnetic resonance (NMR), infrared (IR) and mass spectrometry (CG-MS) techniques.

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