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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

Síntese de 2-Benzil(metil)tio-6-aril(metil)pirimidinas-4-carboxilato de Etila e seus Ácidos Derivados / "Synthesis of Ethyl 2-Benzyl(methyl)thio-6-aryl(methyl)pyrimidines-4-carboxylate and their Acids Derivatives"

Fortes, Andressa Silveira 10 August 2012 (has links)
Conselho Nacional de Desenvolvimento Científico e Tecnológico / This work presents a simple and versatile synthetic strategy for the preparation of a novel series of Ethyl 2-Benzyl(methyl)tiopyrimidines-4-carboxylate 6-substituted and their acids derivatives. The Ethyl 2-Benzyl(methyl)tiopyrimidines-4-carboxylate 6-substituted were obtained from the reaction of 2-Benzyl(methyl)isothiourea with Ethyl 4-Aryl(methyl)-4-methoxy-2-oxo-3-butenoates (where Ar= Ph, 4-FC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4 and 4-NO2C6H4), in the presence of sodium carbonate in ethanol and water to produce the corresponding Ethyl 2-Benzyl(methyl)tiopyrimidines-4-carboxylate 6-substituted with good yields (52-94%). Acids derivatives of these Pyrimidines were obtained from the reaction one-pot" of 2-Benzyl(methyl)isothiourea with Ethyl 4-Aryl(methyl)-4-methoxy-2-oxo-3-butenoates (where Ar = Ph; 4-FC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4 and 4-NO2C6H4), in the presence of sodium carbonate in ethanol and water and, subsequently, with the addition of a solution of sodium hydroxide, producing the respective acids 2-Benzyl(methyl)thiopyrimidines-4-carboxylic 6-substituted with good yields (35-90%). The pyrimidines obtained in this study were identified by Hydrogen Nuclear Magnetic Resonance, Nuclear Magnetic Resonance Carbon-13, Infrared Spectroscopy, Elemental Analysis and Mass Spectroscopy. / Este trabalho apresenta uma estratégia sintética simples e versátil para a preparação de uma série de 2-Benzil(metil)tiopirimidinas-4-carboxilato de Etila 6-substituídas e seus Ácidos Derivados inédita. As 2-Benzil(metil)tiopirimidinas-4-carboxilato de Etila 6-substituídas foram obtidas a partir da reação de 2-Benzil(metil)isotiouréia com 4-Aril(metil)-4-metóxi-2-oxo-3-butenoatos de Etila (onde Ar= Ph, 4-FC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4 e 4-NO2C6H4), com a presença de carbonato de sódio em etanol e água, produzindo as respectivas 2-Benzil(metil)tiopirimidinas-4-carboxilato de Etila 6-substituídas com rendimentos bons (52-94%). Os ácidos derivados destas pirimidinas foram obtidas a partir da reação one-pot de 2-Benzil(metil)isotiouréia com 4-Aril(metil)-4-metóxi-2-oxo-3-butenoatos de Etila (onde Ar= Ph, 4-FC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4 e 4-NO2C6H4), com a presença de carbonato de sódio em etanol e água e, posteriormente, com a adição de uma solução de hidróxido de sódio, produzindo os respectivos Ácidos 2-Benzil(metil)tiopirimidinas-4-carboxílicos 6-substituídos com rendimentos bons (35-90%). As pirimidinas obtidas neste trabalho foram identificadas por Ressonância Magnética Nuclear de Hidrogênio, Ressonância Magnética Nuclear de Carbono-13, Espectroscopia de Infravermelho, Análise Elementar e Espectroscopia de Massas.

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