Síntese de 2-Benzil(metil)tio-6-aril(metil)pirimidinas-4-carboxilato de Etila e seus Ácidos Derivados

• Ano de defesa: 2012
• Autor(a) principal: Fortes, Andressa Silveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Química; UFSM; Programa de Pós-Graduação em Química
• Palavras-chave em Português: Pirimidinas; Reação de ciclocondensação; Reação de hidrólise básica; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/10522

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.