Synthesis of 6-methylsubstituted 2-phenyl-3H-pyrimidin-4-ones and 4-trifluoromethyl-2-ureido pyrimidines / Síntese de 2-fenil-3H-pirimidin-4-onas 6-metilsubstituídas e 4- trifluormetil-2-ureído pirimidinas
AUTOR(ES)
Leonardo Fantinel
DATA DE PUBLICAÇÃO
2009
RESUMO
This study was carried out in three parts: At first, three methods for the bromination of 6-alkylsubstituted 2-phenyl-3H-pyrimidin-4-ones was developed for the synthesis of: (i) a new series of 6-alkylsubstituted 5-bromo-2-phenyl-3H-pyrimidin-4-ones, (ii) a new series of 6-(1-bromoalkyl)-2-phenyl-3H-pyrimidin-4-ones, and (iii) e new series of 5-bromo-6-(1-bromoalkyl)-2-phenyl-3H-pyrimidin-4-ones. On the second part, the brominated pyrimidines obtained, were used to synthesize new 6-methylsubstituted 2-phenyl-3Hpyrimidin-4-ones from the reaction of the brominated pyrimidinones with primary and secondary amines, pyridine and sodium azide. On the third part, a new series of 5- e 6-substituted 4-trifluoromethyl-2-ureido pyrimidines was prepared, in good yields, from the cyclocondensation reaction of - alkoxyvinyl-trifluoromethylketones substituted and dicyanodiamide. The products synthesized in this study were obtained in good yields and were characterized by GC-MS and 1H e 13C RMN spectroscopy. The purity of the products was assured by elemental analysis. Some compounds such as 5-bromo-2-phenyl-6-propyl-3H-pyrimidin-4-one, 5-bromo-6-(1- bromopropyl)-2-phenyl-3H-pyrimidin-4-one, 5-bromo-6-(1-bromobutyl)-2-phenyl-3H-pyrimidin-4-one, 6-(1-azidoethyl)-5-bromo-2-phenyl-3H-pyrimidin-4-one, 6-(1-azidopropyl)-5-bromo-2-phenyl-3H-pyrimidin-4-one, and 6-(1-azidobutyl)-5-bromo-2-phenyl-3H-pyrimidin-4-one, exhibited significant antimicrobial activity against some microorganisms, such as Candida albicans, Saccharomyces cerevisiae, Staphylococcus aureus, Salmonela, Klebsiela pneumonie among others.
ASSUNTO(S)
benzamidine hydrochloride pyrimidinones dicianidiamida quimica bromination
ACESSO AO ARTIGO
http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2494Documentos Relacionados
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