Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This work describes the synthesis of series of 5-hydroxy-3-[alkyl(aryl/heteroaryl)]-5-trifluoro[chloro]methyl-4,5-dihydro-1H-1(carbonylpyridyl)pyrazoles, obtained from the
reactions of 1,1,1-trihalo-4-[alkyl(aryl/heteroaryl)]-4-alkoxy-3-alken-2-ones [CX3C(O)CH=CR1OR, where R = Me, Et; R1 = H, Ph, 4-ClPh, 4-BrPh, 4-FPh, 4-MePh, 2-Furyl, 2-Thienyl and X= F, Cl] with hidrazines (NH2NHC(O)Z), where Z = 4-pyridyl, 2-chloro-4-pyridyl and 3-pyridyl, in good yields (50-89%). The obtained compounds were evaluated for their in vitro biological activities against Mycobacterium tuberculosis ATCC 27294 (H37Rv) strains, where it was found that trifluoromethylated compounds were more active than their trichloromethylated analogues. Moreover, the position of the atom of nitrogen and the chloro substituent in the ring of pyridine influences the activity of these compounds. The synthesised pyrazoles with
substituints R1= H and X=F (3a) and R1=4-MePh and X=F (3g) showed the best activity against the tested strains above mentioned. The compounds were characterized by analytical 1H and 13C NMR and of Mass Spectrometry (GC-MS), and its purities they were determined by Elementary analysis
analysis. / O presente trabalho descreve a síntese de séries de 5-hidroxi-3-alquil(aril/heteroaril)-5-trifluor[cloro]metil-4,5-diidro-1H-1-(carbonilpiridil)pirazóis, obtidas a partir de reações de
1,1,1-trialo-4-alquil(aril/heteroaril)-4-alcoxi-3-alquen-2-onas [CX3C(O)CH=CR1OR, onde R = Me, Et; R1 = H, Ph, 4-ClPh, 4-BrPh, 4-FPh, 4-MePh, 2-Furil e 2-tienil e X = F, Cl] com
hidrazinas (NH2NHC(O)Z, onde Z = 4-piridil, 2-cloro-4-piridil e 3-piridil), em bons rendimentos ( 50-89%). Os compostos sintetizados foram avaliados quanto à atividade biológica in vitro frente ao de Mycobacterium tuberculosis ATCC 27294(H37Rv), onde verificou-se que compostos trifluormetilados são mais ativos que seus análogos triclorometilados. Além disso, a posição do átomo de nitrogênio e o substituinte cloro no anel piridínico influenciaram na atividade destes compostos. Os pirazóis sintetizados com substituintes R1= H e X=F (3a) e R1= 4-MePh e X=F (3g) apresentaram melhor ativade contra as cepas testadas, mencionadas acima. Os compostos foram caracterizados a partir dos dados de RMN de 1H, RMN de 13C {1H} e por Espectrometria de Massas, e sua pureza comprovada por Análise Elementar.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufsm.br:1/10434 |
| Date | 06 August 2008 |
| Creators | Navarini, Jussara |
| Contributors | Bonacorso, Helio Gauze, Alves, Sydney Hartz, Flores, Alex Fabiani Claro |
| Publisher | Universidade Federal de Santa Maria, Programa de Pós-Graduação em Química, UFSM, BR, Química |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFSM, instname:Universidade Federal de Santa Maria, instacron:UFSM |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 100600000000, 400, 500, 500, 500, 500, 06c852ad-d805-43c3-99d6-93a6a86f507c, b2f5a0e3-a336-4863-940b-4874569e988d, 7928080e-16be-47fd-b0a3-6d394fcd82a7, 17a00027-8984-4561-9228-46697f540c2b |
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