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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

Estudo FitoquÃmico de Sclerobolium rugosum (Leguminosae) / Phytochemical study of Sclerobolium rugosum (Leguminosae)

Daniele Alves Ferreira 01 August 2008 (has links)
CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior / Neste trabalho à relatado o estudo fitoquÃmico de Sclerolobium rugosum, espÃcie da famÃlia Leguminosae, subfamÃlia Caesalpinoideae, uma planta encontrada nas margens de rios da regiÃo Nordeste do Brasil.NÃo existe nenhum estudo cientÃfico sobre a espÃcie, exceto a propriedade adstringente citado na medicina popular. A investigaÃÃo fitoquÃmica a partir dos extratos hexÃnico e etanÃlico da casca e lenho da raiz de S. rugosum atravÃs de cromatografia de gel de sÃlica, levou ao isolamento e identificaÃÃo do: lupeol, -sistosterol e estigmasterol glicosilados e um Ãster derivado do Ãcido cinÃmico (trans-triacontila-4-hidroxicinamato) (Tabela 01, pÃg. X). Os derivados reacionais foram obtidos tendo em vista a confirmaÃÃo das estruturas, treinamento das tÃcnicas usuais em laboratÃrio e, visando efetuar em etapa posterior, testes de atividades biolÃgicas. Os compostos naturais foram isolados e purificados utilizando a tÃcnica de cromatogrÃfica em coluna de gel de sÃlica (CC). A formaÃÃo dos derivados reacionais foi acompanhada atravÃs de cromatografia em camada delgada (CCD). A determinaÃÃo estrutural dos produtos naturais e seus derivados foram feitas por mÃtodos espectromÃtricos incluÃdo: RMN 1H e 13C (ressonÃncia magnÃtica nuclear), IV (infravermelho) e EM (espectro de massa). Com estas tÃcnicas tambÃm foi possÃvel estabelecer a configuraÃÃo relativa produtos naturais e seus derivados. / This work reports the study phytochemical investigation Sclerolobium rugosum, specie of the Leguminosae family, subfamily Caesalpinoideae, a plant found on the margins of rivers in the Northeast of Brazil. There is no any scientific study about this specie, except the astringent property cited in the folk medicine. Phytochemical investigation of hexane and ethanol extracts of bark and wood of the roots of S. rugosum using silica gel allowed to isolation and identification of: Lupeol, -sistosterol and stigmasterol glycosides and one ester derivative of cinnamic acid (trans-triacontyl-4-hydroxicinnamate) (Table 01, p. X). Derivatives reactions were obtained in order to determine structures, training of the usual techniques in the laboratory and to make further studies of biological activities. Natural compounds were isolated and purified using the technique of column chromatography on silica gel (CC). The formation of derivatives reactions were accompanied by Thin-Layer Chromatography (TLC). Structure determination of natural products and derivates were done by spectrometric methods including: NMR 1H and 13C (nuclear magnetic resonance), IR (Infrared) and MS (mass spectrum). With these techniques was also possible of establish the relative configuration of compounds and derivatives.

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