Banca de QUALIFICAÇÃO: MARIA DE FÁTIMA ROCHA DE LIMA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : MARIA DE FÁTIMA ROCHA DE LIMA
DATA : 25/02/2019
HORA: 09:00
LOCAL: Auditório do Química III
TÍTULO:

Chemical and Biological Prospecting of Caatinga Species: Euphorbia tirucalli, Bredemeyera brevifolia and Bredemeyera floribunda

PALAVRAS-CHAVES:

Euphorbia tirucalli; Biological Activities; Flavonoids; Triterpenes; Xanthones; Phenolic compounds.

PÁGINAS: 140
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Orgânica
ESPECIALIDADE: Fotoquímica Orgânica
RESUMO:

Brazilian biodiversity is an inexhaustible source of organic molecules of biological interest, the caatinga biome has a great contribution to the search for these biotechnological potential molecules. Numerous species of the caatinga are reported in the literature by the broad spectrum of biological activity and chemical diversity of their micromolecular constituents. Due to the potential of this biome, the chemical and biological investigation of three species of the caatinga, Euphorbia tirucalli L., Bredemeyera floribunda Willd and Bredemeyera brevifolia resulted in the isolation of several compounds by chromatographic technique. Thus, the study allowed the isolation of a pentacyclic triterpene, β-amyrin, from an elagic acid derivative, 3,5-dimethoxy-4'-hydroxy-4-pyran-raminose-ellagic acid, reported for the first time in literature, in addition to other phenolic derivatives belonging to the E. tirucalli species. The study also allowed the isolation of mono and trimethoxylated xanthones in the genus Bredemeyera as well as flavonoid compounds such as quercetin, Canferol and rutin. The characterization and structural elucidation of the compounds were performed through the analysis of Hydrogen-1 and Carbon-13 Nuclear Magnetic Resonance Spectrometry data through uni and bidimention pulse sequences as well as the comparison with literature data.

MEMBROS DA BANCA:
Presidente - 1569526 - RENATA MENDONÇA ARAUJO
Interna - 2140775 - LIVIA NUNES CAVALCANTI
Externa ao Programa - 1569330 - GRAZIELLE TAVARES MALCHER
Externa à Instituição - DEBORAH MUNIQUE NOGUEIRA DE SOUSA FONTOURA - UNIFACEX
Externa à Instituição - JULIANA FÉLIX DA SILVA - UFC