Neolignanas from an Embuia of Rio Grande do Sul, Brazil

Francisco Frick Neto, Frida Maciel Pagliosa, Maria Elizabeth do Canto Vinadé

Abstract


The n-hexane of the bark of Ocotea porosa fractioned by chromatographic tecniques, afforded there neolignanas of benzofuranoid, type: porosin, (2R,3a,3aR,5R)-3a-allyl-3-methyl-5-methoxy- 2- (3' ,4', dimethoxyphenyl )-6-oxo-2 ,3 ,3a ,4,5,6 hexahydrobenzofuran; II, rel (2R,3S,3aR,5R,6S,7 a S)-3a-allyl-6-7a-dihydroxi-3-methyl-5-methoxy-2- (3' ,4', dimethoxyphenyl )-2-3-3a ,4,5,6,7 ,7a-octahidrobenzofuran, and Il, reI (2R,3S,3aR,5R,6R,7 a S)-3a-allyl-6,7a-dihidroxy-3.;methyl-5-methoxy-2-(3' ,4', dimethoxyphenyl )-2,3,3a,5,6,7,7a-octahydrobenzofuran. The structures of isolated neolignanas were identified using IR, 1H spectral analysis and by comparison with published data of similar compounds.


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DOI: https://doi.org/10.5902/2179460X25486

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