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Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392

Acta Amaz. vol.29 no.3 Manaus Sept. 1999

https://doi.org/10.1590/1809-43921999293422 

QUÍMICA

Brachyrachisina: Isoflavona inédita se Swartzia (Leguminosae)

Brachyrachisine: a new Isoflavone from Swartzia (Leguminosae)

Cesar Sáenz SANCHEZ 1  

Arnaldo F. Imbiriba da ROCHA 1  

M. L. Belém PINHEIRO 1  

Carlos H. S ANDRADE 1  

Francisco José Queiroz MONTE 2  

1Departamento de Química, Instituto de Ciências Exatas, Universidade do Amazonas- Av. General Rodrigo Otávio Jordão Ramos, 3000 - Manaus (AM) - CEP-69 070 000

2Departamento de Química Orgânica e Inorgânica, Centro de Ciências - Universidade Federal do Ceará - Campus do Pici - Fortaleza (CE) - CEP 60 021 970.


RESUMO

Dos extratos benzênico e clorofórmico da madeira de Swartzia brachyrachisHarms var. brachyrachis foram isolados, por métodos cromatográficos, uma isoflavona inédita (7,4'—diidroxi -5,3'5'-trimetoxi-6-metilisoflavona), denominada brachyrachisina, c um glicosídio (3-O-β-D-glicopiranosilsitosterol). As estruturas foram elucidadas através de análises espectroscópicas.

Palavras-Chave: Swartzia; 3-O-β-D-glicopiranosilsitosterol; brachyrachisina; 7,4'-diidroxi-5,3'.5'-trimetoxi-6-metilisoflavona

ABSTRACT

From the wood benzene and chloroform extracts of Swartzia brachyrachis Harms var.brachyrachis were isolated, by chromatografph methods, an undocumented isoflavone (7,4'-dihydroxy-5,3',5'—trimethoxy-6-methylisoflavone) named brachyrachisine and a glucoside (3-O-β-D-glucopyranosylsitosterol). The structures were elucidated by spectroscopic analysis.

Key words: Swartzia; 3-O-β-D-glucopyranosylsitosterol; brachyrachisine; 7,4'-dihydroxy-5,3',5'-trimethoxy-6-methylisoflavone

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