Constituents from the bark of Tabebuia impetiginosa

Sixteen compounds were isolated from the bark of Tabebuia impetiginosa, whose structures were determined using both spectroscopic and chemical methods. The bark of Tabebuia impetiginosa afforded nineteen glycosides, consisting of four iridoid glycosides, two lignan glycosides, two isocoumarin glycos...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 2004-07, Vol.65 (13), p.2003-2011
Main Authors: Warashina, Tsutomu, Nagatani, Yoshimi, Noro, Tadataka
Format: Article
Language:English
Subjects:
Bignoniaceae
Biological and medical sciences
chemical constituents of plants
Chemical constitution
chemical reactions
chemical structure
Circular Dichroism
Fundamental and applied biological sciences. Psychology
glycosides
Glycosides - chemistry
Glycosides - isolation & purification
Hydrolysis
Iridoid
iridoid glycosides
Isocoumarin
isocoumarin glycosides
Lignan
lignans
Magnetic Resonance Spectroscopy
medicinal plants
Molecular Structure
phenolic compounds
Phenolic glycoside
phenolic glycosides
Phenylethanoid
phenylethanoid glycosides
Plant Bark - chemistry
plant extracts
Plant physiology and development
spectral analysis
Tabebuia
Tabebuia - chemistry
Tabebuia impetiginosa
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Summary:Sixteen compounds were isolated from the bark of Tabebuia impetiginosa, whose structures were determined using both spectroscopic and chemical methods. The bark of Tabebuia impetiginosa afforded nineteen glycosides, consisting of four iridoid glycosides, two lignan glycosides, two isocoumarin glycosides, three phenylethanoid glycosides and eight phenolic glycosides. Their structures were determined using both spectroscopic and chemical methods. Iridoid glycosides, phenylethanoid glycosides and lignan glycosides had ajugol, osmanthuside H and secoisolariciresinol 4- O-β- d-glucopyranoside as their structural elements, respectively, whereas the aglycone moieties of the isocoumarin glycosides were considered to be (−)-6-hydroxymellein. Phenolic glycosides had 4-methoxyphenol, 2,4-dimethoxyphenol, 3,4-dimethoxyphenol, 3,4,5-trimethoxyphenol and vanillyl 4-hydroxybenzoate as each aglycone moiety. Additionally, the sugar chains of these isocoumarin glycosides and phenolic glycosides were concluded to be β- d-apiofuranosyl-(1 → 6)-β- d-glucopyranoside as well as those of osmanthuside H and above phenylethanoid glycosides.
ISSN:0031-9422
1873-3700
DOI:10.1016/j.phytochem.2004.06.012