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Título

Isolation and structure elucidation of three neo-clerodane diterpenes from Teucrium fruticans L. (LABIATAE)

AutorColl Toledano, Josep; Tandrón, Yudelsy A.
Palabras claveStructure Elucidation
Teucrium fruticans
Neo-clerodanes
Antifeedant activity
Antifungal activity
Fecha de publicación24-ago-2005
EditorElsevier
CitaciónPhytochemistry 66(19): 2298-2303 (2005)
ResumenRecently, the isolation from Teucrium fruticans of neo-clerodanes, namely 7β-hydroxyfruticolone, 11-hydroxyfruticolone, deacetylfruticolone and 6-acetyl-10-hydroxyteucjaponin B, in addition to fruticolone, isofruticolone and 8β-hydroxyfruticolone (three out of the four previously reported ones), and 6-acetylteucjaponin B (isolated from T. scordium and T. grisebachii) was reported. Minor compounds presumably of neo-clerodane nature were shown by HPLC analysis on a new extract. Three new compounds, difuranofruticol, deoxyfruticolone and 10-hydroxyteucjaponin B, and the known 7,8-didehydrofruticolone were unambiguously elucidated based on extensive NMR spectral studies (one- and two-dimensional experiments). The compounds were assayed for their antifeedant activity against Spodoptera littoralis and for their antifungal activity against Rhizoctonia solani. Compounds 9–11 showed low antifeedant activity and the feeding ratio of 12 was moderate-low. None of the tested compounds displayed significant activity against R. solani.
Descripción6 pages, 1 figure, 1 scheme, 5 tables.-- PMID: 16122769 [PubMed].-- Printed version published Oct 2005.-- Dedicated to Prof. Francisco Camps on the occasion of his 70th birthday.-- Issue title: "Reports on Structure Elucidation".
Versión del editorhttp://dx.doi.org/10.1016/j.phytochem.2005.07.003
URIhttp://hdl.handle.net/10261/15795
DOI10.1016/j.phytochem.2005.07.003
ISSN0031-9422 (Print)
1873-3700 (Online)
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