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Título

6β,22-Dihydroxyhopane, a new triterpene from the fern Cheilanthes marantae

AutorGonzález, Antonio G.; Betancor, Carmen; Salazar, José A.; Hernández, Rosendo
Palabras claveCheilanthes marantae
Sinopteridaceae
Doradilla acanalada
Fern
Triterpenes
Steroids
Diplopterol
Fernenol
6β,22-dihydroxyhopane
Sitosterol
Sitosterol-o-β-D-glucoside
Fecha de publicación1976
EditorElsevier
CitaciónPhytochemistry 15(12): 1996-1997 (1976)
ResumenIn addition to saccharose, diplopterol, femenol, sitosterol and sitosterol-o-β-D-glucoside, the new natural triperpene 6β,22-dihydroxyhopane (1a), characterized by its IR, PMR and MS spectra, was isolated from the stems and leaves of Cheilanthes marantae. The hopane framework of (1a) was deduced from its MS which showed the same fragmentation pattern as that of zeorin (1d) and related compounds [I]. The large downfield shifts of the methyl groups at C-4β, C-8β and C-10β observed in the PMR spectrum (ca 0.35 ppm) compared with 22-hydroxyhopane are compatible only with the presence of a C-6β hydroxyl group [2]. These assumptions were chemically confirmed by partial synthesis of (1a) from zeorin.
Descripción2 pages, 1 scheme.
Versión del editorhttp://dx.doi.org/10.1016/S0031-9422(00)88873-1
URIhttp://hdl.handle.net/10261/16416
DOI10.1016/S0031-9422(00)88873-1
ISSN0031-9422
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