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Title

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

AuthorsGonzález, Antonio G.; Betancor, Carmen; Salazar, José A.; Hernández, Rosendo
KeywordsCheilanthes marantae
Sinopteridaceae
Doradilla acanalada
Fern
Triterpenes
Steroids
Diplopterol
Fernenol
6β,22-dihydroxyhopane
Sitosterol
Sitosterol-o-β-D-glucoside
Issue Date1976
PublisherElsevier
CitationPhytochemistry 15(12): 1996-1997 (1976)
AbstractIn 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.
Description2 pages, 1 scheme.
Publisher version (URL)http://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
Appears in Collections:(IPNA) Artículos
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