Fern Constituents: Triterpenoids Isolated from the Leaves of Adiantum edgeworthii. Structures of 19.ALPHA.-Hydroxyadiantone and Fern-9(11)-en-25-oic Acid.
作者:Kenji SHIOJIMA、Hiroyuki AGETA
DOI:10.1248/cpb.42.45
日期:——
From the leaves of Adiantum edgeworthii, two new triterpenoids, 19α-hydroxyadiantone (1) and fern-9(11)-en-25-oic acid (2) were isolated, together with fern-9(11)-ene (3), fern-7-ene (4), neohop-12-ene (5), filic-3-ene (6), hop-22(29)-ene (7), adiantone (8), hydroxyhopane (9) and zeorin (10). The structures of 1 and 2 were elucidated on the basis of spectral data and chemical correlations with a known compound.
A new triterpene has been isolated from the fern Adiantum venustum. Its structure has been elucidated to be fern-9(11)-en-25-oic acid by spectral methods.
Formation of 9,25-Cyclofernane by Reductive Homoallylic Cyclization of Fern-9(11)-en-25-ol Mesylate.
作者:Yoshinori FUJIMOTO、Chikako MURASAKI、Tadashi EGUCHI、Katsumi KAKINUMA、C. P. DUTTA
DOI:10.1248/cpb.42.1334
日期:——
Treatment of fern-9(11)-en-25-ol mesylate (2) with LiAlH4 in refluxing tetrahydrofuran afforded 9, 25-cyclofernane(4), a new cyclopropane ring-containing triterpene, in a moderate yield.