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Longipinane derivatives

Two more longipinane derivatives (218) and (219) have been isolated from Stevia species.A full paper on the chemistry of vulgarone A (220) and B (221) has been published." In keeping with the general rule that enantiomeric sesquiterpenoids are often found in liverworts, Matsuo have identified the... [Pg.34]

Some new longipinane derivatives (196a and b) and (197a and b) have been identified as constituents of the roots of Polypteris texana. The structure of... [Pg.75]

An X-ray analysis of rastevione, the main constituent of the roots of Stevia serrata and S. rhombifolia, has revealed it to have structure (284).144 This definitive assignment calls into question the relative stereochemistry assigned to more than fifteen other longipinene and longipinane derivatives isolated from various plant sources (see Vol. 7, p. 75, Vol. 9, p. 110, Vol. 10, p. 34). The tiglate (285) has been isolated from Eupatoriadelphus purpureus.lib... [Pg.115]

Further studies, conducted on similar longipinane derivatives examined the influence of stereochemistry in the molecular rearrangement. By simply altering the stereochemistry of the C(3) substituent, the reaction... [Pg.388]

Several new compounds isolated from various species of Stevia have been identified as acyloxy-derivatives (273)—(277) of the previously reported longipinane sesquiterpenoid vulgarone B (272) (Vol. 7, p. 75 Vol. 8, p. 87). In... [Pg.110]

See other pages where Longipinane derivatives is mentioned: [Pg.587]    [Pg.608]    [Pg.587]    [Pg.388]    [Pg.587]    [Pg.608]    [Pg.587]    [Pg.388]   
See also in sourсe #XX -- [ Pg.7 , Pg.218 ]

See also in sourсe #XX -- [ Pg.7 , Pg.218 ]



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Longipinanes

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