ISSN:
1572-8854
Keywords:
Tonalensin
;
5,10-seco-neoclerodane
;
diterpenoid
;
cyclodeca-1,3,5-triene
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract We report the X-ray study on the structure of a newseco-neoclerodane diterpenoid, tonalensin, isolated from the aerial parts ofSalvia tonalensis. The compound crystallizes in the monoclinic space groupP21 witha=10.146(2),b=7.620(2),c=11.316(2) Å, β=109.58(2)°. Thetrans,cis,cis-cyclodeca-1,3,5-triene ring adopts a boat-chair conformation in which the Δ1,3,5-triene system is no longer coplanar. The γ-lactone and furan rings are essentially planar, while both five-membered rings of the dioxabicylooctane moiety arecis-fused and adopt a twist conformation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01673679
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