Studies on constituents of Abies grandis: The structures and absolute stereochemistry of cyclograndisolide and epicyclograndisolide,novel cyclopropane triterpene lactones |
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| Authors: | J.P. Kutney D.S. Grierson G.D. Knowles N.D. Westcott I.H. Rogers |
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| Affiliation: | Department of Chemistry, University of British Columbia, Vancouver 8, B.C. Canada;Western Forest Products Laboratory, Canada Department of Environment, Vancouver, B.C. Canada |
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| Abstract: | The light petroleum extract of grand fir [Abies grandis (Dougl.) Lindl.] was found to contain two novel triterpene lactones. The first compound, named cyclograndisolide, was shown by chemical and spectroscopic considerations and finally confirmed by X-ray analysis to be (23 R)-3α-methoxy-9,19-cyclo-9β-lanost-24-ene-26,23-olide (6). The second component, epicyclograndisolide was isomeric with the first and was assigned as (23 S)-3α-methoxy-9,19-cyclo-9β-lanost-24-ene-26,23-olide (10). |
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