[article]
| Titre : |
A preliminary examination of the leaf oils of the genus xanthostemon (Myrtaceae) in Australia |
| Type de document : |
texte imprimé |
| Auteurs : |
Joseph J. Brophy, Auteur ; Robert J. Goldsack, Auteur ; Paul I. Forster, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
pp. 222-230 |
| Note générale : |
Génie Chimique |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Xanthostemon arenarius chrysanthus crenulatus eucalyptoides formosus oppositifolius paradoxus psidioides umbrosus verticillatus whitei xerophilus youngii sp. (Bolt Head J.R.Clarkson +8805) Myrtaceae Essential oils composition α -pinene β -caryophyllene δ -cadinene α -copaene β -selinene Spathulenol Apodophyllone Cyclocolorenone 1,3-dimethoxy-5-isopropylbenzene β -bisabolene Baeckeol methyl ether 7-epi-α -selinene Leptospermone Xanthostemone Methyl farnesoate Farnesoic acid 2-hydroxy-4,6-dimethoxy-3,5-dimethylisobutyrophenone Isobaeckeol |
| Résumé : |
The leaf oils of the Australian species of Xanthostemon have been examined by a combination of GC and GC/MS. Xanthostemon arenarius produced an oil dominated by sesquiterpenes, with the principal components being β-selinene (12–17%), α-selinene (6–10%), 7-epi-α-selinene (7–11%), α-humulene (0.3–10%, the majority > 6%) and spathulenol (3–19%). Xanthostemon chrysanthus produced a leaf oil in which the principal component was the β-triketone leptospermone (65–84%). The leaf oil of X. crenulatus was dominated by the sesquiterpene ketone, cyclocolorenone (65–80%) and the aromatic ketone apodophyllone (6–17%). The leaf oil of X. eucalyptoides was dominated by the aromatic ketones baeckeol methyl ether (34–41%), baeckeol (15–29%), isobaeckeol (5–8%) and apodophyllone (7–9%). The leaf oil of X. formosus was, once again, sesquiterpenoid in nature. The principal components were β-caryophyllene (10–24%), β-bisabolene (9–16%) and sesquiphellandrene (9–20%). Xanthostemon graniticus was unusual within the genus in that it produced a monoterpenic oil, the principal component being α-pinene (69.5%). Xanthostemon oppositifolius gave an oil which was dominated by β-triketones. The principal components were xanthostemone (1625%) and a compound considered a one carbon homologue, which is as yet unidentified (24–35%). Xanthostemon paradoxus produced a leaf oil that was sesquiterpenoid in nature. The principal components were β-caryophyllene (14%), spathulenol (14.9%) and globulol (8%). Xanthostemon psidioides was another species whose oil was dominated by β-triketones, the principal component being xanthostemone (73.1%).
Xanthostemon umbrosus, the species with the widest distribution in this investigation, produced a variable oil. The various oils were dominated by the sesquiterpene ketone, cyclocolorenone (77–83%), or methyl farnesoate (3257%) and farnesoic acid (9–26%) or α-santalene (6–7%), isobaeckeol (30–40%) and an unknown, presumed aromatic, compound mw 252 (3–23%). The leaf oil from X. verticillatus was unusual amongst the other Australian species of Xanthostemon in that it contained 1,3-dimethoxy-5-isopropylbenzene as its major component (96–97%). Xanthostemon whitei gave a sesquiterpenic oil which was similar to that produced by X. arenarius. Xanthostemon youngii also gave a sesquiterpenic oil, the principal components being α-copaene (3–13%), β-caryophyllene (11–13%), aromadendrene (3–12%), and γ-cadinene (4–18%). Xanthostemon sp. (Bolt Head JRC +8805) gave a terpenoid oil in which the major components were the hydrocarbons, γ-cadinene (18%) and calamenene (29.3%). Oil yields over the range of species were 0.1–0.6%, w/w, based on fresh leaves. |
| ISSN : |
1041-2905 |
| En ligne : |
http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699071#.Ua3YDdgYrOk |
in The journal of essential oil research > Vol. 18 N° 2 (Mars-Avril 2006) . - pp. 222-230
[article] A preliminary examination of the leaf oils of the genus xanthostemon (Myrtaceae) in Australia [texte imprimé] / Joseph J. Brophy, Auteur ; Robert J. Goldsack, Auteur ; Paul I. Forster, Auteur . - 2006 . - pp. 222-230. Génie Chimique Langues : Anglais ( eng) in The journal of essential oil research > Vol. 18 N° 2 (Mars-Avril 2006) . - pp. 222-230
| Mots-clés : |
Xanthostemon arenarius chrysanthus crenulatus eucalyptoides formosus oppositifolius paradoxus psidioides umbrosus verticillatus whitei xerophilus youngii sp. (Bolt Head J.R.Clarkson +8805) Myrtaceae Essential oils composition α -pinene β -caryophyllene δ -cadinene α -copaene β -selinene Spathulenol Apodophyllone Cyclocolorenone 1,3-dimethoxy-5-isopropylbenzene β -bisabolene Baeckeol methyl ether 7-epi-α -selinene Leptospermone Xanthostemone Methyl farnesoate Farnesoic acid 2-hydroxy-4,6-dimethoxy-3,5-dimethylisobutyrophenone Isobaeckeol |
| Résumé : |
The leaf oils of the Australian species of Xanthostemon have been examined by a combination of GC and GC/MS. Xanthostemon arenarius produced an oil dominated by sesquiterpenes, with the principal components being β-selinene (12–17%), α-selinene (6–10%), 7-epi-α-selinene (7–11%), α-humulene (0.3–10%, the majority > 6%) and spathulenol (3–19%). Xanthostemon chrysanthus produced a leaf oil in which the principal component was the β-triketone leptospermone (65–84%). The leaf oil of X. crenulatus was dominated by the sesquiterpene ketone, cyclocolorenone (65–80%) and the aromatic ketone apodophyllone (6–17%). The leaf oil of X. eucalyptoides was dominated by the aromatic ketones baeckeol methyl ether (34–41%), baeckeol (15–29%), isobaeckeol (5–8%) and apodophyllone (7–9%). The leaf oil of X. formosus was, once again, sesquiterpenoid in nature. The principal components were β-caryophyllene (10–24%), β-bisabolene (9–16%) and sesquiphellandrene (9–20%). Xanthostemon graniticus was unusual within the genus in that it produced a monoterpenic oil, the principal component being α-pinene (69.5%). Xanthostemon oppositifolius gave an oil which was dominated by β-triketones. The principal components were xanthostemone (1625%) and a compound considered a one carbon homologue, which is as yet unidentified (24–35%). Xanthostemon paradoxus produced a leaf oil that was sesquiterpenoid in nature. The principal components were β-caryophyllene (14%), spathulenol (14.9%) and globulol (8%). Xanthostemon psidioides was another species whose oil was dominated by β-triketones, the principal component being xanthostemone (73.1%).
Xanthostemon umbrosus, the species with the widest distribution in this investigation, produced a variable oil. The various oils were dominated by the sesquiterpene ketone, cyclocolorenone (77–83%), or methyl farnesoate (3257%) and farnesoic acid (9–26%) or α-santalene (6–7%), isobaeckeol (30–40%) and an unknown, presumed aromatic, compound mw 252 (3–23%). The leaf oil from X. verticillatus was unusual amongst the other Australian species of Xanthostemon in that it contained 1,3-dimethoxy-5-isopropylbenzene as its major component (96–97%). Xanthostemon whitei gave a sesquiterpenic oil which was similar to that produced by X. arenarius. Xanthostemon youngii also gave a sesquiterpenic oil, the principal components being α-copaene (3–13%), β-caryophyllene (11–13%), aromadendrene (3–12%), and γ-cadinene (4–18%). Xanthostemon sp. (Bolt Head JRC +8805) gave a terpenoid oil in which the major components were the hydrocarbons, γ-cadinene (18%) and calamenene (29.3%). Oil yields over the range of species were 0.1–0.6%, w/w, based on fresh leaves. |
| ISSN : |
1041-2905 |
| En ligne : |
http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699071#.Ua3YDdgYrOk |
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