[article] in The journal of essential oil research > Vol. 18 N° 2 (Mars-Avril 2006) . - pp. 222-230 | 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 Xanthostemon chrysanthus Xanthostemon crenulatus Xanthostemon eucalyptoides Xanthostemon formosus Xanthostemon oppositifolius Xanthostemon paradoxus Xanthostemon psidioides Xanthostemon umbrosus Xanthostemon verticillatus Xanthostemon whitei Xanthostemon xerophilus Xanthostemon youngii Xanthostemon 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 Baeckeol 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 |
[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 Xanthostemon chrysanthus Xanthostemon crenulatus Xanthostemon eucalyptoides Xanthostemon formosus Xanthostemon oppositifolius Xanthostemon paradoxus Xanthostemon psidioides Xanthostemon umbrosus Xanthostemon verticillatus Xanthostemon whitei Xanthostemon xerophilus Xanthostemon youngii Xanthostemon 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 Baeckeol 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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Affiner la rechercheChemistry of the australian gymnosperms part VIII. the leaf oil of prumnopitys ladei (Podocarpaceae) / Joseph J. Brophy in The journal of essential oil research, Vol. 18 N° 2 (Mars-Avril 2006)
