Documents disponibles écrits par cet auteur

Structure and properties of constituents in hexane extract of frankincense / Toshio Hasegawa in The journal of essential oil research, Vol. 24 N° 6 (Décembre 2012) 

Public ISBD [article]  in The journal of essential oil research > Vol. 24 N° 6 (Décembre 2012) . - pp. 593-598 Titre : Structure and properties of constituents in hexane extract of frankincense Type de document : texte imprimé Auteurs : Toshio Hasegawa, Auteur ; Akiko Kikuchi, Auteur ; Hideki Saitoh, Auteur Année de publication : 2014 Article en page(s) : pp. 593-598 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Frankincense  Boswellia  Diterpene  Incensole  X-ray  crystallographic  analysis  Constituents Résumé : Frankincense has a unique odor and is an important fragrance material for Japanese incense. The constituents of frankincense vary according to the species of tree from which the resin is derived. The aroma profile of the frankincense used in Japanese incense showed that the important odor components were diterpenes, and incensole and its derivatives. These compounds have not been previously recognized as important odor compounds, and the relative stereochemistry of the diterpenes has not been assigned. We investigated the stereochemical structures of these compounds through synthetic studies with respect to 2. Incensole epoxide was isolated as pure crystals, and its structure was determined by single-crystal X-ray diffraction. The stereochemistry of the diterpenes was assigned by synthetic methods. Incensole and incensole acetate in the hexane extracts gradually oxidized to their epoxides, although this was not observed in the isolated pure compounds. These results indicate that incensole epoxides are not primary constituents of frankincense, but secondary products. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.742468 [article] Structure and properties of constituents in hexane extract of frankincense [texte imprimé] / Toshio Hasegawa, Auteur ; Akiko Kikuchi, Auteur ; Hideki Saitoh, Auteur . - 2014 . - pp. 593-598. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 24 N° 6 (Décembre 2012) . - pp. 593-598 Mots-clés : Frankincense  Boswellia  Diterpene  Incensole  X-ray  crystallographic  analysis  Constituents Résumé : Frankincense has a unique odor and is an important fragrance material for Japanese incense. The constituents of frankincense vary according to the species of tree from which the resin is derived. The aroma profile of the frankincense used in Japanese incense showed that the important odor components were diterpenes, and incensole and its derivatives. These compounds have not been previously recognized as important odor compounds, and the relative stereochemistry of the diterpenes has not been assigned. We investigated the stereochemical structures of these compounds through synthetic studies with respect to 2. Incensole epoxide was isolated as pure crystals, and its structure was determined by single-crystal X-ray diffraction. The stereochemistry of the diterpenes was assigned by synthetic methods. Incensole and incensole acetate in the hexane extracts gradually oxidized to their epoxides, although this was not observed in the isolated pure compounds. These results indicate that incensole epoxides are not primary constituents of frankincense, but secondary products. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.742468