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--- jasminum_grandiflorum_l [2021/01/15 08:43] – andreas
+++ jasminum_grandiflorum_l [2023/10/15 08:18] (aktuell) – andreas
@@ Zeile 14: / Zeile 14: @@
 The comparative headspace analysis of J.grandiflorum flowers showed a very interesting variation of constituents. One can easily see the drastic difference between the living and picked flowers (living/picked): 6-methyl-5-hepten-2-one (0.2/0%), (Z)-3-hexenyl acetate (0.2/0%), (Z,E)-ocimene (0.2/1.1%), benzyl alcohol (0/4%), benzyl acetate (60/40%), linalool (3/30%), indole (11/2%), cis-jasmone (3/0%), 3,5-dimethyl 2-ethylpyrazine (0/0.5%), methyl jasmonate (0.3/0%). \\
-[The chemistry of flowers, fruits and spices: live vs. dead-a new dimension in fragrance research., Mookherjee, B.D., Trenkle, R.W., Wilson, R.A., Pure and Applied Chemistry, Vol.62(7), 1990, 1357-1364] [[http://media.iupac.org/publications/pac/1990/pdf/6207x1357.pdf]]
+[Mookherjee BD et al., "Fruits and Flowers: Live vs Dead - Which do we want?", in: Nishimura, O. "Flavors and Fragrances, a world perspective." Proceedings of the 10th international congress of essential oils, fragrances and flavors, Washington, DC. Vol. 375. 1986, 415-424] \\
+[The chemistry of flowers, fruits and spices: live vs. dead-a new dimension in fragrance research., Mookherjee, B.D., Trenkle, R.W., Wilson, R.A., Pure and Applied Chemistry, Vol.62(7), 1990, 1357-1364] [[http://media.iupac.org/publications/pac/1990/pdf/6207x1357.pdf]]
 | {{:jasmone_cis.jpg| cis-jasmone }} \\ cis-jasmone | {{:jasmonate_methyl_m.jpg| methyl trans-(Z)-jasmonate }} \\ methyl trans-(Z)-jasmonate \\ ((-)-methyl jasmonate) | {{:jasmonate_methyl_epi.jpg| (+)-epi-methyl jasmonate }} \\ (+)-epi-methyl jasmonate | {{:jasmolactone_deltaminus.jpg| (-)-δ-jasmolactone}} \\ (-)-δ-jasmolactone |
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 The headspace of J.grandiflorum cultivated in Grasse contained maltol, which contributes an attractive and characteristic 'jammy' note to the flower scent. \\
 [Joulain, Daniel. "Flower scents from the Pacific." Chemistry & biodiversity 5.6 (2008): 896-909]
+The only constituents >1.5% in the vacuum headspace sample of J.officinale subsp.grandiflorum were benzyl acetate (52.2%), benzyl alcohol (3.2%), and linalool (17.3%). Interesting minor constituents were e.g. p-cresol (0.7%), methyl benzoate (0.7%), methyl salicylate (0.4%), indole (1.2), and (Z)-jasmone (0.5%). \\
+[Braun, Norbert A., et al. „Jasminum flexile Flower Absolute from India–a Detailed Comparison with Three Other Jasmine Absolutes.“ Natural product communications 4.9 (2009): 1934578×0900400917.]
 J.grandiflorum flowers yield 0.2% concrete and from that, 0.1% absolute (8 million flowers = 1000kg give 2.3kg concrete and 1kg absolute). Main components are benzyl acetate (34%), benzyl benzoate (24%), benzyl alcohol (5%), linalool (8%), cis-jasmone (3%), and 1H-indole (2.5%), which together total more than 75% (as shown by works from Albert Hesse and Friedrich Müller 1899-1904). Additional 94 trace compounds that contribute to the typical odor of jasmine absolute have been identified, like p-cresol, geraniol, (E,E)-farnesol, (+)-(R,E)-nerolidol, α-terpineol, and vanillin. The methyl jasmonates (-)-methyl jasmonate (1.7%) and (+)-epi-methyl jasmonate (0.2%; 400 times more potent then the former) comprise the odorous principle of jasmine. δ-Jasmolactone ([[http://www.thegoodscentscompany.com/data/rw1038021.html|6-[(Z)-pent-2-enyl]oxan-2-one]], 1.5%) contributes with pleasant sweet floral fruity notes to the character of jasmine absolute. \\
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 of French Jasminum grandiflorum flowers showed maltol also to be a key odorant. Conventional hexane extraction produces absolutes which contain comparatively much lower amounts of maltol (which is significantly soluble in benzene and ethanol, but only poorly solubilized in hexane). Maltol could also be detected in the headspace of living jasmine flowers, contributing to the exquisite fragrance of natural jasmine. \\
 [Nicolas Baldovini, Jean-Jacques Filippi, "Natural Fragrant Raw Materials" in: Buettner, Andrea, ed. Springer Handbook of Odor. Springer, 2017, 45; lit. cit.]
+Using a total of 14 commercial samples of J. grandiflorum flower absolutes from India, Egypt and Morocco, a composition range of the absolutes was established for the 3 main J. grandiflorum flower grower countries. The 12 main ingredients in the absolutes showed great variations: Linalool (2.0-6.9%), benzyl acetate (15.7-27.6%), indole (0.3-4.9%), (Z)-jasmone (1.2-5.7%), benzyl benzoate (8.8-25.5%), isophytol (4.7-8.2%), geranyllinalool (1.2-3.8%), methyl linoleate (1.7-4.8%), (E)-phytol (4.8-16.8%), (E)-phytyl acetate (2.9-6.8%), squalene (1.7-4.9%), 2,3-epoxy squalene (0.7-11.0%). \\
+[Braun, Norbert A., and Sherina Sim. "Jasminum grandiflorum: influence of flower processing and geographic origin on flower absolute composition." Natural Product Communications 15.10 (2020): 1934578X20960998.]
 {{:jasminum_grandiflorum.jpg?600}} \\