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philadelphus_coronarius_l [2021/03/16 10:36]
andreas 		philadelphus_coronarius_l [2021/04/04 14:18]
andreas
Zeile 13: Zeile 13:
 Trans-myrtanal (46%), cis-myrtanal (2.2%), myrtenal, myrtenol, indole, nopinone (5.3%), 2-aminobenzaldehyde (11%), 2-formamidobenzaldehyde and veratraldehyde have been determined in the headspace of living flowers by GC-MS analysis. Flowers from another single plant showed an entirely different composition with hugh amounts of acetophenone (20%) and indole (10%). \\ Trans-myrtanal (46%), cis-myrtanal (2.2%), myrtenal, myrtenol, indole, nopinone (5.3%), 2-aminobenzaldehyde (11%), 2-formamidobenzaldehyde and veratraldehyde have been determined in the headspace of living flowers by GC-MS analysis. Flowers from another single plant showed an entirely different composition with hugh amounts of acetophenone (20%) and indole (10%). \\
 [The composition of the headspace from fragrant flowers: Further results., Joulain D., Flavour and Fragrance J 1987; 2: 149-155] [The composition of the headspace from fragrant flowers: Further results., Joulain D., Flavour and Fragrance J 1987; 2: 149-155]
- 
-1,4-Dihydro-2-methyl-2H-3,1-bezoxazine (odor: quinoline-like) as the cyclic product of anthranilic alcohol and acetaldehyde is found in the vacuum headspace concentrate of a P.coronarius flowers variety in amounts of 0.2-1%. In pure form it cleaves acetaldehyde in perceptible amounts. \\ 
-[Volatile constituents of European bird cherry flowers (Padus avium Mill.). Surburg, H., Güntert, M., Schwarze, B.,Journal of Essential Oil Research, Vol.2(6), 1990, 307-316]  
  
 | {{:indole.jpg| indole}} \\ indole | {{:2-aminobenzaldehyde.jpg| 2-aminobenzaldehyde}} \\ 2-aminobenzaldehyde | | {{:indole.jpg| indole}} \\ indole | {{:2-aminobenzaldehyde.jpg| 2-aminobenzaldehyde}} \\ 2-aminobenzaldehyde |
 +
 +1,4-Dihydro-2-methyl-2H-3,1-benzoxazine (odor: quinoline-like) as the cyclic product of anthranilic alcohol and acetaldehyde is found in the vacuum headspace concentrate of a P.coronarius flowers variety in amounts of 0.2-1%. In pure form it cleaves acetaldehyde in perceptible amounts. \\
 +[Volatile constituents of European bird cherry flowers (Padus avium Mill.). Surburg, H., Güntert, M., Schwarze, B.,Journal of Essential Oil Research, Vol.2(6), 1990, 307-316] 
  
 Feeding experiments with 13C- and fluorine-labelled precursors revealed that the biosynthesis of 2-aminobenzaldehyde in flowers of Robinia pseudoacacia and Philadelphus coronarius is realized by transformation of anthranilic acid to indole followed by oxidative ring opening and hydrolysis of the resulting N-formyl-2-aminobenzaldehyde. \\ Feeding experiments with 13C- and fluorine-labelled precursors revealed that the biosynthesis of 2-aminobenzaldehyde in flowers of Robinia pseudoacacia and Philadelphus coronarius is realized by transformation of anthranilic acid to indole followed by oxidative ring opening and hydrolysis of the resulting N-formyl-2-aminobenzaldehyde. \\
Zeile 29: Zeile 29:
 [[http://plantgenera.org/species.php?id_species=777547]] [[http://plantgenera.org/species.php?id_species=777547]]
  
-{{:dsc01093k.jpg?800|}} \\+{{:dsc01093k.jpg}} \\
 mock orange flowers, [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]], Author: Andreas Kraska mock orange flowers, [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]], Author: Andreas Kraska
philadelphus_coronarius_l.txt · Zuletzt geändert: 2021/06/30 17:15 von andreas

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