| | 1 | Author
| Elmar Flaskamp, -A, Gottfried Zimmermann, »., Gerhard Nonnenmacher, Otto Isaac | Requires cookie* | | | Title
| Untersuchungen zur Charakterisierung des Prochamazulens Matrizin aus Matricaria chamomilla L. Studies on the Characterization of the Chamazulene Precursor Matricine from Matricaria chamomilla L  | | | | Abstract
| The relative configuration of the thermolabile chamazulene precursor matricine has been established by NMR spectrometric studies. The NMR spectral data prove to be consistent with the well-known structure of the chamomile component. On the basis of our results the levorotatory natural substance moreover can be specified stereochemically as (—)-(3S*, 3aR*, 4S*, 9R*, 9aS*, 9bS*)-4-acetoxy -2,3,3a,4,5,9,9a,9b -octahy dro -9 -hydroxy -3,6,9 -trimethy lazuleno [4,5 -b ]furan -2 -one. | | | |
Reference
| Z. Naturforsch. 37b, 508—511 (1982); eingegangen am 24. November 1981 | | | |
Published
| 1982 | | | |
Keywords
| Matricaria chamomilla L, Matricine, NMR Spectra, Stereochemistry | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0508.pdf | | | | Identifier
| ZNB-1982-37b-0508 | | | | Volume
| 37 | |
| 2 | Author
| *-*, Gerhard Nonnenmacher, Gottfried Zimmermann®, Otto Isaac» | Requires cookie* | | | Title
| Elmar Flaskamp | | | | Abstract
| The stereochemistry of the bisaboloids in chamomile—with the exception of bisabolol-oxide C—has been elucidated. The in-vitro-examination of the mutual convertibüities of some bisaboloids gave evidence for the stereochemical accordance of the common chiral centres of all the bisaboloids. The absolute configurations of the remaining third asym-metric carbon atoms in bisabololoxide A and B have been determined by NMR spectro-metric studies in comparison with their unnatural semisynthetic epimers. All the stereo-genie centres of the bisabololoxides A and B, of (—)-a-bisabolol and of bisabolonoxide A turn out to be S-configurated. | | | |
Reference
| Z. Naturforsch. 36b, 1023—1030 (1981); eingegangen am 30. April 1981 | | | |
Published
| 1981 | | | |
Keywords
| Matricaria chamomilla L, Bisaboloids, 13 C NMR Spectra, Shift-Reagents | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1023.pdf | | | | Identifier
| ZNB-1981-36b-1023 | | | | Volume
| 36 | |
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