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agathosma_betulina_berg._pillans [2017/09/16 10:18]
andreas |
agathosma_betulina_berg._pillans [2017/09/16 11:12]
andreas |
| [[http://en.wikipedia.org/wiki/Agathosma_betulina]] | [[http://en.wikipedia.org/wiki/Agathosma_betulina]] |
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| "(+)-Limonene (about 10 %), (+)-menthone and (-)-isomenthone (both together about 40%) and the laevorotatory (S)(-)-pulegone are known as the main constituents, but not the impact flavour compounds, of buchu leaf oil. However, the constituents, responsible for the typical black currant odour are the diastereomeric isomers of 8-mercapto-p-menthan-3-one ([[http://www.thegoodscentscompany.com/data/rw1005051.html|buchu mercaptan]]) and [[http://www.thegoodscentscompany.com/data/rw1399191.html|its thiolacetates]]... The (1R)-configurated diastereomers emit a more intensive odour than the (1S)-configurated compounds, but the later diastereomers have been recognized to be peculiar to buchu leaf oil and reminiscent of black currant respectively." The qualitative sensory evaluation of the thiolacetates give strong and fruity odour impressions (trans-compounds more intensive than the cis-isomers). \\ | "(+)-Limonene (about 10 %), (+)-menthone and (-)-isomenthone (both together about 40%) and the laevorotatory (S)(-)-pulegone are known as the main constituents, but not the impact flavour compounds, of buchu leaf oil. However, the constituents, responsible for the typical black currant odour are the diastereomeric isomers of 8-mercapto-p-menthan-3-one ([[http://www.thegoodscentscompany.com/data/rw1005051.html|buchu mercaptan]]) and [[http://www.thegoodscentscompany.com/data/rw1399191.html|its thiolacetates]]... The (1R)-configurated diastereomers emit a more intensive odour than the (1S)-configurated compounds, but the later diastereomers have been recognized to be peculiar to buchu leaf oil and reminiscent of black currant respectively." \\ |
| | The qualitative sensory evaluation of the thiolacetates give strong and fruity odour impressions (trans-compounds more intensive than the cis-isomers). \\ |
| [Stereoisomeric flavour compounds. Part LVII: The stereoisomers of 3‐Oxo‐p‐menthane‐8‐thiol acetate, simultaneously stereoanalysed with their corresponding thiols., Köpke, T., Schmarr, H.G., Mosandl, A., Flavour and fragrance journal, Vol.7(4), 1992, 205-211] | [Stereoisomeric flavour compounds. Part LVII: The stereoisomers of 3‐Oxo‐p‐menthane‐8‐thiol acetate, simultaneously stereoanalysed with their corresponding thiols., Köpke, T., Schmarr, H.G., Mosandl, A., Flavour and fragrance journal, Vol.7(4), 1992, 205-211] |
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| {{:buchu_ingr2.jpg|}} \\ | | {{:pulegone_minus.jpg| (-)-pulegone }} \\ (-)-pulegone | {{:isomenthone_minus.jpg| (-)-isomenthone }} \\ (-)-isomenthone | {{:8mercapto_pmenthane3one.jpg| 8-mercapto-p-menthane-3-one }} \\ (1S)-8-mercapto- \\ p-menthane-3-one | {{:8acetylthio_pmenthane3one.jpg| 8-acetylthio-p-menthane-3-one }} \\ (1S)-8-acetylthio- \\ p-menthane-3-one | {{:diosphenol.jpg| diosphenol }} \\ diosphenol | {{:diosphenol_phi.jpg| ϕ-diosphenol }} \\ ϕ-diosphenol | |
| left: pulegon; center left: isomenthon (R=H), 8-mercapto-p-menthan-3-one (R=SH); center right: diosphenol; right: ϕ-diosphenol | |
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| "The chemical composition of three different buchu essential oils which were derived from Agathosma betulina, A. crenulata and an A betulina x crenulata hybrid respectively (fam. Rutaceae) was investigated by means of chromatographic and spectroscopic methods. Approximately 40 compounds, all known, were detected. A. betulina was characterized by 31% of (iso)menthone, 41% (ϕ)-diosphenol and 3% of the olfactory important cis- and trans-8-mercapto-p-menthane-3-ones. The A. crenulata oil contained very high quantities of pulegone (54%) besides considerable quantities of trans-8-acetylthio-p-menthan-3-one (7%). The hybrid showed, apart from a very high concentration of (iso)menthone (55%), an intermediate composition." \\ | "The chemical composition of three different buchu essential oils which were derived from Agathosma betulina, A. crenulata and an A betulina x crenulata hybrid respectively (fam. Rutaceae) was investigated by means of chromatographic and spectroscopic methods. Approximately 40 compounds, all known, were detected. A. betulina was characterized by 31% of (iso)menthone, 41% (ϕ)-diosphenol and 3% of the olfactory important cis- and trans-8-mercapto-p-menthane-3-ones. The A. crenulata oil contained very high quantities of pulegone (54%) besides considerable quantities of trans-8-acetylthio-p-menthan-3-one (7%). The hybrid showed, apart from a very high concentration of (iso)menthone (55%), an intermediate composition." \\ |
| [The biological activity and essential oil composition of 17 Agathosma (Rutaceae) species., Viljoen, A.M., Moolla, A., Van Vuuren, S.F., Van Zyl, R.L., Hüsnü, K., Baser, C., Trinder-Smith, T.H., The Journal of essential oil research, Vol.18, 2006, 2-16] | [The biological activity and essential oil composition of 17 Agathosma (Rutaceae) species., Viljoen, A.M., Moolla, A., Van Vuuren, S.F., Van Zyl, R.L., Hüsnü, K., Baser, C., Trinder-Smith, T.H., The Journal of essential oil research, Vol.18, 2006, 2-16] |
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| {{:barosma_betulina.jpg?500}} \\ | {{:barosma_betulina.jpg?600}} \\ |
| Köhler, F.E., Medizinal Pflanzen, vol.3, t.63 (1890) \\ | Köhler, F.E., Medizinal Pflanzen, vol.3, t.63 (1890) \\ |
| [[http://plantgenera.org/species.php?id_species=27501]] | [[http://plantgenera.org/species.php?id_species=27501]] |
