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  • 1
    Electronic Resource
    Electronic Resource
    New Sesquiterpene-Coumarin Ethers From Achillea and Artemisia Species (1982)
    s.l. : American Chemical Society
    Journal of natural products 45 (1982), S. 455-461 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50022a017
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  • 2
    Electronic Resource
    Electronic Resource
    Highly Unsaturated Isopentyl Amides from Achillea wilhelmsii (1987)
    s.l. : American Chemical Society
    Journal of natural products 50 (1987), S. 1100-1107 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50054a015
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Case studies of CSEARCH supported structure elucidation strategies: lupeol and a new germacrane derivative (1997)
    Springer
    Fresenius' journal of analytical chemistry 359 (1997), S. 42-45 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The NMR based structure elucidation of secondary natural products can be supported by the CSEARCH database system. In the case of the triterpene lupeol the correct identification was performed without further experiments. The structure proposal for the new germacrane derivate hydroxygermacrene-D was proven by isomer generation and subsequent ranking of the eight isomers obtained by weighted spectrum estimation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050532
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  • 4
    Electronic Resource
    Electronic Resource
    Flavonoide und Systematik der Anthemideae (Asteraceae) (1969)
    Springer
    Naturwissenschaften 56 (1969), S. 467-468 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00601083
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  • 5
    Electronic Resource
    Electronic Resource
    Albartin—a new sesquiterpene-coumarin ether fromArtemisia alba (1982)
    Springer
    Monatshefte für Chemie 113 (1982), S. 375-379 
    Details
    ISSN: 1434-4475
    Keywords: Artemisia (Compositae-Anthemideae) ; Chemosystematics ; 13C-nmr ; 1H-nmr ; Sesquiterpene-coumarin ethers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Aus den Wurzeln vonArtemisia alba wurde ein neuer Sesquiterpen-Isofraxidin Ether (Isofraxidin = 7-Hydroxy-6,8-dimethoxy-cumarin) isoliert und mittels1H-NMR,13C-NMR, MS, UV und IR charakterisiert. Albartin ist ein exo-Methylen-Isomer von 3-Acetyloxy-drimartol-isofraxidin-ether mit-OAc axial und -CH2OAr equatorial. Die chemosystematische Bedeutung dieser Verbindungsklasse innerhalb der GattungArtemisia wird kurz diskutiert.
    Notes: Abstract A new sesquiterpene isofraxidin ether (isofraxidin=7-hydroxy-6,8-dimethoxy-coumarin) was isolated from the roots ofArtemisia alba and characterized by means of1H-nmr,13C-nmr, ms, uv, and ir. Albartin is an exomethylene isomer of 3-acetyloxy-drimartol isofraxidin ether with -OAc axial and -CH2OAr equatorial. The chemosystematic significance of this class of compounds within the genusArtemisia is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799565
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  • 6
    Electronic Resource
    Electronic Resource
    Phenethylamides With an Unusual 4-Oxo-2-oxolenyl Terpenoid Side Chain from Glycosmis Species (1998)
    Springer
    Monatshefte für Chemie 129 (1998), S. 213-219 
    Details
    ISSN: 1434-4475
    Keywords: Keywords. Amides ; sulfur containing; Dihydrofuranone; Glycosmis; Rutaceae; Sulfones.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung.  Aus den lipophilen Blattextrakten von thailändischen Glycosmis-Arten wurden vier neue Amide, Glyparvin-A (1), Dihydroglyparvin (2), Khaochamid (3) und Puhinamid (4) isoliert und ihre Struktur mit spektroskopischen Methoden aufgeklärt. Gemeinsames Merkmal aller vier Amide ist eine Phenethylamineinheit mit einer C10-terpenoiden Seitenkette in para-Position, wobei dieser Geranyloxyrest weiter zu einem terminalen 4-Oxo-2-oxolen-Fünfring (einem nicht-lactonischen Dihydrofuranon) transformiert ist. Die verschiedenen Säurekomponenten der Amide sind entweder 3-Methylsulfonylpropensäure (1, 2) oder Isovalerian- (3) und Seneciosäure (4).
    Notes: Summary.  Four new amides, glyparvin-A (1), dihydroglyparvin (2), khaochamide (3), and puhinamide (4) were isolated from the lipophilic leaf extracts of Glycosmis species collected in Thailand. Their structures were elucidated by spectroscopic methods. All amides have in common a phenethylamine moiety linked with a geranyloxy rest in para-position which is further transformed to an unusual terminal 4-oxo-2-oxolene five-membered ring, a non-lactonic dihydrofuranone. The different acid parts are derived either from 3-methylsulfonylpropenoic (1, 2) or from isovaleric (3) and senecioic acid (4).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00010157
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  • 7
    Electronic Resource
    Electronic Resource
    Corrected Structure of Aglalactone Isolated from Aglaia elaeagnoidea (Meliaceae) (2000)
    Springer
    Monatshefte für Chemie 131 (2000), S. 1161-1165 
    Details
    ISSN: 1434-4475
    Keywords: Keywords. Dihydrobenzofuranone; Aglaia; Meliaceae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary.  The structure of aglalactone, a dihydrobenzofuranone from Aglaia elaeagnoidea, was revised on the basis of 2D NMR data and lanthanide induced shifts (LIS).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007060070023
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  • 8
    Electronic Resource
    Electronic Resource
    Circular dichroism of sesquiterpene-umbelliferone ethers and structure elucidation of a new derivative isolated from the gum resin “Asa Foetida” (1984)
    Springer
    Monatshefte für Chemie 115 (1984), S. 1207-1218 
    Details
    ISSN: 1434-4475
    Keywords: Chiroptical properties ; Coumarins ; Farnesiferol A and isomers ; 1H-NMR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es werden die CD-Spektren von 16 natürlich vorkommenden Sesquiterpen-Umbelliferon-Ethern, einschließlich Farnesiferol A mit allen Isomeren und allen Acetyl- bzw. 6-Oxo-Derivaten, im signifikanten Wellenlängenbereich von 350–200 nm beschrieben. Elf der Verbindungen wurden aus einem „Asa Foetida“-Präparat isoliert, fünf weitere bereits als Naturstoffe bekannte Derivate wurden mittels Acetylierung oderJones-Oxidation synthetisiert. Zusätzlich konnte eine neue Verbindung —Kamolonol (14) — isoliert werden, dessen Struktur durch zweifache Methylgruppenwanderung im Drimenyl-Sesquiterpenanteil charakterisiert ist. Die Strukturemittlung erfolgte mittels spektroskopischer Methoden (1H-NMR, MS, IR, UV und CD).
    Notes: Abstract The CD spectra of 16 naturally occurring sesquiterpene-umbelliferone ethers, including the complete set of farnesiferol A isomers with all acetates and 6-oxoderivatives, are reported over the significant wavelength range of 350–200 nm. 11 compounds were isolated from an “Asa Foetida” sample and 5 further derivatives, already known as natural products, were obtained by acetylation orJones oxidation. In addition, a new compound — kamolonol (14) — was isolated. Its structure is characterized by twofold methyl migration in the drimenol derived sesquiterpene moiety.1H-NMR, MS, IR, UV, and CD data of the new compound are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809352
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  • 9
    Electronic Resource
    Electronic Resource
    New amides fromSpilanthes oleracea (1985)
    Springer
    Monatshefte für Chemie 116 (1985), S. 273-277 
    Details
    ISSN: 1434-4475
    Keywords: Acetylenic isobutylamides ; Alkamides ; Compositae-Heliantheae ; 13C-NMR ; Reversed phase medium pressure liquid chromatography ; Spilanthes oleracea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung AusSpilanthes oleracea wurden neben dem seit langem bekannten Affinin [=Spilanthol, (2E,6Z,8E)-Deca-2,6,8-triensäureisobutylamid (1)] durch Umkehrphasen-Mitteldruckchromatographie das entsprechende 2-Methylbutylamid (2) und zwei neue acetylenische Alkamide isoliert: (Z)-Non-2-en-6,8-diinsäure-isobutylamid (3) und (Z)-Dec-2-en-6,8-diinsäure-isobutylamid (4). Die Strukturen und deren Stereochemie wurden mittels1H-NMR,13C-NMR (2 und3), MS, UV, IR und CD (2) aufgeklärt. Die chemotaxonomische Bedeutung der Verbreitung von Alkamiden innerhalb der Compositen-TribusHeliantheae wird kurz diskutiert.
    Notes: Abstract In addition to the well known affinin [=spilanthol, (2E,6Z,8E)-deca-2,6,8-trienoic acid isobutylamide (1)], the corresponding 2-methyl-butylamide (2), and two new acetylenic alkamides were isolated fromSpilanthes oleracea L. by reversed phase medium pressure chromatography: (Z)-non-2-en-6,8-diynoic acid isobutylamide (3) and (Z)-dec-2-en-6,8-diynoic acid isobutylamide (4). The structures and their stereochemistries were elucidated by1H-NMR,13C-NMR (2 and3), MS, UV, IR, and CD (2). The chemotaxonomic significance of the distribution of alkamides within theCompositae tribeHeliantheae is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00798463
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  • 10
    Electronic Resource
    Electronic Resource
    Naturally occurring sesquiterpene-coumarin ethers, VI. New sesquiterpene-isofraxidin ethers fromAchillea depressa (1984)
    Springer
    Monatshefte für Chemie 115 (1984), S. 477-483 
    Details
    ISSN: 1434-4475
    Keywords: Achillea depressa ; Compositae-Anthemideae ; Sesquiterpene-Isofraxidin Ethers ; Circular dichroism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Aus den Wurzeln vonAchillea depressa wurden zusätzlich zu bereits bekannten Sesquiterpen-Isofraxidin-Ethern drei neue Derivate isoliert: das vom bicyclischen Drimenol abgeleitete Albartol und die monocyclischen Derivate Deparnol und Acetyldeparnol. Die Verbindungen wurden mittels1H-NMR-, MS-, UV-, IR- und CD-Daten charakterisiert.
    Notes: Abstract The roots ofAchillea depressa afforded in addition to known sesquiterpene-isofraxidine ethers three new derivatives: the bicyclic drimenol derived albartol and the monocyclic derivatives deparnol and acetyldeparnol. The compounds were characterized by1H-NMR, MS, UV, IR, and CD data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00810009
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