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  • Organic Chemistry  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Zur Struktur eines neuen Nortriterpens aus den Bulbi von Scilla scilloides Druce1) (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 306-314 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Structure of a New Nortriterpene from the Bulbs of Scilla scilloides Druce1)From the acetone extract of the bulbs of Scilla scilloides Druce (Liliaceae) the new nortriterpene 1 has been isolated. The structure of 1 was established on the basis of chemical and spectral evidences. Besides the free state 1 was obtained by mild acid hydrolysis of the acetone-insoluble and methanol-soluble fraction suggesting the existence of 1 also in the form of its glycosides.
    Notes: Aus dem Acetonextrakt der Bulbi von Scilla scilloides Druce (Liliaceae) wurde das neue Nortriterpen 1 isoliert. Auf Grund der chemischen und spektroskopischen Untersuchungen ließ sich die Struktur von 1 ermitteln. Neben dem frei enthaltenen 1 wurde offenbar glycosidisch gebundenes 1 bei der milden Säurehydrolyse der in Aceton unlöslichen und in Methanol löslichen Fraktion erhalten.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219820214
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese von Pumiliotoxin C (1976)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1976 (1976), S. 1577-1583 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Pumiliotoxin Crac-Pumiliotoxin C (PTX-C, rac-1) is obtained in a four step stereoselective synthesis, starting from ethyl 4-methyl-2-(1-pyrrolidinyl)-l-cyclohexenecarboxylate (6) and 1-(2-bromoethyl)- butylamine hydrobromide (7), in 25 % yield. This method can easily be adapted to the syn- thesis of optically active PTX-C and of other pumiliotoxins.
    Notes: rac-Pumiliotoxin C (PTX-C, rac-1) wird in einer 4stufigen stereoselektiven Synthese, ausgehend von 4-Methyl-2-( l-pyrrolidinyl)-l-cyclohexencarbonsäure-äthylester (6) und 1-(2- Bromäthyl)butylamin-hydrobromid (7) in 25 proz. Ausbeute erhalten. Dieses Verfahren läßt sich leicht auf die Synthese von optisch aktivem PTX-C und weiteren Pumiliotoxinen übertragen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197619760906
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  • 3
    Electronic Resource
    Electronic Resource
    (20S)-3β-Hydroxy-5α-cholestan-18,20-lacton (1977)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 1285-1290 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (20S)-3β-Hydroxy-5α-cholestane 18-20-Lactone(20S)-3β-Hydroxy-5α-cholestane 18,20-lactone has been obtained in 20% over-all yield in a multistep synthesis starting from 20-oxo-5-pregnen-3β-yl acetate.
    Notes: Ausgehend von 20-Oxo-5-pregnen-3β-ylacetat wird (20S)-3β-Hydroxy-5α-cholestan-18,20-lacton über eine mehrstufige Reaktionsfolge in 20 proz. Gesamtausbeute dargestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197719770805
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