(+)-Isoajmaline
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Helvetica Chimica Acta, 1981, 64(1):90-96.
Die absolute Konfiguration von Macrolin, einem Abbauprodukt des Alkaloides Villalstonin 179. Mitteilung über organische Naturstoffe.[Reference:
WebLink]
METHODS AND RESULTS:
The absolute configuration of macroline (1), a degradration product of villalstonine (2), was determined. The chemical degradation of 1 gave a mixture of (–)‐(20S)‐20,21‐dihydro‐19‐desoxo‐macroline (9) and (–)‐(20R)‐20,21‐dihydro‐19‐desoxo‐macroline (10), which was related to the degradation products 9 of (+)‐ajmaline (3) and 10 of
(+)-Isoajmaline(4) of known absolute configuration. Together with the complete relative stereochemistry of 2 the absolute configuration of 2 and of the second moiety of 2, (+)‐pleiocarpamine (20), could be derived.
CONCLUSIONS:
Since the absolute configuration of the (–)‐6, 7‐dihydroaspidospermidine moiety of (+)‐pycnanthinine has been known already [15], the structure by Gorman et al. [17] represents the absolute configuration of (+)‐pycnanthinine.
