β,β-Carotin-4-on Chemische Eigenschaften,Einsatz,Produktion Methoden
Verwenden
Echinenone may be used as an external standard for the extraction of carotenoid from plasma samples. It may also been used as an internal standard, added to samples for extraction and quantification.
Definition
ChEBI: A carotenone that is beta-carotene in which the 4 position has undergone formal oxidation to afford the corresponding ketone. Isolated as orange-red crystals, it is widely distributed in marine invertebrates.
Allgemeine Beschreibung
Echinenone is a carotenoid with a conjugated carbonyl group. Echinenone (4-keto-β-carotene) is a monoketo compound, is an intermediate between β-carotene and canthaxanthin in animals. It is one of the major carotenoids of
Anabaena sp., and also present in
Micrococcus roseus. It is located in the thylakoid membrane of
Anabaena. The conversion of β-carotene to echinenone is catalysed by CrtO, a β-carotene ketolase.
läuterung methode
Purify β,β-caroten-4-one by chromatography on partially deactivated alumina or magnesia, or by using a thin layer plate of silica gel G with 4:1 cyclohexane/diethyl ether as the developing solvent. Recrystallise it from *C6H6/MeOH. Store it in the dark at -20o. The oxime crystallises from *C6H6 with m 208o. [Beilstein 7 III 2858, 7 IV 1881.]
β,β-Carotin-4-on Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
