astacin has been researched along with astaxanthine* in 2 studies
2 other study(ies) available for astacin and astaxanthine
| Article | Year |
|---|---|
Determination of Other Related Carotenoids Substances in Astaxanthin Crystals Extracted from Adonis amurensis.
Astaxanthin is a kind of important carotenoids with powerful antioxidation capacity and other health functions. Extracting from Adonis amurensis is a promising way to obtain natural astaxanthin. However, how to ensure the high purity and to investigate related substances in astaxanthin crystals are necessary issues. In this study, to identify possible impurities, astaxanthin crystal was first extracted from Adonis amurensis, then purified by saponification and separation. The concentration of total carotenoids in purified astaxanthin crystals was as high as 97% by weight when analyzed by UV-visible absorption spectra. After identified with TLC, HPLC and MS, besides free astaxanthin as main ingredient in the crystals, there existed four other unknown related substances, which were further investigated by HPLC/ESI/MS with the positive ion mode combining with other auxiliary reference data obtained in stress tests, at last it was confirmed that four related carotenoids substances were three structural isomers of semi-astacene and adonirubin. Topics: Adonis; Antioxidants; Canthaxanthin; Carotenoids; Chromatography, High Pressure Liquid; Chromatography, Thin Layer; Crystallization; Isomerism; Mass Spectrometry; Spectrum Analysis; Xanthophylls | 2015 |
Efficient syntheses of the keto-carotenoids canthaxanthin, astaxanthin, and astacene.
Three keto-carotenoids were prepared by the oxidation of the stable C(40) trisulfone 6, which has been used as the key compound in our beta-carotene synthesis. The first allylic oxidation to the unsaturated ketone and the second oxidation to the alpha-hydroxyketone produced the C(40) trisulfones 7 and 10, respectively. The Ramberg-Backlund reaction of the oxidized C(40) trisulfone was efficiently effected by the use of a mild base, NaOMe, in the presence of CCl(4) as a halogenating agent to give the C(40) disulfones 8 and 11. Base-promoted dehydrosulfonation reaction of the disulfone compounds produced the fully conjugated polyenes of canthaxanthin (1), astaxanthin (2), and astacene (3). Topics: beta Carotene; Canthaxanthin; Carotenoids; Combinatorial Chemistry Techniques; Molecular Structure; Oxidation-Reduction; Xanthophylls | 2005 |