ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The structures of the main carotenoid pigments from the mutant 1-207 of Rhizobium lupini were elucidated by spectroscopic techniques (UV./VIS., CD., 270 MHz 1H-NMR., and MS.). Ten carotenoids were identified, namely β,β-carotene (1), β,β-caroten-4-one (echinenone, 2), β,β-carotene-4,4′-dione (canthaxanthin, 3), (3S)-3-hydroxy-β,β-caroten-4-one ((3S)-3-hydroxyechinenone, 4), (2R, 3R)-β,β-carotene-2,3-diol (5), (3S)-3-hydroxy-β,β-carotene-4,4′-dione ((3S)-adonirubin, 6), (2R, 3S)-2,3-dihydroxy-β,β-caroten-4-one (7), (2R, 3S)-2,3-dihydroxy-β,β-caroten-4,4′-dione (8), (2R, 3S, 2′R, 3′R)-2,3,2′,3′-tetrahydroxy-β,β-caroten-4-one (9) and the corresponding (2R, 3S, 2′R, 3′S)-4,4′-dione (10). Structures 5, 7, 8 and 10 have not been reported before. From the observed carotenoid pattern it is concluded that in this mutant the oxidation to 4-oxo compounds is favoured compared to the hydroxylation at C(3) and C(2).
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19790620807
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