Flexirubin
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| General | ||||||||||
| Surname | Flexirubin | |||||||||
| Molecular formula | C 43 H 54 O 4 | |||||||||
| Brief description |
purple-red needles |
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| properties | ||||||||||
| Molar mass | 634.89 g mol −1 | |||||||||
| Physical state |
firmly |
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| Melting point |
174-176 ° C |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||
Flexirubin is the main pigment found within the bacterial genera Flexibacter , Flavobacterium , Chryseobacterium, and Cytophaga . It was isolated for the first time from Flexibacter elegans . In addition to flexirubin, these genera also contain carotenoids . The pigment mixture of flexirubin and carotenoids gives the colonies an intense yellow-orange color. Structurally, this bacterial pigment is a polyenecarboxylic acid chromophore that is linked via an ester bond to a phenol that has a long alkyl side chain . The total synthesis of flexirubin was described in 1977.
To detect flexirubin, 20% potassium hydroxide solution is added to the cultivated strains. A color change from yellow to red-brown indicates the presence of flexirubin. Optionally, the pigments can also be extracted with acetone and determined using chromatographic methods.
Individual evidence
- ↑ a b entry on flexirubin. In: Römpp Online . Georg Thieme Verlag, accessed on December 29, 2014.
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ↑ a b c Reichenbach, H., W. Kohl, et al. ( 1980 ). FLEXIRUBIN-TYPE PIGMENTS IN FLAVOBACTERIUM . Archives of Microbiology 126 (3): 291-293.
- ↑ a b Achenbach, H. , W. Kohl, et al. ( 1976 ). INVESTIGATIONS ON METABOLITES OF MICROORGANISMS .11. FLEXIRUBIN, A NOVEL PIGMENT FROM FLEXIBACTER-ELEGANS . Chemical Reports-Recueil 109 (7): 2490-2502.
- ↑ Achenbach, H., W. Kohl, et al. ( 1974 ). STRUCTURE OF FLEXIRUBIN . Tetrahedron Letters (30): 2555-2556.
- ↑ Achenbach, H. and J. Witzke ( 1977 ). TOTAL SYNTHESIS OF FLEXIRUBIN DIMETHYL ETHER . Angewandte Chemie International Edition in English 16 (3): 191–192.