On the Existence of a Mono-Vinyl d-Urobilin

On the Existence of a Mono-Vinyl d-Urobilin

Chromic acid degradation of a d-urobilin, obtained after incubation of bilirubin in fecal bacterial cultures, gave methylvinylmaleimide and methylethylmaleimide. The d-urobilin, molecular weight 588, C33H40-N4O6, clearly showed the presence of both vinyl and ethyl resonances in the nuclear magnetic...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 1974-05, Vol.71 (5), p.1599-1601
Hauptverfasser: Chedekel, M., Bovey, F. A., Brewster, A. I. R., Petryka, Z. J., Weimer, M., Watson, C. J., Moscowitz, Albert, Lightner, D. A.
Format: Artikel
Sprache:eng
Schlagworte:
Acids
Chemical equilibrium
Chemical Phenomena
Chemistry
Chromium
Ethane
Feces
Hydrogen
Kinetics
Magnetic Resonance Spectroscopy
Mass
Mass spectrometers
Molecular weight
Nuclear chemistry
Nuclear magnetic resonance
Oxidation
Oxidation-Reduction
Physical Sciences: Chemistry
Urobilin
Vinyl Compounds
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Zusammenfassung:Chromic acid degradation of a d-urobilin, obtained after incubation of bilirubin in fecal bacterial cultures, gave methylvinylmaleimide and methylethylmaleimide. The d-urobilin, molecular weight 588, C33H40-N4O6, clearly showed the presence of both vinyl and ethyl resonances in the nuclear magnetic resonance spectrum. These results point unambiguously to a urobilin structure with one vinyl and one ethyl beta-substituent.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.71.5.1599