Orcein and Litmus

Orcein was separated into 14 dyes by partition chromatography. Their constitutions were determined mainly by spectroscopy and led to formulae that are derived from 7-amino-2-phenoxazone, 7-hydroxy-2-phenoxazone, and 7-amino-2-phenoxazime, and that were confirmed by syntheses. The major constituent o...

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Bibliographic Details
Published in:Biotechnic & histochemistry 2003-12, Vol.78 (6), p.289-302
Main Authors: Beecken, H, Gottschalk, E-M, v Gizycki, U, Krämer, H, Maassen, D, Matthies, H-G, Musso, H, Rathjen, C, Zdhorszky, Ui
Format: Article
Language:English
Subjects:
Coloring Agents - chemical synthesis
Coloring Agents - chemistry
Coloring Agents - isolation & purification
Histocytological Preparation Techniques
Lichens - chemistry
Oxazines - chemical synthesis
Oxazines - chemistry
Oxazines - isolation & purification
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Summary:Orcein was separated into 14 dyes by partition chromatography. Their constitutions were determined mainly by spectroscopy and led to formulae that are derived from 7-amino-2-phenoxazone, 7-hydroxy-2-phenoxazone, and 7-amino-2-phenoxazime, and that were confirmed by syntheses. The major constituent of litmus is assembled polymerically from 7-hydroxy-2-phenoxazone chromophores. The mechanism of formation is elucidated.
ISSN:1052-0295
1473-7760
DOI:10.1080/10520290410001671362