Orcein and litmus

H Beecken; E-M Gottschalk; U v Gizycki; H Krämer; D Maassen; H-G Matthies; H Musso; C Rathjen; Ul Zdhorszky

doi:10.1080/10520290410001671362

Orcein and litmus

Biotech Histochem. 2003 Dec;78(6):289-302. doi: 10.1080/10520290410001671362.

Authors

H Beecken¹, E-M Gottschalk, U v Gizycki, H Krämer, D Maassen, H-G Matthies, H Musso, C Rathjen, Ul Zdhorszky

Affiliation

¹ Organic Chemistry Institute, University of Göttingen, Göttingen, Germany.

PMID: 15473576
DOI: 10.1080/10520290410001671362

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't
Review

MeSH terms

Coloring Agents / chemical synthesis
Coloring Agents / chemistry*
Coloring Agents / isolation & purification
Histocytological Preparation Techniques
Lichens / chemistry
Oxazines / chemical synthesis
Oxazines / chemistry*
Oxazines / isolation & purification

Substances

Coloring Agents
Oxazines
phenoxazinone
PAcein