981-81-7Relevant articles and documents
Reliable synthesis of 9-aryl-substituted 2,6,7-trihydroxyxanthen-3-ones
Schrick, Petra,Geick, Klaus,Waldvogel, Siegfried R.
experimental part, p. 2211 - 2216 (2009/04/06)
2,6,7-Trihydroxyxanthen-3-ones are reliably prepared by a one-pot protocol using alkali peroxosulfates in the key step. NMR spectra in deuterated sodium hydroxide confirm the anticipated structures and allow the determination of the dye contents by an internal standard. Georg Thieme Verlag Stuttgart.