Preparation and purification of 1-amino-2-phenoxy-4-hydroxyanthr

Details Preparation and purification of 1-amino-2-phenoxy-4-hydroxyanthr Preparation and purification of 1-amino-2-phenoxy-4-hydroxyanthr

1993-07-22

1994-10-11

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Polycyclo ring system containing anthracene configured ring...

C07C22534

Patent

active

053548760

ABSTRACT:
Pure 1-amino-2-phenoxy-4-hydroxyanthraquinone is prepared by reacting 1-amino-2-halo-4-hydroxyanthraquinone with phenol in aqueous suspension at pH 9-13 and 130.degree.-160.degree. C., adjusting the reaction mixture pH to 9.5-11.5 after the reaction has ended, separating the reaction product from the liquid phase, and ,washing it with alkaline hypochlorite solution.

REFERENCES:
patent: 4278606 (1981-07-01), Hiller et al.
patent: 4485043 (1984-07-01), Kniel

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