Patent · US Expired

Process for the preparation of 1-amino-2-carboxyanthraquinones

US5066820A · kind A · utility

1Cited by

4References

6Claims

0Family size

Assignee

BASF SE

Inventors

Reinhard Helwig · Ludwigshafen, DE
Helmut Hoch

Key dates

Filing date	Jul 12, 1990
Grant date	Nov 19, 1991
Priority date	—
Expiry date	Jul 12, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C227/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The preparation of 1-amino-2-carboxyanthraquinones I ##STR1## (X denotes hydrogen, chlorine or bromine) by oxidation, under alkaline conditions, of a 1-aminoanthraquinone substituted in the 2-position by an oxidizable carbo-organic radical followed by acidification of the reaction mixture, wherein a 1-amino-2-acetylanthraquinone II ##STR2## (Y denotes chlorine or bromine and n is equal to 0, 1 or 2) is reacted with a peroxide compound or oxygen as oxidizing agent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.