Process for the preparation of diacerein

Details Process for the preparation of diacerein Process for the preparation of diacerein

C - Chemistry, Metallurgy

07

C

C07C 69/16 (2006.01) C07C 69/00 (2006.01)

Patent

CA 2141247

The present invention relates to a process for the preparation of 1,8-diacetoxy-3-carboxyanthraguinone, also known as diacerein, via aloin acetylation, oxidation of the acetylated product, and purification of the raw diacerein obtained by means of crystallisation from 2-methoxyethanol or N,N-dimethylacetamide and optionally by dissolution of the corresponding salt with triethylamine in methylene chloride, followed by removal of the insoluble residue.

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