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US 10,227,281 B2Granted
Preparation of 2,6- and 2,7-disubstituted anthraquinone derivates
AssigneeBASF SE
InventorsDominic Riedel, Joaquim Henrique Teles, Thomas Wurm
Life of this patent
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Abstract
A composition comprising a compound of formula (Va) wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and/or, preferably and, a compound of formula, wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and wherein at least 90 weight-% of the composition consist of compounds of formula (Va) and formula (Vb).
Claims18
A process for the preparation of an anthraquinone derivative, the process comprising:
- (i) providing a mixture (A) comprising:
- a compound of formula (I)
- a compound of formula (II)
- wherein x is 1, or a compound of formula (II) wherein x is 2, or a mixture of a compound of formula (II) wherein x is 1 and a compound of formula (II) wherein x is 2, a dehydrogenation catalyst, and a liquid solvent system;
- (ii) treating the mixture (A) with an oxygen-containing gas obtaining a mixture (B) comprising a compound of formula (IIIa)
- and/or, a compound of formula (IIIb)
- wherein, in each of formula (IIIa) and (IIIb), n is 1 or 2 and wherein, in each of formula (IIIa) and (IIIb), m is 1 or 2;
- and
- (iii) treating the mixture (B), optionally after work-up, with an oxygen-containing gas, obtaining a mixture (C) comprising a compound of formula (IVa)
- and/or a compound of formula (IVb)
- wherein, in each of formula (IVa) and (IVb), n is 1 or 2 and wherein, in each of formula (IVa) and (IVb), m is 1 or 2.
8 more elements
Dependencies are inferred from the claim text.