Back to results
US 5,210,257 AGranted
Preparation of aryl compounds containing carboxyl and sulfonyl groups
AssigneeThe Dow Chemical Company
InventorWilliam J. Harris
Life of this patent
Estimating the term…
Abstract
Novel aryl ethers, containing both a carboxylic acid and a sulfonic acid functionality; and a process for making them are described. These difunctional aryl compounds comprise: i) a carboxylic acid group or its derivative, ii) a first aromatic group bonded to the carboxylic acid or its derivative, iii) a second aromatic group linked to the first aromatic group by a non-electron-withdrawing moiety, iv) a third aromatic group linked to the second aromatic group by a non-electron-withdrawing moiety, and v) a sulfonyl group or its derivative bonded to the third aromatic group.
Claims17
A difunctional aryl compound comprising:
- i) a carboxylic acid group or its acid halide, alkyl ester, amide, aryl ester, or thioester derivative,
- ii) a first aromatic group bonded to the carboxylic acid group or its acid halide, alkyl ester, amide, aryl ester, or thioester derivative,
- iii) a second aromatic group linked to the first aromatic group by a non-electron-withdrawing moiety which is an oxygen or sulfur atom,
- iv) a third aromatic group linked to the second aromatic group by a non-electron-withdrawing moiety which is an oxygen or sulfur atom, and
- v) a sulfonyl group or its acid halide, alkyl ester, amide, aryl ester, or thioester derivative bonded to the third aromatic group.
2 more elements
Dependencies are inferred from the claim text.