Compounds containing an amino salicylic acid moiety linked to a sulphapyridine moiety via stable bridge
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United States of America Patent
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Apr 12, 1994
Grant Date -
N/A
app pub date -
Nov 9, 1992
filing date -
Nov 18, 1991
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Abstract
A compound of the formula Het--NR--SO.sub.2 --Ph.sup.2 --A--Ph.sup.1 (COOH)(OH) and tautomeric form, salts, solvates, C.sub.1-6 alkyl esters and pharmaceutical compositions of the compound. Ph.sup.1 and Ph.sup.2 are benzene rings with the proviso that carboxy and hydroxy are ortho to one another. Het includes an optionally substituted heterocyclic ring which includes conjugated double bonds and binds to nitrogen in NR. The compound is characterized in that A is a bridge which is stable against reduction because it is not azo, and in that R is hydrogen or lower alkyl. The invention also includes the preparation of the compound and its use as a drug, particularly for treating autoimmune diseases.
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