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US 5,476,940 AGranted
3-substituted quinoline-5-carboxylic acids
AssigneeBayer Aktiengesellschaft
InventorJurgen Stoltefuss
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Abstract
The present invention relates to novel 3-substituted quinoline-5-carboxylic acids, a process for their preparation and their use in the preparation of 4-quinolyl-dihydropyridines.
Claims7
3-substituted quinoline-5-carboxylic acids of the general formula (I) ##STR32## in which R.sup.1 represents straight-chain or branched alkyl having 2 to 8 carbon atoms, or represents a radical of the formula --A--R.sup.2,
- in which
- A denotes an oxygen or sulphur atom or an alkylidene chain having up to 3 C atoms,
- and
- R.sup.2 denotes pyridyl or phenyl, which is optionally substituted identically or differently up to 3 times by nitro, halogen, trifluoromethyl, or by straight-chain or branched alkyl, alkoxy or alkoxycarbonyl having in each case up to 8 carbon atoms, hydroxyl or carboxyl, or salts thereof.
1 more element
Dependencies are inferred from the claim text.