| abstract |
Compounds of the formula I, and also one of its tautomeric forms of the formula (Ia), in which R1 is halogen, trifluoromethoxy, C1-C6-alkoxy, hydroxy, pyridylmethyl or pyridylmethoxy; R2 is hydrogen, C1-C4-alkyl, C2-C5-alkenyl, benzyl, C1-C4-alkylcarbonyl, cyano-C1-C4-alkyl, C1-C4-alkoxycarbonyl-C1-C4-alkyl or phenylcarbonyl; R3 and R4 are identical or different and are, independently of each other, C1-C4-alkyl; R3 and R4 can also together be a carbocycle which is of a ring size of C4-C6 and which is linked to the quinoline system in a spiro manner; R5 and R6 are identical or different and are, independently of each other, hydrogen, C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, phenyl or C1-C4-alkoxycarbonyl; R5 and R6 can also together be a carbocycle which is of a ring size of C5-C6 and which is linked to the quinoline system via a double bond; X is oxygen, sulfur, =N-O-R7 wherein R7 is hydrogen or C1-C4-alkyl; and n is 0, 1 or 2; their optical isomers and diastereomers in pure form or in the form of their mixtures, and their addition salts. |