| 摘要 |
A novel series of 2,3-dihydro-2-oxo-1H-imidazo-¢4,5-b!quinolinyloxyalkanoic acid amides having enhanced water solubility is disclosed of the formula wherein n is 3 to 5; R1 is alkyl of 1 to 4 carbon atoms; R2 is hydrogen; R3 is 1-piperidinylethyl, 1-benzylpiperidin-4-yl, 4-(1-piperidinyl)piperidine, (1-alkyl-2-pyrrolidinyl)-alkyl where alkyl is 1 to 4 carbon atoms, 3-quinuclidinyl; R2 and R3 together with the nitrogen atom to which they are attached form 4-R4-piperazin-1-yl wherein R4 is alkyl of 1 to 7 carbon atoms, alkoxyethyl of 3 to 7 carbon atoms, pyridinyl, pyrimidinyl, tetrahydropyranylmethyl, thienylmethyl, cycloalkyl-(CH2)m where m is zero or one and cycloalkyl is 5 to 7 carbon atoms except m is zero when cycloalkyl is 7 carbon atoms, benzyl, 4-fluorobenzyl, 3-trifluoromethylbenzyl, 4-alkoxybenzyl where alkoxy is 1 to 4 carbon atoms. The compounds are cyclic AMP phosphodiesterase inhibitors and are particularly useful as inhibitors of blood platelet aggregation and/or as cardiotonic agents.
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