Dihydropyridine derivatives for use as human neutrophil elastase inhibitors

A compound of the general formula (I)

• wherein
• A represents an aryl or heteroaryl ring,
• R1, R2 and R3 independently from each other represent hydrogen, halogen, nitro, cyano, C1-C6-alkyl, hydroxy or C1-C6-alkoxy, wherein C1-C6-alkyl and C1-C6-alkoxy can be further substituted with one to three identical or different radicals selected from the group consisting of halogen, hydroxy and C1-C4-alkoxy,
• R4 represents C1-C6-alkoxycarbonyl, C1-C6-alkenoxycarbonyl, hydroxycarbonyl, aminocarbonyl, mono- or di-C1-C4-alkylaminocarbonyl, C6-C10-arylaminocarbonyl, heteroarylcarbonyl, heterocyclylcarbonyl or cyano, wherein C1-C6-alkoxycarbonyl, mono- and di-C1-C4-alkylaminocarbonyl can be substituted with one to three identical or different radicals selected from the group consisting of hydroxy, C1-C4-alkoxy, hydroxycarbonyl, C1-C4-alkoxycarbonyl, amino, mono- and di-C1-C4-alkylamino, aminocarbonyl, mono- and di-C1-C4-alkylaminocarbonyl, C1-C4-alkylcarbonylamino, heteroaryl, heterocyclyl and tri-(C1-C6-alkyl)-silyl,
• R5 represents C1-C4-alkyl, which can be substituted with one to three identical or different radicals selected from the group consisting of halogen, hydroxy, C1-C6-alkoxy, C1-C6-alkenoxy, C1-C6-alkylthio, amino, mono- and di-C1-C6-alkylamino, hydroxycarbonyl, C1-C6-alkoxycarbonyl and the radical —O—(C1-C4)-alkyl-O—(C1-C4)-alkyl,
• or
• R5 represents C1-C6-alkoxycarbonyl,
• R6 represents cyano, aminocarbonyl, mono- or di-C1-C4-alkylaminocarbonyl, C3-C8-cycloalkylaminocarbonyl, C1-C6-alkylcarbonyl, hydroxycarbonyl, C1-C6-alkoxycarbonyl, heteroaryl, heterocyclyl, heteroarylcarbonyl or heterocyclylcarbonyl, wherein mono- and di-C1-C4-alkylaminocarbonyl, C1-C6-alkylcarbonyl, C1-C6-alkoxycarbonyl, heteroaryl, heterocyclyl, heteroarylcarbonyl and heterocyclylcarbonyl can be substituted with one to three identical or different radicals selected from the group consisting of C1-C4-alkyl, hydroxy, C1-C4-alkoxy, hydroxycarbonyl, C1-C4-alkoxycarbonyl, amino, mono- and di-C1-C4-alkylamino, aminocarbonyl, mono- and di-C1-C4-alkylaminocarbonyl, C1-C4-alkylcarbonylamino, tri-(C1-C6-alkyl)-silyl, phenyl and heteroaryl,
• R7 represents hydrogen, C1-C6-alkyl, aminocarbonyl, mono- or di-C1-C6-alkylaminocarbonyl or C1-C6-alkoxycarbonyl,
• R8 represents hydrogen or C1-C6-alkyl,
• R9 represents hydrogen, halogen, nitro, cyano, trifluoromethyl, C1-C6-alkyl, hydroxy, C1-C6-alkoxy or trifluoromethoxy, wherein C1-C6-alkyl and C1-C6-alkoxy can be further substituted with one to three identical or different radicals selected from the group consisting of hydroxy and C1-C4-alkoxy,
• and
• Y1, Y2, Y3, Y4 and Y5 independently from each other represent CH or N, wherein the ring contains either 0, 1 or 2 nitrogen atoms.