Patent ID: 8822702

Claim:
A compound of formula XII wherein n is a number from 1 to 4, R 1 is nitro, halogen, or cyano, R2 is hydrogen or unsubstituted or substituted alkyl, unsubstituted or substituted alkoxycarbonyl, unsubstituted or substituted arylsulfonyl, unsubstituted or substituted alkylsulfonyl, unsubstituted or substituted aryl, carbamoyl or N-mono- or N,N-disubstituted carbamoyl, silyl substituted by three moieties independently selected from unsubstituted or substituted alkyl and substituted or unsubstituted aryl, or acyl, R3 and R4 are, independently of each other, C 1 -C 4 alkyl unsubstituted or substituted by alkyl, hydroxy, mercapto, nitro, cyano, halo, halo-lower alkyl, C 6 -C 16 -aryl, C 3 -C 10 -cycloalkyl, lower alkoxy, aryl-lower alkoxy, lower alkanoyloxy, N,N-di-lower alkylamino, N-phenyl-lower alkylamino, N,N-bis(phenyl-lower alkyl)-amino, di-lower alkylamino, unsubstituted or lower alkyl substituted and/or mono- or di-oxosubstituted heterocyclylenyl or heterocyclyl, wherein C 6 -C 16 -aryl is unsubstituted or substituted by one or more moieties selected from N,N-di-lower alkylamino, N-phenyl-lower alkyl-amino, N,N-bis(phenyl-lower alkyl)-amino, and halo-lower alkyl, or R3 and R4 together form an unsubstituted alkylene bridge (thus forming a ring with the binding nitrogen) or an alkylene bridge to which a phenyl or a C 3 -C 8 -cycloalkyl ring is condensed at two vicinal carbon atoms of the alkylene bridge, and provided that R 1 is not 5-methoxy if n is 1.