Patent number: 6369028
Abstract: The present invention relates to compounds of the general formula (I)
in which
R1, R2, R11 and R12 represent the same or different radicals selected from the group of C1-8-alkyl, C1-8-halogenoalkyl, C3-6-cycloalkyl, aralkyl or aryl,
R3, R5, R7, R9, represent the same or different radicals selected from the group of hydrogen or straight-chain
C1-5-alkyl or branched C4-7-alkyl which may optionally be substituted by hydroxyl, C1-4-alkoxy, carboxyl
carboxamide,
imidazolyl, indolyl, guanidino, —SH
or C1-4-alkylthio, and furthermore represents aryl, aralkyl or heteroarylmethyl which may be substituted by halogen, hydroxyl, C1-4-alkyl, C1-4-alkoxy, nitro or a —NR13R14 group in which R13 and R14 independently from each other represent hydrogen or alkyl or together with the adjoining nitrogen atom forms a 5, 6 or 7-membered ring which is optionally interrupted by O, S or N and which is optionally C1-4-alkyl substituted,
R4, R6, R8, R10
Type:
Grant
Filed:
May 19, 1994
Date of Patent:
April 9, 2002
Assignee:
Bayer Aktiengesellschaft
Inventors:
Jürgen Scherkenbeck, Peter Jeschke, Hans-Georg Lerchen, Hermann Hagemann, Achim Harder, Norbert Mencke, Andrew Plant