Patent ID: 7078428

Claim:
A compound of formula I in which R1 and R2 are, independently of one another, hydrogen, alkyl having 1, 2, 3 or 4 carbon atoms, alkenyl having 2, 3, 4, 5 or 6 carbon atoms, alkynyl having 2, 3, 4, 5 or 6 carbon atoms, aryl, heteroaryl, F, Cl, Br, I, NO 2 , NH 2 , alkylamino having 1, 2, 3 or carbon atoms, NRaRb, alkylcarbonylamino having 1, 2, 3 or 4 carbon atoms, OH, alkoxy having 1, 2, 3 or 4 carbon atoms, S(O) n R7, CO 2 H, alkoxycaxbonyl having 1, 2, 3 or carbon atoms, alkylcarbonyl having 1, 2, 3 or 4 carbon atoms, CONH 2 , CONRaRb, CN, polyfluoroalkyl having 1, 2, 3 or 4 carbon atoms, polyfluoroalkoxy having 1, 2 or 3 carbon atoms or SO 3 H; R1 and R2 themselves optionally being substituted by a linear or branched alkyl group having 1, 2, 3 or 4 carbon atoms; wherein n is zero, 1 or 2; R3 is hydrogen, aryl, heteroaryl, a group of the Alk-R8 type or cycloalkyl having 3, 4, 5, 6, 7 or 8 carbon atoms, in which cycloalkyl is optionally substituted by one or more substituents selected from the group F, Cl, Br or I, Alk is alkyl having of 1, 2, 3, 4 or 5 carbon atoms in a line or branched chain, R8 is hydrogen, cycloalkyl having 3, 4, 5, 6, 7 or 8 carbon atoms, polyfluoroaflryl having 1, 2, 3 or 4 carbon atoms, aryl, heteroaryl, OH, alkoxy having 1, 2, 3 or 4 carbon atoms, CO 2 H, CONH 2 , CONRaRb, NH 2 , alkylamino having 1, 2, 3 or 4 carbon atoms or NRaRb; R4, R5 and R6 are, independently of one another, hydrogen or a linear or branched alkyl having 1, 2, 3 or 4 carbon atoms; R7 is a linear or branched alkyl having 1, 2, 3 or 4 carbon atoms; and Ra and Rb are, independently of one another, defined as R7, or alternatively Ra and Rb form, together with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle optionally containing another hetero atom chosen from O, S or N; and a racemic mixture, enantiomer and diastereomer thereof or a mixture thereof, a tautomer thereof or a pharmaceutically acceptable salt thereof.