Patent ID: 6875873

Claim:
1,4-Diamino-2-(thiazol-2-yl)benzene derivatives of formula (I): wherein R1, R2, R3 and R4 independently of each other denote hydrogen, a C 1 -C 6 -alkyl, C 2 -C 4 -hydroxyalkyl, C 3 -C 4 -dihydroxyalkyl or C 2 -C 4 -alkoxy-(C 1 -C 2 )-alkyl group or R1 and R2 or R3 and R4 form a four-membered to eight-membered aliphatic ring, and at least two of the R1 to R4 groups denote hydrogen; R5 denotes hydrogen, a halogen atom, a C 1 -C 4 -alkyl, C 1 -C 4 -hydroxyalkyl or C 1 -C 4 -alkoxy group; R6 and R7 independently of each other denote hydrogen, a halogen atom, a nitro, C 1 -C 4 -alkoxy, C 1 -C 6 -alkyl, C 1 -C 4 -hydroxyalkyl or C 3 -C 4 dihydroxyalkyl group or a group of formula (II) and R8 denotes hydrogen, an amino group, a halogen atom, a nitro group or a hydroxyl group.