Patent ID: 7166637

Claim:
A compound of formula 1, wherein n is 1 or 2, and R 1 is —C 1-10 -alkyl, which is straight-chain or branched and substituted, once or more than once, by mono-, bi- or tricyclic saturated or monounsaturated or polyunsaturated carbocycles having 3–14 ring members, where the carbocyclic substituents are substituted once or more than once by —NO 2 and can be substituted, once or more than once, by —C 1-6 -alkyl, —OH, —NH 2 , —NHC 1-6 -alkyl, —N(C 1-6 -alkyl) 2 , —NO 2 , —CN, —F, —Cl, —Br, —I, —O—C 1-6 -alkyl, —S—C 1-6 -alkyl, —SO 3 H, —SO 2 C 1-6 -alkyl, —OSO 2 C 1-6 alkyl, —COOH, —(CO)C 1-5 -alkyl or —O(CO)C 1-5 -alkyl, and where the alkyl groups on the carbocyclic substituents can be optionally substituted, once or more than once, by —OH, —SH, —NH 2 , —F, —Cl, —Br, —I, —SO 3 H or —COOH; R 2 and R 3 (i) are, in each case independently of each other, hydrogen or —C 1-5 -alkyl, which is optionally substituted, once or more than once, by —OH, —SH, —NH 2 , —NHC 1-6 -alkyl, —N(C 1-6 -alkyl) 2 , —NO 2 , —CN, —F, —Cl, —Br, —I, —O—C 1-6 -alkyl, —S—C 1-6 -alkyl, -phenyl or -pyridyl, -phenyl, which is optionally substituted, once or more than once, by —C 1-3 -alkyl, —OH, —SH, —NH 2 , —NHC 1-3 -alkyl, —N(C 1-3 -alkyl) 2 , —NO 2 , —CN, —COOH, —COOC 1-3 -alkyl, —F —Cl, —Br, —I, —O—C 1-3 -alkyl, —S—C 1-3 -alkyl or —O(CO)—C 1-3 -alkyl, -pyridyl, which is optionally substituted, once or more than once, by —C 1-3 -alkyl, —OH, —SH, —NO 2 , —CN, —COOH, —COOC 1-3 -alkyl, —F, —Cl, —Br, —I, —O—C 1-3 -alkyl, —S—C 1-3 -alkyl or —O(CO)—C 1-3 -alkyl, where only one of R 2 and R 3 is hydrogen and where the alkyl groups on the carbocyclic and heterocyclic substituents can, for their part, be optionally substituted, once or more than once, by —OH, —SH, —NH 2 , —F, —Cl, —Br, —I, —SO 3 H, —COOH, —(CO)—C 1-5 -alkyl, or —O(CO)C 1-5 -alkyl, or (ii) NR 2 R 3 together form a saturated or unsaturated five-membered or six-membered ring which can contain up to 3 heteroatoms, preferably N, S and O, and which is optionally substituted, once or more than once, by —C 1-3 -alkyl, —OH, —SH, —NO 2 , —CN, —COOH, —COOC 1-3 -alkyl, —F, —Cl —Br, —I, —O—C 1-3 -alkyl, —S—C 1-3 -alkyl or —O(CO)—C 1-3 -alkyl, R 4 and R 5 are —H or —OH, where at least one of the two must be —OH, or salts of the compounds according to formula 1.