Patent ID: 7223781

Claim:
A compound of the formula I in which R 1 is selected from: a) CONR 5 R 6 , in which R 5 and R 6 independently of one another are H or C 1 -C 6 -alkyl; b) A-CONR 5 R 6 , in which A is C 1 -C 6 -alkylene which is optionally substituted by C 1 -C 3 -alkyl-CO, and R 5 and R 6 independently of one another are H, C 1 -C 6 -alkyl or phenyl which is optionally substituted by one or 2 halogen atoms with the proviso that R 5 and R 6 are both H; c) C 1 -C 6 -alkylene-R 7 , where R 7 is NR 5 R 6 , and R 5 and R 6 independently of one another are H or C 1 -C 6 -alkyl; d) C 1 -C 6 -alkylene-CO—R 9 , where R 9 is phenyl which is substituted by halogen, or C 2 -C 6 -alkylene-CO—R 9 , where R 9 is phenyl which is optionally substituted by halogen; e) C 1 -C 6 -alkylene-NR 10 —CO—R 11 , or f) C 1 -C 6 -alkylene-NR 10 —SO 2 —R 12 , R 10 is H or C 1 -C 6 -alkyl, R 11 is naphthyl, or CH═CH-phenyl; R 12 is phenyl which optionally has 1, 2 or 3 substituents which independently of one another are selected from halogen, NO 2 , CF 3 , OC 1 -C 6 -alkyl, C 1 -C 6 -alkyl, NH 2 and NHCOC 1 -C 3 -alkyl, C 1 -C 6 -alkyl which is optionally substituted by one or two phenyl groups, or naphthyl, R 2 is H, C 1 -C 6 -alkyl or (CH 2 ) o COOH, R 3 and R 4 , which can be identical or different, arc H, OH, OC 1 -C 6 -alkyl, halogen or C 1 -C 6 -alkyl which is substituted by 1, 2 or 3 halogen atoms, where at least one of the radicals R 3 and R 4 is OH or OC 1 -C 6 -alkyl, n is 0, 1 or 2 and o is 0, 1, 2, 3 or 4, and the optical isomers and physiologically tolerable salts thereof.