N-phenyl-(homo)piperazinyl-benzenesulfonyl or benzenesulfonamide compounds suitable for treating disorders that respond to the modulation of the serotonin 5-HT6 receptor

N-Phenyl-(homo)piperazinyl-benzenesulfonyl or benzenesulfonamide compounds of formula I

• the stereoisomers, N-oxides, tautomers and/or physiologically tolerated acid addition salts thereof;
• and the compounds of the formula I, wherein at least one of the atoms has been replaced by its stable, non-radioactive isotope,
• wherein
• X is a bond or NR4;
• R1 is selected from the group consisting of C1-C4-alkyl and fluorinated C1-C4-alkyl;
• R2 is selected from the group consisting of hydrogen and C1-C4-alkyl;
• R3 is selected from the group consisting of hydrogen, halogen, C1-C4-alkyl, fluorinated C1-C4-alkyl, C1-C4-alkoxy and fluorinated C1-C4-alkoxy;
• R4 is selected from the group consisting of hydrogen, C1-C4-alkyl and fluorinated C1-C4-alkyl;
• R5 is a group -A-[O—B]p—O—R7, wherein
• A and B are independently of each other C1-C4-alkylene or fluorinated C1-C4-alkylene;
• R7 is C1-C4-alkyl or fluorinated C1-C4-alkyl;
• and
• p is 0, 1, 2, 3, 4, 5 or 6;
• R6 is selected from the group consisting of halogen, C1-C2-alkyl, fluorinated C1-C2-alkyl, C1-C2-alkoxy and fluorinated C1-C2-alkoxy;
• m is 0, 1 or 2;
• and
• n is 1 or 2.