Tetrazole derivatives and their use as potassium channel modulators

1. A tetrazole of formula (I):

wherein

—X is hydrogen, halogen, hydroxy, cyano, C 1 -C 6 -alkyl, C 1 -C 6 -haloalkyl, C 1 -C 6 alkoxy, or C 1 -C 6 haloalkoxy; and

—Y is hydrogen, halogen, cyano, hydroxy, amino, carbamoyl, formyl, acetyl, C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -haloalkyl, C 1 -C 6 -haloalkoxy, C 1 -C 6 -cyanoalkyl, C 1 -C 6 -cyanoalkoxy, C 1 -C 6 -hydroxyalkyl, C 1 -C 6 -hydroxyalkoxy, C 1 -C 6 -thioalkoxy, C 1 -C 6 -alkylsulfinyl, C 1 -C 6 -alkylsulfonyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C1-C6-alkoxy, C 1 -C 6 -alkoxy-C 1 -C 6 -alkoxy, C 1 -C 6 -alkoxy-carbonyl-C 1 -C 6 -alkoxy, acetyl-C 1 -C 6 -alkoxy, N,N-di-C 1 -C 6 -alkylamino, N(N,N-di-C 1 -C 6 -alkylamino)-C 1 -C 6 -alkyl-carbonyl-amino, N—(C 1 C 6 -alkoxy-C 1 -C 6 -alkyl)-amino, N,N-di-C 1 -C 6 alkylamino-C 1 -C 6 alkoxy, N—C 1 C- 6 -alkylsulfonyl-amino, N,N-di-C 1 C 6 -sulfonyl-amino, amino-carbonyl-C 1 -C 6 -alkoxy, hydroxylamine-C 1 -C 6 -alkylidene, benzyl, or benzamide;

or a stereoisomer thereof.

2. The compound according to claim 1 , wherein X is hydrogen, halogen, hydroxy, cyano, C 1 -C 6 -alkoxy, or C 1 -C 6 -haloalkoxy.

3. The compound according to claim 2 , wherein X is hydrogen, fluorine, chlorine, hydroxy, cyano, methoxy, fluoromethoxy, chloromethoxy, difluoromethoxy, or dichloromethoxy.

4. The compound according to claim 1 , wherein Y is hydrogen, halogen, cyano, hydroxy, amino, carbamoyl, formyl, acetyl, C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -haloalkyl, C 1 -C 6 -haloalkoxy, C 1 -C 6 -cyanoalkoxy, C 1 -C 6 -hydroxyalkyl, C 1 -C 6 -thioalkoxy, C 1 -C 6 -alkylsulfinyl, C 1 -C 6 -alkylsulfonyl, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkoxy, C 1 -C 6 -alkoxy-C 1 -C 6 -alkoxy, C 1 -C 6 -alkoxy-carbonyl-C 1 -C 6 -alkoxy, acetyl-C 1 -C 6 -alkoxy, N,N-di-C 1 -C 6 -alkylamino, N—(N,N-di-C 1 -C 6 -alkylamino)-C 1 -C 6 -alkylamino, N—C 1 -C 6 -alkyl-carbonyl-amino, N—(C 1 -C 6 -alkoxy- C 1 -C 6 -alkyl)-amino, N,N-di- C 1 -C 6 -alkylamino-C 1 -C 6 -alkoxy, N—C 1 -C 6 -alkylsulfonyl-amino, N,N-di-C 1 -C 6 -sulfonyl-amino, amino-carbonyl-C 1 -C 6 -alkoxy, hydroxylamine-C 1 -C 6 -alkylidene, benzyl, or benzamide.

5. The compound according to claim 4 , wherein Y is halogen, cyano, amino, formyl, C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -haloalkyl, C 1 -C 6 -haloalkoxy, C 1 -C 6 -cyanoalkoxy, C 1 -C 6 -hydroxyalkyl, C 1 -C 6 -thioalkoxy, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkoxy, C 1 -C 6 -alkoxy-C 1 -C 6 -alkoxy, C 1 -C 6 -alkoxy-carbonyl-C 1 -C 6 -alkoxy, N,N-di-C 1 -C 6 -alkylamino, N—(C 1 -C 6 -alkoxy-C 1 -C 6 -alkyl)-amino, amino-carbonyl-C 1 -C 6 -alkoxy, hydroxylamine-C 1 -C 6 -alkylidene benzamide.

6. The compound according to claim 5 , wherein Y is fluorine, chlorine, cyano, amino, formyl, ethyl, methoxy, ethoxy, fluoromethoxy, difluoromethoxy, halomethoxy, cyanomethoxy, thiomethoxy, methoxy-ethoxy, hydroxylamine-methylidene, or benzamide.

7. The compound according to claim 1 that is:

-2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl }phenol;

-5-[2-(2-Ethoxyphenyl)phenyl]-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-1-(2-Fluorophenyl)-5-{2-[2-(2-methoxyethoxy)phenyl]phenyl}-1H-1,2,3,4-tetrazole;

-5-{2-[2-(Difluoromethoxy)phenyl]phenyl}-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-1-(2-Fluorophenyl)-5-(2-phenylphenyl)-1H-1,2,3,4-tetrazole;

-5-{2-[2-(Cyclopropylmethoxy)phenyl]phenyl}-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-2-(2-{2-[1-(2-Fluorophenyl)-1H -1,2,3 ,4-tetrazol-5-yl]phenyl}phenoxy)acetonitrile;

-methyl 2-(2-{2-[1-(2-fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}phenoxy)acetate;

-1-(2-Fluorophenyl)-5-{2-[2-(propan-2-yloxy)phenyl]phenyl }-1H-1,2,3,4-tetrazole;

-5-{2-[2-(Fluoromethoxy)phenyl]phenyl}-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-1-(2-Fluorophenyl)-5-[2-(2-methoxyphenyl)phenyl]-1H-1,2,3,4-tetrazole;

-1-(2-Fluorophenyl)-5-{2-[2-(rnethylsulfanyl)phenyl]phenyl}-1H-1,2,3,4-tetrazole;

-1-(2-Fluorophenyl)-5-{2-[2-(trifluoromethoxy)phenyl]phenyl}-1H-1,2,3,4-tetrazole;

-1-(2-Fluorophenyl)-5-{2-[2-(rnethoxyrnethoxy)phenyl]phenyl}-1H-1,2,3,4-tetrazole;

-2-(2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}phenoxy)acetamide;

-1-(2-Fluorophenyl)-5-[2-(2-methylphenyl)phenyl]-1H-1,2,3,4-tetrazole;

-5 -[2-(2-Ethylphenyl)phenyl]-1 -(2-fluorophenyl)-1H-1,2,3 ,4-tetrazole;

-2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}benzaldehyde;

-1-(2-Fluorophenyl)-5-{2-[2-(trifluoromethyl)phenyl]phenyl}-1H-1,2,3,4-tetrazole;

-5-[2-(2-Bromophenyl)phenyl]-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-5-[2-(2-Chlorophenyl)phenyl]-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-1 -(2-Fluorophenyl)-5-[2-(2-fluorophenyl)phenyl]-1H-1,2,3,4-tetrazole;

-2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}-N,N-dirnethylaniline;

-2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}aniline;

1-(2-Fluorophenyl)-5-{2-[2-(rnethoxymethyl)phenyl]phenyl}-1H-1,2,3,4-tetrazole;

-(2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5 -yl]phenyl}phenyl)methanol;

-(E)-N-[(2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol- 5-yl]phenyl}phenyl)methylidene]hydroxylamine;

-2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}benzonitrile;

-5-{2-[2-(Difluoromethyl)phenyl]phenyl}-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-5-{2-[2-(Fluoromethyl)phenyl]phenyl}-1-(2-fluorophenyl)-1H-1,2,3,4-tetrazole;

-2-{2-[1-(2-Fluorophenyl)-1H-1,2,3,4-tetrazol-5-yl]phenyl}-N-(2-methoxyethyl)aniline;

1-(2-Chlorophenyl)-5-[2-(2-fluorophenyl)phenyl]-1H-1,2,3,4-tetrazole;

-1 -(2-Chlorophenyl)-5- [2-(2-methoxyphenyl)phenyl]-1H-1,2,3,4-tetrazole;

-1-(2-Methoxyphenyl)-5-[2-(2-methoxyphenyl)phenyl]-1H-1,2,3,4-tetrazole;

-2-{5-[2-(2-Methoxyphenyl)phenyl]-1H-1,2,3,4-tetrazol-1-yl}phenol;

-5-[2-(2-Fluorophenyl)phenyl]-1-(2-methoxyphenyl)-1H-1,2,3,4-tetrazole;

-2-{5-[2-(2-Methoxyphenyl)phenyl]-1H-1,2,3,4-tetrazol-1-yl}benzonitrile;

-1-[2-(Difluoromethoxy)phenyl]-5-[2-(2-fluorophenyl)phenyl]-1H-1,2,3,4-tetrazole;

-1-[2-(Difluoromethoxy)phenyl]-5-[2-(2-rnethoxyphenyl)phenyl]-1H-1,2,3,4-tetrazole;

-2-(5 -{2-[2-(Difluoromethoxy)phenyl]phenyl}-1H-1,2,3,4-tetrazol-1-yl)benzonitrile; or

-1-phenyl-5-(2-phenylphenyl)-1 H-1,2,3,4-tetrazole.

8. A pharmaceutical composition comprising, as an active ingredient, a pharmaceutically effective amount of a compound according to claim 1 .