Biaryl substituted azabicyclic alkane derivatives

1. A compound of formula (I),

or a pharmaceutically acceptable salt thereof, wherein

n is 1, 2 or 3;

A is N or N + —O − ;

R z is hydrogen, alkyl, cycloalkyl or arylalkyl;

L is selected from the group consisting of O, S, and —N(R a )—;

Ar 1 is a 5-membered heteroaryl group;

Ar 2 is an aryl or heteroaryl group; and

R a is selected from the group consisting of hydrogen, alkyl and alkylcarbonyl.

2. The compound of claim 1 , wherein Ar 1 is selected from the group consisting of:

wherein

R 1 , R 2 , R 3 and R 4 are independently hydrogen, acyl, acyloxy, alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxyimino, alkoxysulfonyl, alkyl, alkylsulfonyl, alkynyl, amino, carboxy, cyano, formyl, haloalkoxy, haloalkyl, halo, hydroxy, hydroxyalkyl, mercapto, nitro, thioalkoxy, —NR g R j , (NR g R j )alkyl, (NR g R j )alkoxy, (NR g R j )carbonyl, or (NR g R j )sulfonyl;

R 5 is hydrogen, acyl, alkyl, or alkylsulfonyl; and R g and R j are each independently hydrogen or alkyl or alkylcarbonyl.

3. The compound of claim 1 , wherein Ar 2 is

wherein

Z 1 , Z 2 , Z 3 , Z 4 and Z 5 are each independently nitrogen or are carbon, wherein the carbon atom is optionally substituted with a substituent selected from the group consisting of hydrogen, halogen, alkyl, —OR c , -alkyl-OR c , —NR d R e , and -alkyl-NR d R e ;

R 6 and R 7 are each independently selected from the group consisting of hydrogen, alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxyimino, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylsulfonyl, alkynyl, carboxy, cyano, formyl, haloalkoxy, haloalkyl, halo, hydroxy, hydroxyalkyl, mercapto, nitro, thioalkoxy, —NR f R g , (NR f R g )alkyl, (NR f R g )alkoxy, (NR f R g )carbonyl, and (NR f R g )sulfonyl; R a , R b , R c , R d , R e , R f , and R g are each independently hydrogen, alkyl, or alkylcarbonyl.

4. A compound of formula (I),

or a pharmaceutically acceptable salt thereof, or a tautomer thereof when R 6 or R 7 is hydroxy, wherein

n is 1, 2 or 3;

A is N or N + —O − ;

R 2 is hydrogen, alkyl, cycloalkyl or arylalkyl;

L is selected from the group consisting of O, S, and —N(R a )—;

Ar 1 is a 5-membered heteroaryl group;

Ar 2 is

wherein

Z 1 , Z 2 , Z 3 , Z 4 and Z 5 are each independently nitrogen or are carbon, wherein the carbon atom is optionally substituted with a substituent selected from the group consisting of hydrogen, halogen, alkyl, —OR c , -alkyl-OR c , —NR d R e , and -alkyl-NR d R e ;

R 6 and R 7 are each independently selected from the group consisting of hydrogen, alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxyimino, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylsulfonyl, alkynyl, carboxy, cyano, formyl, haloalkoxy, haloalkyl, halo, hydroxy, hydroxyalkyl, mercapto, nitro, thioalkoxy, —NR f R g , (NR f R g )alkyl, (NR f R g )alkoxy, (NR f R g )carbonyl, and (NR f R g )sulfonyl; R a , R b , R c , R d , R e , R f , and R g are each independently hydrogen, alkyl, or alkylcarbonyl.

5. The compound of claim 2 , wherein

A is N;

R z is H or methyl;

L is O;

n is 2; and

Ar 1 is:

6. The compound of claim 3 , wherein

A is N;

R z is H or methyl;

L is O;

n is 2;

Ar 2 is

7. The compound of claim 2 , wherein

A is N;

R z is H or methyl;

L is O;

n is 2;

Ar 1 is

Ar 2 is

8. The compound of claim 1 , selected from the group consisting of:

2-[(endo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-(1H-indol-5-yl)-thiazole;

2-[(endo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-phenyl-thiazole;

2-[(endo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-(pyridin-3-yl)-thiazole;

5-(1H-Indol-6-yl)-2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]thiazole;

5-(1H-Indol-4-yl)-2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]thiazole;

5-(Benzofuran-5-yl)-2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]thiazole;

5-(Benzo[b]thiophen-5-yl)-2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]thiazole;

5-(2-(Trifluoromethyl)-1H-indol-5-yl)-2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]thiazole;

5-(Dibenzo[b,d]thiophen-2-yl)-2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]thiazole;

2-[(exo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-(1H-indol-5-yl)-thiazole;

2-[(exo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-(1H-indol-6-yl)-thiazole;

2-[(exo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-phenyl-thiazole;

2-[(exo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-(pyridin-3-yl)-thiazole;

2-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-phenyl-1,3,4-thiadiazole;

2-(1H-Indol-5-yl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(Benzofuran-5-yl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(Benzo[b]thiophen-5-yl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(3-Fluorophenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-[(endo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-5-m-tolyl-1,3,4-thiadiazole;

2-(4-Fluorophenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(3-Chlorophenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(1H-Indol-6-yl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(1H-Indol-4-yl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(3-Cyanophenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(3-Trifluoromethylphenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy)-1,3,4-thiadiazole;

2-(4-Chlorophenyl)-5-((1R,3R,5S)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy)-1,3,4-thiadiazole;

2-(2-(Trifluoromethyl)-1H-indol-5-yl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(3-Chloro-4-fluorophenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy)-1,3,4-thiadiazole;

2-(4-(Trifluoromethyl)phenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(4-Methoxyphenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(3-Aminophenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(4-Ethylphenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole;

2-(4-Acetylphenyl)-5-[(endo)-8-methyl-8-azabicyclo[3.2.1]octan-3-yloxy]-1,3,4-thiadiazole; and

N-[(endo)-8-Methyl-8-azabicyclo[3.2.1]octan-3-yl]-5-phenyl-1,3,4-thiadiazol-2-amine.

9. A pharmaceutical composition comprising a therapeutically effective amount of a compound of claim 1 and a pharmaceutically acceptable carrier.

10. A method of selectively modulating the effects of α7 nicotinic acetylcholine receptors, α4β2 nicotinic acetylcholine receptors, or both α7 and α4β2 nicotinic acetylcholine receptors in a mammal comprising administering an effective amount of a compound of claim 1 to said mammal.

11. The method of claim 10 , wherein said compound is an agonist of at least one α7 and α4β2 nicotinic acetylcholine receptor.

12. A method of treating a α7 and α4β2 nicotinic acetylcholine receptor-mediated condition or disorder of a subject, the method comprising administering a compound of claim 1 to the subject in need thereof, wherein the α7 and α4β2 nicotinic acetylcholine receptor-mediated condition or disorder is selected from the group consisting of a cognitive disorder, attention deficit disorder, attention deficit hyperactivity disorder, Alzheimer's disease, mild cognitive impairment, senile dementia, AIDS dementia, Pick's Disease, dementia associated with Lewy bodies, dementia associated with Down's syndrome, amyotrophic lateral sclerosis, Huntington's disease, diminished CNS function associated with traumatic brain injury, acute pain, post-surgical pain, chronic pain, inflammation, inflammatory pain, neuropathic pain, infertility, need for new blood vessel growth associated with wound healing, need for new blood vessel growth associated with vascularization of skin grafts, and lack of circulation, rheumatoid arthritis, Crohn's disease, ulcerative colitis, inflammatory bowel disease, organ transplant rejection, acute immune disease associated with organ transplantation, chronic immune disease associated with organ transplantation, septic shock, toxic shock syndrome, sepsis syndrome, depression, rheumatoid spondylitis, and substance abuse.

13. The method according to claim 12 , wherein said compound is an agonist of at least one α7 nicotinic acetylcholine receptor, and wherein the method further comprises administering an atypical antipsychotic.

14. The method of claim 13 , wherein the atypical antipsychotic is at least one selected from the group consisting of clozapine, risperidone, olanzapine, quietapine, ziprasidone, zotepine, and ioperidone.

15. The method of claim 10 , further comprising administering said compound with a second composition used to treat cognitive disorders.

16. The method of claim 15 , wherein the cognitive disorder is attention deficit disorder, and the second composition comprises at least one selected from the group consisting of dextroamphetamine, levoamphetamine, dextrothreomethylphenidate, levothreomethylphenidate, amantadine, amineptine, benzphetamine, bupropion, clonidine, modafinil, pemoline, selegiline, and milnacipran.

17. The method of claim 15 , wherein the cognitive disorder is Alzheimer's disease, and the second composition comprises at least one selected from the group consisting of an acetylcholinesterase inhibitor, a NMDA antagonist, vitamin C, and vitamin E.