Quinolone derivative

1. A compound of the formula (I) or a salt thereof:

wherein:

R 1 : lower alkyl or halogen;

R 2 : —X—Y—R 20 , —X-a heterocyclic group which may be substituted, or

Ring A: aryl;

R 3 : lower alkyl, halogen, halogeno-lower alkyl, aryl which may be substituted, a heterocyclic group which may be substituted, —CO 2 R 0 , —OR 0 , or —O-halogeno-lower alkyl, wherein R 3 s can be the same or different from one another, when n is 2 or 3;

X: C 1-10 alkylene which may be substituted;

Y: *—C(O)N(R 7 )—, —O—, *—OC(O)—, *—OC(O)N(R 7 )—, —S—, —S(O)—, —S(O) 2 —, —N(R 8 )—, *—N(R 7 )C(O)—, *—N(R 7 )C(O)O—, —N(R 7 )C(O)N(R 7 )—, or *—N(R 7 )S(O) 2 —; wherein

* in Y means a binding point to X;

R 7 : the same or different, and R 0 , cycloalkyl, or lower alkylene-cycloalkyl;

R 8 : the same or different, and R 7 or —C(O)R 7 ;

R 0 : the same or different, and H or lower alkyl;

n: 0, 1, 2, or 3;

s: 0, 1, 2, or 3;

R 20 : C 1-10 alkyl, halogeno-lower alkyl, cycloalkyl which may be substituted, aryl which may be substituted, a heterocyclic group which may be substituted, lower alkylene-cycloalkyl which may be substituted, lower alkylene-aryl which may be substituted, lower alkylene-a heterocyclic group which may be substituted, lower)alkylene-N(R 0 ) 2 , —W—R 0 , —W—halogeno-lower alkyl, —W-cycloalkyl which may be substituted, —W-aryl which may be substituted, —W-a heterocyclic group which may be substituted, —W-lower alkylene-cycloalkyl which may be substituted, —W-lower alkylene-aryl which may be substituted, or —W-lower alkylene-a heterocyclic group which may be substituted;

W: *-lower alkylene-C(O)N(R 7 )—, *-lower alkylene-C(O)—, *-lower alkylene-O—, *-lower alkylene-OC(O)—, *-lower alkylene-OC(O)N(R 7 )—, *-lower alkylene-O-lower alkylene-O—, *-lower alkylene-S—, *-lower alkylene-S(O)—, *-lower alkylene-S(O) 2 —, *-lower alkylene-N(R 8 )-, *-lower alkylene-N(R 7 )C(O)—, *-lower alkylene-N(R 7 )C(O)O—, *-lower alkylene-N(R 7 )C(O)N(R 7 )—, or *-lower alkylene-N(R 7 )S(O) 2 —; wherein

* in W means a binding point to Y;

R 4 : cycloalkyl which may be substituted, aryl which may be substituted, a heterocyclic group which may be substituted, lower alkylene-cycloalkyl which may be substituted, lower alkylene-aryl which may be substituted, lower alkylene-a heterocyclic group which may be substituted, lower alkylene-OR 0 , —O-lower alkylene-OR 0 , -J-cycloalkyl which may be substituted, -J-aryl which may be substituted, -J-a heterocyclic group which may be substituted, -J-lower alkylene-cycloalkyl which may be substituted, -J-lower alkylene-aryl which may be substituted, or -J-lower alkylene-a heterocyclic group which may be substituted;

R 5 : C 1-10 alkyl, halogen, halogeno-lower alkyl, cycloalkyl which may be substituted, aryl which may be substituted, a heterocyclic group which may be substituted, —CO 2 R 0 , —CN, oxo, lower alkylene-cycloalkyl which may be substituted, lower alkylene-aryl which may be substituted, lower alkylene-a heterocyclic group which may be substituted, lower alkylene-CO 2 R 0 , -J-R 0 , -J-halogeno-lower alkyl, -J-cycloalkyl which may be substituted, -J-aryl which may be substituted, -J-a heterocyclic group which may be substituted, -J-lower alkylene-cycloalkyl which may be substituted, -J-lower alkylene-aryl which may be substituted, or -J-lower alkylene-a heterocyclic group which may be substituted, wherein R 5 s can be the same or different from one another, when s is 2 or 3; and

J: the same or different, and *—C(O)N(R 7 )—, —C(O)—, —O—, —S—, —S(O)—, —S(O) 2 —, —N(R 8 )—, *—N(R 7 )C(O)—, *—N(R 7 )C(O)O—, —N(R 7 )C(O)N(R 7 )—, *-lower alkylene-C(O)N(R 7 )—, *-lower alkylene-C(O)—, *-lower alkylene-O—, *-lower alkylene-S—, *-lower alkylene-S(O)—, *-lower alkylene-S(O) 2 —, *-lower alkylene-N(R 8 )—, *-lower alkylene-N(R 7 )C(O)—, *-lower alkylene-N(R 7 )C(O)O—, *-lower alkylene-N(R 7 )C(O)N(R 7 )—, *—O-lower alkylene-C(O)—, —O-lower alkylene-O—, or *—O-lower alkylene-N(R 8 )—; wherein

* in J means a binding point to ring A;

provided that the following compounds are excluded:

3-methyl-2-(5-phenoxypentyl)quinolin-4(1H)-one,

3-ethyl-2-(5-phenoxypentyl)quinolin-4(1H)-one,

3-methyl-2-[2-(4-phenoxypheny)ethyl]quinolin-4(1H)-one,

3-chloro-2-(piperidin-1-ylmethyl)quinolin-4(1H)-one, and

5-({4-[(3,4-dihydro-3-methyl-4-oxoquinolin-2-yl) methoxy]phenyl}methyl)thiazolidine-2,4-dione.

2. The compound or a salt thereof according to claim 1 , wherein

R 1 : lower alkyl or halogen;

R 2 : -lower alkylene-(a heterocyclic group which may be substituted with group(s) selected from Group G 1 ), or -lower alkylene-O—R 20 ;

R 3 : halogen;

n: 0 or 1;

R 20 : : cycloalkyl which may be substituted with at least one group selected from Group G 1 , aryl which may be substituted with at least one group selected from Group G 1 , or a heterocyclic group which may be substituted with at least one group selected from Group G 1 ; wherein

Group G 1 : C 1-10 alkyl, halogen, halogeno-lower alkyl, cycloalkyl which may be substituted, aryl which may be substituted, a heterocyclic group which may be substituted, —CO 2 R 0 , —CN, oxo, lower alkylene-cycloalkyl which may be substituted, lower alkylene-aryl which may be substituted, lower alkylene-a heterocyclic group which may be substituted, lower alkylene-CO 2 R 0 , -J 1 -R 0 , -J 1 -halogeno-lower alkyl, -J 1 -cycloalkyl which may be substituted, -J 1 -aryl which may be substituted, -J 1 -a heterocyclic group which may be substituted, -J 1 -lower alkylene-cycloalkyl which may be substituted, -J 1 -lower alkylene-aryl which may be substituted, and -J 1 -lower alkylene-a heterocyclic group which may be substituted; and

J 1 : —C(O)N(R 7 )—*, —C(O)—, —C(O)-lower alkylene-O—*, —O—, —S—, —S(O)—, —S(O) 2 —, —N(R 8 )—, —N(R 7 )C(O)—*, —N(R 7 )C(O)O—*, —N(R 7 )C(O)N(R 7 )—, —N(R 7 )S(O) 2 —*, —N(R 7 )C(O)-lower alkylene-O—*, -lower)alkylene-C(O)N(R 0 )—*, -lower alkylene-C(O)—*, -lower alkylene-O—*, -lower alkylene-OC(O)—*, -lower alkylene-S—*, -lower alkylene-S(O)—*, -lower alkylene-S(O) 2 —*, -lower alkylene-N(R 8 )—*, -lower alkylene-N(R 7 )C(O)—*, —O-lower alkylene-C(O)—*, —O-lower alkylene-O—, or —O-lower alkylene-N(R 8 )—*; wherein

* in J 1 means a binding point to a remnant of the group in Group G 1 .

3. The compound or a salt thereof according to claim 2 , wherein

R 1 : lower alkyl;

R 2 : -lower alkylene-(piperidyl which may be substituted with at least one group selected from Group G 1 ), or -lower alkylene-O—R 20 ; and

R 20 : a cyclohexyl which may be substituted with at least one group selected from Group G 1 , phenyl which may be substituted with at least one group selected from Group G 1 , pyridyl which may be substituted with at least one group selected from Group G 1 , tetrahydroquinolinyl which may be substituted with at least one group selected from Group G 1 , or tetrahydroisoquinolinyl which may be substituted with at least one group selected from Group G 1 .

4. The compound or a salt thereof according to claim 3 , wherein R 2 is -lower alkylene-O-(phenyl which may be substituted with at least one group selected from Group G 1 ), or -lower alkylene-O-(pyridyl which may be substituted with at least one group selected from Group G 1 ).

5. The compound or a salt thereof according to claim 4 , wherein R 2 is -lower alkylene-O-(phenyl which may be substituted with at least one group selected from Group G 1 ).

6. The compound or a salt thereof according to claim 5 , wherein R 2 is

wherein:

X 20 : lower alkylene;

R 22 : a group selected from Group G 1 ; and

R 23 : H, lower alkyl, halogen, halogeno-lower alkyl, —OR 0 , —CO 2 R 0 , —C(O)R 0 , or —CN.

7. The compound or a salt thereof according to claim 6 , wherein R 23 is H, lower alkyl, halogen, halogeno-lower alkyl, or —OR 0 .

8. The compound or a salt thereof according to claim 7 , wherein R 22 is lower alkyl, halogen, halogeno-lower alkyl, lower alkylene-a saturated heterocyclic group, lower alkylene-OR 0 , —OR 0 , —O-lower alkylene-OR 0 , —O-halogeno-lower alkyl, cycloalkyl which may be substituted with —O-lower alkylene-oxo, or —O-lower alkylene-a saturated heterocyclic group; provided that the saturated heterocyclic group may be substituted with lower alkyl, —OR 0 , —C(O)-lower alkyl, or —S(O) 2 -lower alkyl.

9. The compound or a salt thereof according to claim 8 , wherein R 22 is lower alkylene-a saturated heterocyclic group, lower alkylene-OR 0 , —O-lower alkylene-OR 0 , or —O-lower alkylene-a saturated heterocyclic group; provided that the saturated heterocyclic group is selected from oxetanyl, tetrahydrofuranyl, and tetrahydropyranyl, each of which may be substituted with lower alkyl or —OR 0 .

10. The compound or a salt thereof according to claim 7 , wherein R 22 is

wherein:

Z 1 : —C(R 0 ) 2 —or —O—;

Z 2 : a bond,)—C(R 0 ) 2 —, or) —C(R 0 ) 2 C(R 0 ) 2 —; and

Z 3 :))—C(R 0 ) 2 C(R 0 ) 2 —or —C(O)—.

11. The compound or a salt thereof according to claim 5 , wherein R 2 is

wherein:

X 20 : lower alkylene; and

R 24 : a group selected from Group G 1 .

12. The compound or a salt thereof according to claim 11 , wherein R 24 is lower alkyl, halogen, halogeno-lower alkyl, cyclohexyl which may be substituted with —OR 0 , lower alkylene-a saturated heterocyclic group, lower alkylene-OR 0 , —OR 0 , —O-lower alkylene-OR 0 , —O-halogeno-lower alkyl, or —O-lower alkylene-a saturated heterocyclic group; provided that the saturated heterocyclic group may be substituted with a lower alkyl, —OR 0 , —C(O)-lower alkyl, or —S(O) 2 -lower alkyl.

13. The compound or a salt thereof according to claim 12 , wherein R 24 is lower alkylene-a saturated heterocyclic group, or —O-lower alkylene-a saturated heterocyclic group; provided that the saturated heterocyclic group is selected from oxetanyl, tetrahydrofuranyl, and tetrahydropyranyl, each of which may be substituted with a lower alkyl or —OR 0 .

14. The compound or a salt thereof according to claim 4 , wherein R 2 is -lower alkylene-O-(pyridyl which may be substituted with at least one group selected from Group G 1 ).

15. The compound or a salt thereof according to claim 14 , wherein R 2 is

wherein:

X 20 : lower alkylene; and

R 25 : a group selected from Group G 1 .

16. The compound or a salt thereof according to claim 15 , wherein R 25 is lower alkyl, halogen, halogeno-lower alkyl, lower alkylene-a saturated heterocyclic group, lower alkylene-OR 0 , —OR 0 , —O-lower alkylene-OR 0 , —O-halogeno-lower alkyl, or —O-lower alkylene-a saturated heterocyclic group; provided that the saturated heterocyclic group may be substituted with lower alkyl or —OR 0 .

17. The compound or a salt thereof according to claim 16 , wherein R 25 is lower alkylene-a saturated heterocyclic group, lower alkylene-OR 0 , —O-lower alkylene-OR 0 , or —O-lower alkylene-a saturated heterocyclic group; provided that the saturated heterocyclic group is selected from oxetanyl, tetrahydrofuranyl, and tetrahydropyranyl, each of which may be substituted with lower alkyl or —OR 0 .

18. The compound or a salt thereof according to claim 1 , which is selected from the following group:

3-methyl-2-{[3-(tetrahydro-2H-pyran-4-ylmethoxy)phenoxy]methyl}quinolin-4(1H)-one;

N-{trans-4-[(3-methyl-4-oxo-1,4-dihydroquinolin-2-yl)methoxy]cyclohexyl}ethanesulfonamide;

3-methyl-2-[({4-[2-(tetrahydro-2H-pyran-4-yl)ethoxy]pyridin-2-yl}oxy)methyl]quinolin-4(1H)-one;

3-methyl-2-{[3-(3-oxomorpholin-4-yl)phenoxy]methyl}quinolin-4(1H)-one;

4-{4-[(3-methyl-4-oxo-1,4-dihydroquinolin-2-yl)methoxy]butoxy}benzonitrile;

2-({4-[4-(2-methoxyethyl)phenoxy]butoxy}methyl)-3-methylquinolin-4(1H)-one;

2-({3-[(1-acetylpiperidin-4-yl)methoxy]phenoxy}methyl)-3-methylquinolin-4(1H)-one;

3-methyl-2-{[3-(2-pyridin-4-ylethoxy)phenoxy]methyl}quinolin-4(1H)-one;

2-{[3-(3-hydroxy-3-methylbutoxy)phenoxy]methyl}-3-methylquinolin-4(1H)-one;

6-fluoro-3-methyl-2-({[4-(tetrahydro-2H-pyran-4-ylmethoxy)pyridin-2-yl]oxy}methyl)quinolin-4(1H)-one;

2-({[4-(3-hydroxy-3-methylbutoxy)pyridin-2-yl]oxy}methyl)-3-methylquinolin-4(1H)-one;

6-fluoro-3-methyl-2-({[1-(tetrahydro-2H-pyran-4-ylacetyl)-1,2,3,4-tetrahydroquinolin-7-yl]oxy}methyl)quinolin-4(1H)-one;

3-methyl-2-{[6-(tetrahydro-2H-pyran-4-ylmethoxy)-3,4-dihydroisoquinolin-2(1H)-yl]methyl}quinolin-4(1H)-one;

2-({[4-(3-methoxy-3-methylbutoxy)pyridin-2-yl]oxy}methyl)-3-methylquinolin-4(1H)-one;

2-[({4-[(4-hydroxy-4-methylpentyl)oxy]pyridin-2-yl}oxy)methyl]-3-methylquinolin-4(1H)-one;

2-{[3-(4-hydroxypiperidin-1-yl)phenoxy]methyl}-3-methylquinolin-4(1H)-one;

2-{[3-(4-hydroxy-4-methylpiperidin-1-yl)phenoxy]methyl}-3-methylquinolin-4(1H)-one;

N-cyclohexyl-N-{2-[(3-methyl-4-oxo-1,4-dihydroquinolin-2-yl)methoxy]ethyl}tetrahydro-2H-pyrane-4-carboxamide;

ethyl 4-[2-(3-methyl-4-oxo-1,4-dihydroquinolin-2-yl)ethyl]piperidine-1-carboxylate;

2-{2-[1-(ethylsulfonyl)piperidin-4-yl]ethyl}-3-methylquinolin-4(1H)-one; and

(3-methyl-4-oxo-1,4-dihydroquinolin-2-yl)methyl (3-phenylpropyl)carbamate.

19. A pharmaceutical composition comprising the compound or a salt thereof according to claim 1 and a pharmaceutically acceptable excipient.

20. A compound of the formula 2-({[4-(3-hydroxy-3-methylbutoxy)pyridin-2-yl]oxy}methyl)-3-methylquinolin-4(1H)-one or a salt thereof.

21. A method for treating a disease associated with NAD(P)H oxidase, comprising administering to a patient in need thereof an effective amount of a compound or a salt thereof according to claim 20 , wherein the disease is selected from the group consisting of diabetes types 1 and 2, impaired glucose tolerance, hyperlipidemia, fatty liver and diabetic complications.