Substituted imidazoquinolines and imidazonaphthyridines

1. A compound of the Formula II:

wherein:

R 3 is selected from the group consisting of:

-Z-Y-R 4 , and

-Z-R 5 ;

R is selected from the group consisting of alkyl, alkoxy, hydroxy, halogen, and trifluoromethyl;

n is 0 or 1;

R 1 is selected from the group consisting of alkyl, alkoxyalkylenyl, dihydroxyalkylenyl, hydroxyalkylenyl, and alkyl substituted by a group selected from the group consisting of —NH—C(O)-alkyl, —NH—S(O) 2 -alkyl, —NH—C(O)—NH-alkyl, tetrahydropyranyl, phenoxy, 1,1-dioxidoisothiazolidin-2-yl, and 2-oxo-pyrroldin-1-yl;:

R 2 is selected from the group consisting of hydrogen, alkyl, alkoxyalkylenyl, and hydroxyalkylenyl;

Z is selected from the group consisting of a bond, and alkylene;

Y is selected from the group consisting of:

—S(O) 0-2 —,

—S(O) 2 —N(R 8 )—,

—C(R 6 )—,

—N(R 8 )-Q-,

—C(R 6 )—N(R 8 )—, and

—O—C(R 6 )—N(R 8 )—,

R 4 is selected from the group consisting of hydrogen, alkyl, and heterocyclyl wherein the alkyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, hydroxy, amino, alkylamino, dialkylamino, and in the case of alkyl, and heterocyclyl, oxo;

R 5 is selected from the group consisting of:

R 6 is ═O;

R 7 is C 2-7 alkylene;

R 8 is selected from the group consisting of hydrogen, alkyl, alkoxyalkylenyl, and hydroxyalkylenyl;

A is selected from the group consisting of —O—, —CH 2 —, —C(O)—, —S(O) 0-2 —, and —N(R 4 )—;

Q is selected from the group consisting of a bond, —C(R 6 )—, —S(O) 2 —, —C(R 6 )—N(R 8 )—W—, —S(O) 2 —N(R 8 )—, —C(R 6 )—O—, and

V is selected from the group consisting of —C(R 6 )—, —O—C(R 6 )—, —N(R 8 )—C(R 6 )—, and —S(O) 2 —;

W is a bond; and

a and b are independently integers from 1 to 6 with the proviso that a+b is ≦7;

with the proviso that when R 3 is -Z-Y-R 4 and Z is a bond, then Y is selected from the group consisting of —N(R 8 )-Q-, S(O) 0-2 , and —C(R 6 )— wherein Q is selected from the group consisting of —C(R 6 )—, S(O) 2 —, —C(R 6 )—N(R 8 )—W—; and

with the further proviso that when R 3 is -Z-R 5 , then Z is alkylene or alkenylene;

or a pharmaceutically acceptable salt thereof.

2. The compound or salt of claim 1 wherein n is 0.

3. The compound or salt of claim 1 wherein R 3 is -Z-Y-R 4 .

4. The compound or salt of claim 3 wherein Y is —N(R 8 )-Q-, and R 4 is alkyl, or heterocyclyl.

5. The compound or salt of claim 1 wherein Z is C 1-4 alkylene.

6. The compound or salt of claim 1 wherein R 3 is at the 7-position.

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

8. The compound or salt of claim 1 wherein R 1 is selected from the group consisting of 2-hydroxy-2-methylpropyl, 2-methylpropyl, propyl, ethyl, methyl, 2,3-dihydroxypropyl, 3-isopropoxypropyl, 2-phenoxyethyl, 4-[(methylsulfonyl)amino]butyl, 2-methyl-2-[(methylsulfonyl)amino]propyl, 2-(acetylamino)-2-methylpropyl, 2-{[(isopropylamino)carbonyl]amino}-2-methylpropyl, 4-{[(isopropylamino)carbonyl]amino}butyl, 4-(1,1-dioxidoisothiazolidin-2-yl)butyl, and tetrahydro-2H-pyran-4-ylmethyl.

9. The compound or salt of claim 1 wherein R 2 is selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, ethoxymethyl, methoxymethyl, 2-methoxyethyl, hydroxymethyl, and 2-hydroxyethyl.

10. The compound or salt of claim 4 wherein Q is —C(R 6 )—, —S(O) 2 —, or —C(R 6 )—N(R 8 )—.

11. The compound or salt of claim 1 wherein R 1 is selected from the group consisting of alkyl, hydroxyalkylenyl, alkoxyalkylenyl, and alkyl substituted by tetrahydropyranyl.

12. The compound or salt of claim 1 wherein R 1 is alkyl substituted by —NH—S(O) 2 -alkyl.

13. The compound or salt of claim 1 wherein R 1 is selected from the group consisting of 2-hydroxy-2-methylpropyl, 2-methylpropyl, 4-[(methylsulfonyl)amino]butyl, 2-methyl-2-[(methylsulfonyl)amino]propyl, tetrahydro-2H-pyran-4-ylmethyl, and 3-isopropoxypropyl.

14. The compound or salt of claim 11 wherein R 1 is selected from the group consisting of 2-hydroxy-2-methylpropyl, 2-methylpropyl, tetrahydro-2H-pyran-4-ylmethyl, and 3-isopropoxypropyl.

15. A compound selected from the group consisting of:

2-ethyl-7-[2-(methylsulfonyl)ethyl]-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-imidazo[4,5-c]quinolin-4-amine;

N-{3-[4-amino-2-ethyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propyl}methane sulfonamide;

N-{3-[4-amino-2-ethyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propyl}acetamide;

N-{3-[4-amino-2-ethyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propyl}-N′-isopropylurea;

3-[4-amino-2-ethyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-imidazo[4,5-c]quinolin-7-yl]-N,N-dimethylpropanamide;

or a pharmaceutically acceptable salt thereof.

16. A compound selected from the group consisting of:

3-[4-amino-2-ethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]-1-(morpholin-4-yl)propan-1-one;

1-{4-amino-7-[2-(methylsulfonyl)ethyl]-1H-imidazo[4,5-c]quinolin-1-yl}-2-methylpropan-2-ol;

3-[4-amino-2-ethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]-N,N-dimethylpropanamide;

1-{4-amino-2-(methoxymethyl)-7-[2-(methylsulfonyl)ethyl]-1H-imidazo[4,5-c]quinolin-1-yl}-2-methylpropan-2-ol;

1-{4-amino-2-(hydroxymethyl)-7-[2-(methylsulfonyl)ethyl]-1H-imidazo[4,5-c]quinolin-1-yl}-2-methylpropan-2-ol;

1-[4-amino-2-(methoxymethyl)-7-(3-morpholin-4-yl-3-oxopropyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol;

1-[4-amino-7-[3-(1,1-dioxidothiomorpholin-4-yl)-3-oxopropyl]-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol;

3-[4-amino-1-(2-hydroxy-2-methylpropyl)-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-7-yl]-N,N-dimethylpropanamide;

N-{3-[4-amino-1-(2-hydroxy-2-methylpropyl)-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propyl}methanesulfonamide;

3-[4-amino-2-(hydroxymethyl)-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]-N,N-dimethylpropanamide;

1-[4-amino-2-(hydroxymethyl)-7-(3-morpholin-4-yl-3-oxopropyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol;

3-[4-amino-1-(2-hydroxy-2-methylpropyl)-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propanamide;

1-[4-amino-7-[3-(1,1-dioxidothiomorpholin-4-yl)-3-oxopropyl]-2-(hydroxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol;

N-{3-[4-amino-1-(2-hydroxy-2-methylpropyl)-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propyl}acetamide;

N-{3-[4-amino-2-(hydroxymethyl)-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]propyl}methanesulfonamide;

N-{2-[4-amino-2-ethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]ethyl}methanesulfonamide;

1-[4-amino-2-(ethoxymethyl)-7-(3-morpholin-4-yl-3-oxopropyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol;

or a pharmaceutically acceptable salt thereof.

17. A compound selected from the group consisting of:

1-{3-[4-amino-2-(2-methoxyethyl)-8-(3-morpholin-4-yl-3-oxo-propyl)-1H-imidazo[4,5-c]quinolin-1-yl]propyl}pyrrolidin-2-one;

3-{4-amino-2-(2-methoxyethyl)-1-[3-(2-oxo-pyrrolidin-1-yl)propyl]-1H-imidazo[4,5-c]quinolin-8-yl}-N,N-dimethylpropanamide;

N-[4-amino-2-ethoxymethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]ethanesulfonamide;

or a pharmaceutically acceptable salt thereof.

18. The compound or salt of claim 4 wherein R 8 is hydrogen; Q is —C(O)—, —S(O) 2 —, or —C(O)—NH—; and R 4 is alkyl.

19. The compound or salt of claim 1 wherein R 3 is -Z-R 5 .

20. The compound or salt of claim 19 wherein Z is C 2-4 alkylene and R 5 is

wherein a and b are both 2.