Compounds

1. A compound of Formula (I) or a pharmaceutically acceptable salt or N-oxide thereof:

wherein:

one of Z 1 and Z 2 is CH or N and the other of Z 1 and Z 2 is CH;

U is selected from the group consisting of phenyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, furanyl, imidazolyl and thiophenyl;

n is 0 or 1;

R 5 and R 6 are independently selected from the group consisting of halo, CF 3 , OCF 3 , C 1-3 alkyl, NHR 7 , NR 7A R 7B , C 1-3 alkoxy, nitro and cyano; or R 5 is —C m H 2m -A where m is 1-5 and the moiety —C m H 2m — is a straight or branched chain and A is selected from the group consisting of OH, OR 7 , OCOR 7 , OCO 2 R 7 , OCONR 7 , OPO 2 R 7 and NH 2 , where R 7 , R 7A and R 7B are each independently C 1-5 alkyl.

2. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein the compound of Formula (I) is represented by the Formula (IA) or a pharmaceutically acceptable salt or N-oxide thereof:

wherein:

one of Z 1 and Z 2 is CH or N and the other of Z 1 and Z 2 is CH;

U is selected from the group consisting of phenyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, furanyl, imidazolyl and thiophenyl;

R 5 and R 6 are independently selected from the group consisting of halo, CF 3 , OCF 3 , C 1-3 alkyl, C 1-3 alkoxy, nitro and cyano, and n is 0 or 1.

3. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein in Formula (I) U represents a group selected from the group consisting of phenyl, pyridyl, pyridazinyl, thiazolyl, and thiophenyl.

4. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein when n is 0; and R 5 represents CF 3 , OCF 3 , Cl, Br, or NO 2 .

5. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein n=1; and one of R 5 and R 6 represents Cl and the other of R 5 and R 6 represents Cl, CH 3 , C 2 H 5 , CN, CF 3 or OCF 3 .

6. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein n=1; and one of R 5 and R 6 represents F and the other of R 5 and R 6 represents Cl, CF 3 , CN, or CH 3 .

7. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein n=1; and one of R 5 and R 6 represents CH 3 and the other of R 5 and R 6 represents Br, CH 3 , CF 3 , CN or NO 2 .

8. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein R 5 represents —CH 2 —OH; n is 1; and R 6 is Cl.

9. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein U is selected from the group consisting of phenyl, pyridyl and pyridazinyl; n is 0; and R 5 is in the para position of U relative to the bond between U and the CH 2 group to which it is bonded.

10. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein U is selected from the group consisting of phenyl and pyridyl; n is 1; and one of R 5 and R 6 is in the para position, and the other of R 5 and R 6 is in the meta position of U relative to the bond between U and the CH 2 group to which it is bonded.

11. The compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof wherein the absolute stereochemistry of the compound of Formula (I) is indicated by the Formula (IB):

12. A compound which is selected from the group consisting of:

(1R)-1-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(2R)-2-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-{[4-({[6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(2R)-2-[(4-{[(3,4-dichlorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2R)-2-{[4-({[4-fluoro-3-(trifluoromethyl)phenyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

5-{[(1-{[(2R)-3,8-dioxo-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylen-2-yl]methyl}-4-piperidinyl)amino]methyl}-2-fluorobenzonitrile;

(2R)-2-[(4-{[(4-fluoro-3-methylphenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-[(4-{[(5-chloro-4-methyl-2-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-[(4-{[(5-bromo-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-[(4-{[(5,6-dimethyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

2-[(4-{[(5,6-dimethyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5,6-dichloro-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-{[4-({[4-chloro-3-(trifluoromethyl)phenyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-{[4-({[6-(trifluoromethyl)-3-pyridazinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-{[4-({[6-(trifluoromethyl)-3-pyridazinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

2-{[4-({[6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(4-chlorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(3-chlorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(4-methyl-3-nitrophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-bromo-4-methyl-2-thienyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(3,4-dimethylphenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-({4-[({4-[(trifluoromethyl)oxy]phenyl}methyl)amino]-1-piperidinyl}methyl)-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-{[4-({[4-(trifluoromethyl)phenyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(4-bromophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-[(4-{[(3,4-dichlorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

5-{[(1-{[(1R)-4,9-dioxo-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridin-1-yl]methyl}-4-piperidinyl)amino]methyl}-3-methyl-2-pyridinecarbonitrile;

2-[(4-{[(6-fluoro-5-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(4-chloro-3-methylphenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(4-bromo-2-thienyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(3,4-dichlorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(2-chloro-1,3-thiazol-5-yl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(4-nitrophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-{[4-({[3-chloro-4-(methyloxy)phenyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-bromo-2-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-bromo-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-chloro-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(3-fluoro-4-methylphenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(3,4-difluorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2R)-2-{[4-({[6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2R)-2-{[4-({[6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione hydrochloride;

(2S)-2-[(4-{[(3,4-dichlorophenyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2S)-2-{[4-({[6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

3-chloro-5-{[(1-{[(1R)-4,9-dioxo-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridin-1-yl]methyl}-4-piperidinyl)amino]methyl}-2-pyridinecarbonitrile;

3-chloro-5-{[(1-{[(1R)-4,9-dioxo-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridin-1-yl]methyl}-4-piperidinyl)amino]methyl}-2-pyridinecarbonitrile dihydrochloride;

(2R)-2-[(4-{[(5-bromo-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

2-[(4-{[(5-fluoro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2S)-2-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-[(4-{[(6-ethyl-5-fluoro-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-[(4-{[(5-bromo-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione hydrochloride;

(1R)-1-{[4-({[5-chloro-6-(hydroxymethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

2-{[4-({[4-methyl-3-(methyloxy)phenyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(1R)-1-{[4-({[6-(Trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione hydrochloride;

(1R)-1-{[4-({[5-methyl-6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-{[4-({[5-bromo-6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-{[4-({[5-chloro-6-(1-hydroxy-1-methylethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-[(4-{[(5-fluoro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-{[4-({[3-chloro-4-(hydroxymethyl)phenyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

3-chloro-5-{[(1-{[(2R)-3,8-dioxo-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylen-2-yl]methyl}-4-piperidinyl)amino]methyl}-2-pyridinecarbonitrile dihydrochloride;

(2R)-2-[(4-{[(5,6-dichloro-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2R)-2-{[4-({[5-chloro-6-(hydroxymethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione;

(2-chloro-4-{[(1-{[(1R)-4,9-dioxo-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridin-1-yl]methyl}-4-piperidinyl)amino]methyl}phenyl)methyl acetate;

(1R)-1-{[4-({[5-chloro-6-(1-hydroxyethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-[(4-{[(6-chloro-5-methyl-3-pyridazinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione;

(1R)-1-[(4-{[(6-chloro-5-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione; and

(2R)-2-{[4-({[5-methyl-6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione hydrochloride.

13. The compound of claim 12 which is (1R)-1-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione.

14. The compound of claim 12 which is (2R)-2-[(4-{[(5-chloro-6-methyl-3-pyridinyl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione.

15. The compound of claim 12 which is (1R)-1-{[4-({[6-(trifluoromethyl)-3-pyridinyl]methyl}amino)-1-piperidinyl]methyl}-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione.

16. A pharmaceutical composition comprising a compound of claim 1 , and one or more pharmaceutically acceptable carriers, excipients or diluents.

17. A method of treatment of tuberculosis in mammals, which method comprises the administration to a mammal in need of such treatment an effective amount of a compound of claim 1 .

18. A method of treatment of tuberculosis in mammals which method comprises the administration to a mammal in need of such treatment a composition comprising a) the compound of claim 1 or a pharmaceutically acceptable salt thereof or N-oxide thereof; and b) one or more pharmaceutically acceptable carriers, excipients, or diluents.

19. A process for preparing the compound of claim 1 which comprises contacting under nucleophilic displacement or reductive amination conditions an amine compound of Formula (IIA) and a compound of Formula (IIB):

wherein W is an aldehyde moiety —CH═O when the reaction is carried out under reductive amination conditions or W is —CH 2 Br when the reaction is carried out under nucleophilic displacement conditions.