Pharmaceutical compounds

1. A compound of structural Formula Ia

or a pharmaceutically acceptable salt or ester thereof wherein:

is selected from a single and a double bond;

“A” is selected from the group consisting of (a) phenyl, (b) —CH 2 — phenyl, and (c) naphthalenyl;

and wherein A is optionally mono- or di-substituted with a substituent independently selected at each occurrence from the group consisting of (i) —F (ii) —Cl, (iii) —C 1-3 alkyl optionally substituted with one or more of halo, (iv) —OC 1-3 alkyl optionally substituted with one or more of halo, (v) —OC 3-6 cycloalkyl, (vi) —CH 2 OH, (vii) —COOR 1 , (viii) —CN and (ix) —NR 10 R 11 ;

X is selected from —O— and —S—;

Y is selected from —NR 6 —CHR 7 and —NR 8 —C(O)— wherein the nitrogen in Y is linked to the 5-membered heterocyclic moiety of Formula Ia and the carbon in Y is linked to the bicyclic heterocyclic moiety of Formula Ia;

R 1 is selected from the group consisting of —H, —C 1-6 alkyl and —C 3-6 cycloalkyl;

R 2 is selected from the group consisting of —H, —OH, —F, —C 1-3 alkyl, —OC 1-3 alkyl and —OC(O)—C 1-3 alkyl;

R 3 is selected from the group consisting of —H, —C 1-6 alkyl, —C 1-6 alkyl substituted with one or more of fluoro, —C 1-6 alkyl substituted with R 9 , —C 2-6 alkenyl, —C 3-6 cycloalkyl, —C 5-7 cycloalkenyl and -Z;

R 4 is selected from the group consisting of —H, —C 1-6 alkyl, —C 1-6 alkyl substituted with one or more of fluoro, —C 1-6 alkyl substituted with R 9 , —C 2-6 alkenyl, —C 3-6 cycloalkyl, —C 5-7 cycloalkenyl and -Z;

or R 3 and R 4 together represent oxo;

or R 3 and R 4 are joined together with the carbon to which they are attached to form a ring selected from the group consisting of a —C 3-6 cycloalkyl ring and a —C 5-7 cycloalkenyl ring, provided that when R 3 and R 4 are joined together with the carbon to which they are attached to form a —C 5-7 cycloalkenyl ring, there is no double bond at the C-1 position in the ring;

or R 2 , R 3 and R 4 are joined together with the carbon to which they are attached to form a cycloalkenyl ring selected from:

R 5 is absent or is a substituent selected from the group consisting of —C 1-6 alkyl, —C 3-6 cycloalkyl and halo;

R 6 is selected from the group consisting of (a) —H, (b) —C 1-4 alkyl, (c) —C(O)C 1-4 alkyl, and (d) —C(O)phenyl optionally substituted with —C 1-4 alkyl;

R 7 is selected from the group consisting of (a) —H, (b) —C 1-4 alkyl, (c) —C 3-6 cycloalkyl, and (d) phenyl optionally mono- or di-substituted with a substituent independently selected at each occurrence from the group consisting of —C 1-4 alkyl, —F and —Cl;

R 8 is selected from the group consisting of —H and —C 1-4 alkyl;

R 9 is selected from the group consisting of —COOR 1 , —C(O)H, —CN, CR 1 R 1 OH, —OR 1 , —S—C 1-6 alkyl and —S—C 3-6 cycloalkyl;

R 10 is selected from the group consisting of —H, —C 1-6 alkyl, —C 3-6 cycloalkyl and —COOR 1 ;

R 11 is selected from the group consisting of —H, —C 1-6 alkyl and —C 3-6 cycloalkyl; and

Z is selected from the group consisting of phenyl, —CH 2 — phenyl and —CH 2 -dioxolanyl,

and wherein Z is optionally mono- or di-subsituted with a substituent independently selected at each occurrence from the group consisting of (i) —F, (ii) —Cl, (iii) —C 1-3 alkyl optionally substituted with one or more of halo, (iv) —OC 1-3 alkyl optionally substituted with one or more of halo, (v) —OC 3-6 cycloalkyl, (vi) —CH 2 OH, (vii) —COOR 1 , (viii) —CN and (ix) —NR 10 R 11 .

2. The compound of claim 1 having structural Formula Ib

or a pharmaceutically acceptable salt or ester thereof wherein

R 12 is selected from the group consisting of —H and —F; and

R 13 is absent or is a substituent at the 3- or 4-position and is selected from the group consisting of (i) —F, (ii) —Cl, (iii) —C 1-3 alkyl optionally substituted with one or more of halo, (iv) —OC 1-3 alkyl optionally substituted with one or more of halo, (v) —OC 3-6 cycloalkyl, (vi) —CH 2 OH, (vii) —COOR 1 , (viii) —CN and (ix) —NR 10 R 11 .

3. The compound of claim 2 having structural Formula I

or a pharmaceutically acceptable salt or ester thereof.

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

4-(4-fluorophenyl)-7-{[{5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}(isopropyl) amino]methyl}-2H-chromen-2-one;

4-(4-fluorophenyl)-7-{[{5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino]methyl}-6-methyl-2H-chromen-2-one;

N-{[4-(4-fluorophenyl)-2-oxo-2H-chromen-7-yl]methyl}-N-{5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}acetamide;

4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-6-methyl-2H-chromen-2-one;

4-(4-fluorophenyl)-7-({[5-(1-hydroxy-1-phenylethyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[(1S)-2,2,2-trifluoro-1-hydroxy-1-methylethyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

4-(4-fluorophenyl)-7-{[{5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}(methyl)amino]methyl}-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[(1R)-2,2,2-trifluoro-1-hydroxy-1-methylethyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

3-{7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2-oxo-2H-chromen-4-yl}benzonitrile;

4-(4-fluorophenyl)-7-({[5-(2,2,3,3,3-pentafluoro-1-hydroxy-1-methylpropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-2H-chromen-2-one;

4-(4-fluorophenyl)-7-({[5-(1-hydroxycyclopentyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-2H-chromen-2-one;

(R)-6-fluoro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

(S)-6-fluoro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

6-chloro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

6-fluoro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[hydroxy(phenyl)methyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-6-fluoro-4-(4-fluorophenyl)-2H-chromen-2-one;

4-(4-fluorophenyl)-7-({[5-(1-hydroxy-1-methylpropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-2H-chromen-2-one;

7-({[5-(1-ethylpropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(4-fluorophenyl)-2H-chromen-2-one;

4-[3-(difluoromethoxy)phenyl]-7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

(+)-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

(−)-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl) 4 -[3-(trifluoromethoxy)phenyl]-2H-chromen-2-one;

6-chloro-7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-phenyl-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(3-methylphenyl)-2H-chromen-2-one;

7-(1-{[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}ethyl)-4-(4-fluorophenyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-fluoropropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(4-fluorophenyl)-2H-chromen-2-one;

7-{[(5-cyclobutyl-1,3,4-oxadiazol-2-yl)amino]methyl}-4-(4-fluorophenyl)-2H-chromen-2-one;

7-{[(5-cyclopentyl-1,3,4-oxadiazol-2-yl)amino]methyl}-4-(4-fluorophenyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(4-fluorophenyl)chroman-2-one;

7-{[[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl](methyl)amino]methyl}-4-(4-fluorophenyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(3-fluorophenyl)-2H-chromen-2-one;

4-(2,4-difluorophenyl)-7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(3-methoxyphenyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(4-methoxyphenyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-phenyl-2H-chromen-2-one;

7-[({5-[dicyclopropyl(hydroxy)methyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-4-(4-fluorophenyl)-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(4-fluorophenyl)-2H-chromen-2-one;

N-[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]-N-{[4-(4-fluorophenyl)-2-oxo-2H-chromen-7-yl]methyl}acetamide;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-thiadiazol-2-yl]amino}methyl)-4-(4-fluorophenyl)-2H-chromen-2-one;

7-{[(5-tert-butyl-1,3,4-thiadiazol-2-yl)amino]methyl}-4-(4-fluorophenyl)-2H-chromen-2-one;

7-({5-[dicyclopropyl(hydroxy)methyl]-1,3,4-thiadiazol-2-yl}thio)-4-pyridin-3-yl-2H-chromen-2-one;

7-({5-[dicyclopropyl(hydroxy)methyl]-1,3,4-thiadiazol-2-yl}thio)-4-(4-fluorophenyl)-2H-chromen-2-one;

7-{[5-(1-ethyl-1-hydroxypropyl)-1,3,4-thiadiazol-2-yl]thio}-4-(4-fluorophenyl)-2H-chromen-2-one;

or a pharmaceutically acceptable salt or ester thereof.

5. A compound of claim 1 selected from the group consisting of:

4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-6-methyl-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[(1S)-2,2,2-trifluoro-1-hydroxy-1-methylethyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

3-{7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2-oxo-2H-chromen-4-yl}benzonitrile;

6-fluoro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

6-chloro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

7-({[5-(1-ethyl-1-hydroxypropyl)-1,3,4-oxadiazol-2-yl]amino}methyl)-4-(3-fluorophenyl)-2H-chromen-2-one;

4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

(−)4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one;

or a pharmaceutically acceptable salt or ester thereof.

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

7. A pharmaceutical composition comprised of a compound of claim 1 , a lipid altering compound and a pharmaceutically acceptable carrier.

8. The compound 4(4-fluorophenyl)-7-[({5-[(1S)-2,2,2-trifluoro-1-hydroxy-1-methylethyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one.

9. A pharmaceutically acceptable salt or ester of 4-(4-fluorophenyl)-7-[({5-[(1S)-2,2,2-trifluoro-1-hydroxy-1-methylethyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one.

10. The compound 4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]- 1,3 ,4-oxadiazol-2-yl }amino)methyl]-6-methyl-2H-chromen-2-one.

11. A pharmaceutically acceptable salt or ester of 4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}amino) methyl]-6-methyl-2H-chromen-2-one.

12. The compound (−) 4-(4-fluorophenyl)-7-{[{5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl }(methyl)amino]methyl}-2H-chromen-2-one.

13. A pharmaceutically acceptable salt or ester of (−) 4-(4-fluorophenyl)-7-{[{5-[1-hydroxy-1-(trifluoromethyl)propyl]-1,3,4-oxadiazol-2-yl}(methyl)amino]methyl}-2H-chromen-2-one.

14. The compound N-{[4-(4-fluorophenyl)-2-oxo-2H-chromen-7-yl]methyl}-N-{5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl}acetamide.

15. A pharmaceutically acceptable ester of N- {[4-(4-fluorophenyl)-2-oxo-2H-chromen-7-yl]methyl}-N-{5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl}acetamide.

16. The compound (S)-6-fluoro-4-(4-fluorophenyl)-7- [({5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl}amino)methyl]-2H-chromen-2-one.

17. A pharmaceutically acceptable salt or ester of (S)-6-fluoro-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl }amino)methyl]-2H-chromen-2-one.

18. The compound (−)-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl }amino)methyl]-2H-chromen-2-one.

19. A pharmaceutically acceptable salt or ester of (−)-4-(4-fluorophenyl)-7-[({5-[1-hydroxy-1-(trifluoromethyl) propyl]-1,3,4-oxadiazol-2-yl }amino)methyl]-2H-chromen-2-one.