EP

1. A compound having the structural formula I:

or a pharmaceutically acceptable salt, enantiomer, diastereomer, prodrug or mixture thereof, wherein,

Q is (CH 2 ) m , (CH 2 ) m C 6-10 aryl, (CH 2 ) m C 5-10 heterocyclyl, (CH 2 ) m C 3-10 heterocycloalkyl, (CH 2 ) m C 3-8 cycloalkyl, C(halo) 2 , said cycloalkyl, heterocycloalkyl, aryl or heterocyclyl unsubstituted or substituted with 1-3 groups of R a ;

X and Y CH 2 ,;

U represents H, C1-3 alkyl or is not present when W is ═O;

W represents OH or ═O, provided that U is not present when W is ═O;

R 1 represents (CH 2 ) p hydroxy, (CH 2 ) p CN, (CH 2 ) p CO 2 R 10 , (CH 2 ) n SO 3 R 6 , —(CH 2 ) p CF 2 SO 2 NH 2 , —(CH 2 ) p SO 2 NH 2 , —(CH 2 ) p CONHSO 2 R 2 , —(CH 2 ) p SO 2 NHCOR 2 , —(CH 2 ) p PO(OH) 2 , (CH 2 ) p CONHPO 2 R 6 , (CH 2 ) p CONHR 8 , (CH 2 ) p C 1-4 alkoxy, —(CH 2 ) p cycloalkyl, (CH 2 ) p C(O)CH 2 OH or (CH 2 ) n heterocyclyl, said heterocyclyl unsubstituted or substituted with 1 to 3 groups of R a and optionally containing an acidic hydroxyl group;

R 2 independently represents C 1-10 alkyl, (CH 2 ) m C 6-10 aryl, (CH 2 ) m C 5-10 heterocyclyl, (CH 2 ) m C 3-10 heterocycloalkyl, (CH 2 ) m C 3-8 cycloalkyl, O—C 1-10 alkyl, O—C 6-10 aryl, O—C 3-10 cycloalkyl, O—C 3-10 heterocycloalkyl, O—C 3-10 heterocycloalkyl, provided that when R 2 is O—C 1-10 alkyl, O—C 6-10 aryl, O—C 3-10 cycloalkyl, O—C 3-10 heterocycloalkyl, or O—C 3-10 heterocycloalkyl, R 3 and R 4 are not halogen, said alkyl, cycloalkyl, heterocycloalkyl, aryl or heterocyclyl unsubstituted or substituted with 1-3 groups of R a ;

R 3 and R 4 independently represents hydrogen, halogen, or C 1-6 alkyl, or R 3 and R 4 may be taken together to form a 3-7 membered carbon ring optionally interrupted with 1-2 heteroatoms chosen from O, S, SO, SO 2 , and NR 9 ;

R 6 and R 7 independently represents hydrogen, or C 1-4 alkyl;

R 8 represents hydrogen, acyl, or sulfonyl;

R 9 represents hydrogen, C 1-6 alkyl, said alkyl optionally substituted with 1-3 halogen, CN, OH, C 1-6 alkoxy, C 1-6 acyloxy or amino;

R 10 represents hydrogen, C 1-10 alkyl, C 3-10 cyclcoalkyl, (CH 2 )pC 6-10 aryl, (CH 2 )pC 5-10 heterocyclyl, CR 6 R 7 OC(O)O C 3-10 cycloalkyl or CR 6 R 7 OC(O)O C 1-10 alkyl;

Z represents C≡C, O, S, (C(R b ) 2 ) n , or CH═CH;

R b represents hydrogen, C1-6 alkyl or halogen;

R a represents C 1-6 alkoxy, C 1-6 alkyl, CF 3 , nitro, amino, cyano, C 1-6 alkylamino, halogen, SC 1-6 alkyl, SC 6-10 aryl, SC 5-10 heterocyclyl, CO 2 R 6 , OC 6-10 aryl, OC 5-10 heterocyclyl, CH 2 OC 1-6 alkyl, CH 2 SC 1-6 alkyl, CH 2 Oaryl, CH 2 Saryl;

--- represents a double or single bond;

p represents 0-3;

n represents 0-4; and

m represents 0-8.

2. A compound in accordance with claim 1 wherein R 1 is (CH 2 ) p CN, (CH 2 ) p CO 2 R 10 , —(CH 2 ) p PO(OH) 2 , (CH 2 ) p CONHPO 2 R 6 , (CH 2 ) p CONHR 8 , or (CH 2 ) n heterocyclyl, said heterocyclyl unsubstituted or substituted with 1 to 3 groups of R a and all other variables are as originally described.

3. A compound in accordance with claim 2 wherein Z is a bond or S.

4. A compound in accordance with claim 1 wherein R 1 is (CH 2 ) p CO 2 R 10 , X and Y are CH 2 , Z is (C(R b ) 2 ) n , Q is (CH 2 ) m , R 3 and R 4 are halogen, and R 2 is (CH 2 ) m C 6-10 aryl, said aryl unsubstituted or substituted with 1 to 3 groups of R a .

5. A compound in accordance with claim 2 wherein R 1 is (CH 2 ) m C 5-10 heterocyclyl, U is H, or C 1-3 alkyl, W is OH, Z is a bond or S, R 2 is (CH 2 ) m C 6-10 aryl, said aryl unsubstituted or substituted with 1 to 3 groups of R a , said heterocyclyl unsubstituted or substituted with 1 to 3 groups of R a and all other variables are as originally described.

6. A compound which is:

7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

yl}heptanoic acid;

7-{(2R)-2-[(3R)-4,4-difluoro-3-hydroxy-4-phenylbutyl]-6-oxopiperidin-1-yl}heptanoic acid;

7-{(2R)-2-[(3R)-3-hydroxy-4-phenylbutyl]-6-oxopiperidin-1yl}heptanoic acid;

7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoate;

(6R)-6-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-1-[6-(2H-tetraazol-5-yl)hexyl]piperidin-2-one;

5-(3-{(2R)-2-[(1E,3S)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)thiophene-2-carboxylic acid;

5-(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)thiophene-2-carboxylic acid;

(6R)-6[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-1-{3-[5-(2H-tetraazol-5-yl)thien-2-yl]propyl}piperdin-2-one;

(6R)-6-[(3R)-4,4-difluoro-3-hydroxy-4-phenylbutyl]-1-{3-[5-(2H-tetraazol-5-yl)thien-2-yl]propyl}piperidin-2-one;

isopropyl 5-(3-{(2R)-2-[(1E,3S)-3-hydroxy4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)thiophene-2-carboxylate;

isopropyl 5-(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)thiophene-2-carboxylate;

(5E)-7-{(2R)2[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}hept-5-enoic acid;

(5E)-7{(2R)-2-[(3R)4,4-difluoro-3-hydroxy-4-phenylbutyl]-6-oxopiperidin-1-yl}hept-5-enoic acid;

2-(3-{(2R)-2-[(1E,3S)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1,3-thiazole-5-carboxylic acid;

5-(3-{(2R)-2-[(1E,3S)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyi)-1,3-thiazole-2-carboxylic acid;

5-(3-{(2R)-2-[(1E,3S)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1,3-oxazole-2-carboxylic acid;

2-(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1,3-oxazole-5-carboxylic acid;

5-(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1H-imidazole-2-carboxylic acid;

2-(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1H-imidazole-5-carboxylic acid;

2-(3-{(2R)-2-[(1E,3S)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1,3-oxazole-5-carboxylic acid;

5-(3-{(2R)-2-[(1E,3S)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-1,2λ 5 ,5λ 5 -oxadiazole-2-carboxylic acid;

5-(3-{(2R)-2-[(1E,35)-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)-4H-1,2,4-triazole-3-carboxylic acid;

5-((1E)-3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}prop-1-enyl)thiophene-2-carboxylic acid;

5-(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}prop-1-ynyl)thiophene-2-carboxylic acid;

5-((1Z)-3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}prop-1-enyl)thiophene-2-carboxylic acid;

(6R)-6-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-1-{(2Z)-4-[(1H-tetraazol-5-ylmethyl)thio]but-2-enyl}piperidin-2-one;

[(4-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}but-2-ynyl)thio]acetic acid;

[((2Z)-4-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}but-2-enyl)thio]acetic acid;

[(4-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}butyl)thio]acetic acid;

(4-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}butoxy)acetic acid;

3-[(3-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}propyl)thio]propanoic acid;

7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-3-methyl-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

7-{(2R)-2-[(1E,3S)-4,4-difluoro-3-hydroxy-3-methyl-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-(2-naphthyl)but-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

(6R)-6-[(1E,3R)-4,4-difluoro-3-hydroxy-3-methyl-4-phenylbut-1-enyl]-1-[6-(1H-tetraazol-5-yl)hexyl]piperidin-2-one;

(6R)-6-[(1E,3S)-4,4-difluoro-3-hydroxy-3-methyl-4-phenylbut-1-enyl]-1-[6-(1H-tetraazol-5-yl)hexyl]piperidin-2-one;

7-{(2R)-2-[(1E,3R)-4-(1-benzothien-2-yl)-4,4-difluoro-3-hydroxybut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

(6R)-6-[(3R)-4,4-difluoro-3-hydroxy-3-methyl-4-phenylbutyl]-1-[6-(1H-tetraazol-5-yl)hexyl]piperidin-2-one;

(6R)-6-[(3S)-4,4-difluoro-3-hydroxy-3-methyl-4-phenylbutyl]-1-[6-(1H-tetraazol-5-yl)hexyl]piperidin-2-one;

7-{(2R)-2-[(1E,3R)-4-(1-benzofuran-2-yl)-4,4-difluoro-3-hydroxybut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

7-{(2R)-2-[(1E,3R)-4-(3-chlorophenyl)-4,4-difluoro-3-hydroxybut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

7-{(2R)-2-[(1E,3R)-4-(3-chlorophenyl)-4,4-difluoro-3-hydroxybut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-(3-methoxyphenyl)but-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

6[(1E)-(3R)-3-hydroxy-4-phenyl-but-1-enyl]-1-[6-(1H-tetrazol-5-yl)-hexyl]-piperidin-2-one;

7-{[(1E)-(2R)-2-(3S)-3-hydroxy-4-phenyl-but-1-enyl]-6-oxo-piperidin-1-yl}heptanoic acid;

isopropyl 7-{[(1E)-(2R)-2-(3S)-3-hydroxy-4-phenyl-but-1-enyl]-6-oxo-piperdin-1-yl}heptanoate;

isopropyl 7-{(2R)-2-[(3R)-3-hydroxy-4-phenyl-butyl]-6-oxo-piperdin-1-yl}heptanoate;

7-{[(2R)-2-(3R)-3-hydroxy-4-phenyl-butyl]-6-oxo-piperdin-1-yl}heptanoic acid;

methyl 5-{3-[(2R)-2-((1E)-(3S) 3-hydxoxy-4-phenyl-but-1-enyl)-6-oxo-piperidin-1-yl)-propyl}-thiophene-2-carboxylate;

5-{3-[(2R)-2-((1E)-(3S) 3-hydroxy-4-phenyl-but-1-enyl)-6-oxo-piperidin-1-yl]-propyl}-thiophene-2-carboxylic acid;

5-{3-[(2R)-2-((3S) 3-hydroxy-4-phenyl-butyl)-6-oxo-piperidin-1-yl]-propyl}-thiophene-2-carboxylic acid;

isopropyl 5-{3-[(2R)-2-((1E)-(3S) 3-hydroxy-4-phenyl-but-1-enyl)-6-oxo-piperidin-1-yl]-propyl}-thiophene-2-carboxylate;

isopropyl 5-{3-[(2R)-2-((3S) 3-hydroxy-4-phenyl-butyl)-6-oxo-piperidin-1-yl]-propyl}-thiophene-2-carboxylate;

6[(3R)-3-hydroxy-4-phenyl-butyl]-1-[6-(1H-tetrazol-5-yl)-hexyl]-piperidin-2-one

isopropyl 7-{(2R)-2-[(1E)-4,4-difluoro-3-oxo-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoate;

7-{(2R)-2-[(3R)-4-(3-bromophenyl)-4,4-diflouro-3-hydrobutyl]-6-oxopiperdidin-1-yl}heptanoic acid;

methyl 5-{3-[(2R)-2-((1E)-(3S) 3-hydroxy-4-phenyl-but-1-enyl)-6-oxo-piperidin-1-yl]-propyl}-thiophene-2-carboxylate;

5-{3-[(2R)-2-((3S) 3-hydroxy-4-phenyl-butyl)-6-oxo-piperidin-1-yl]-propyl}-thiophene-2-carboxylic acid;

isopropyl 5-{3-[(2R)-2-((3S) 3-hydroxy-4-phenyl-butyl)-6-oxo-piperidin-1-yl)-propyl}-thiophene-2-carboxylate;

6-[(3R)-3-hydroxy-4-phenyl-butyl]-1-[6-(1H-tetrazol-5-yl)-hexyl]-piperidin-2-one;

isopropyl (5Z)-7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-en-1-yl]-6-oxopiperidin-1-yl}hept-5-enoate;

(5Z)-7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-en-1-yl]-6-oxopiperidin-1-yl}hept-5-enoic acid;

or a pharmaceutically acceptable salt, enantiomer, diastereomer, prodrug or mixture thereof.

7. A compound according to claim 6 which is:

7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoic acid;

isopropyl 7-{(2R)-2-[(1E,3R)-4,4-difluoro-3-hydroxy-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoate;

isopropyl 7-{(2R)-2-[(1E)-4,4-difluoro-3-oxo-4-phenylbut-1-enyl]-6-oxopiperidin-1-yl}heptanoate;

7-{(2R)-2-[(3R)-4-(3-bromophenyl)-4,4-difluoro-3-hydroxybntyl]-6-oxopiperidin-1-yl}heptanoic acid;

or a pharmaceutically acceptable salt, enantiomer, diastereomer, prodrug or mixture thereof.

8. A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a compound of formula I, as recited in claim 1 .

9. A method for treating ocular hypertension or glaucoma comprising administration to a patient in need of such treatment a therapeutically effective amount of a compound of claim 1 , said compound administered in a topical formulation as a solution or suspension.

10. A method for treating macular edema or macular degeneration, treating dry eye, increasing retinal and optic nerve head blood velocity, and increasing retinal and optic nerve oxygen tension, comprising administration to a patient in need of such treatment a pharmaceutically effective amount of a compound of a compound as recited in claim 1 .

11. The method according to claim 9 in which the topical formulation optionally contains xanthan gum or gellan gum.