HCV inhibitors

1. A compound of Formula (I):

wherein

E is —COCONR 5 R 6 , —COCF 2 CONR 5 R 6 , —COCF 2 C(O)OR 5 , —COCOR 7 , —COCF 2 R 8 , —COR 9 , or —B(OR 13 ) 2 where R 5 , R 6 , R 7 , R 9 , and each R 13 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl, or heterocyclylalkyl and R 8 is halo, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl, or heterocyclylalkyl wherein the aliphatic, alicyclic and aromatic groups in E are optionally substituted with one, two, or three R a independently selected from hydroxy, alkoxy, haloalkoxy, aryloxy, heteroaryloxy, alkylthio, arylthio, heteroarylthio, amino, monosubstituted amino, disubstituted amino, alkylsulfonyl, arylsulfonyl, carboxy, alkoxycarbonyl, alkenyloxycarbonyl, alkynyloxycarbonyl, alkenylaminocarbonyl, acylamino, aminocarbonyl, halo, or cyano and further wherein the aromatic or alicyclic ring in R a is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, carboxy, or carboxyalkyl;

R 1 is alkyl, haloalkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl or heterocyclylalkyl wherein the aliphatic, alicyclic and aromatic groups in R 1 are optionally substituted with one or two R b independently selected from hydroxy, alkoxy, aryloxy, heteroaryloxy, alkylthio, arylthio, heteroarylthio, amino, monosubstituted amino, disubstituted amino, alkylsulfonyl, arylsulfonyl, carboxy, alkoxycarbonyl, acylamino, aminocarbonyl, halo, or cyano and further wherein the aromatic ring in R b is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, cyano, carboxy, or carboxyalkyl;

X is —O—, —NH—, —S—, —SO—, or —SO 2 —;

R 3 is alkyl, haloalkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl or heterocyclylalkyl wherein the aliphatic, alicyclic and aromatic groups in R 3 are optionally substituted with one or two R c independently selected from hydroxy, alkoxy, haloalkoxy, aryloxy, heteroaryloxy, alkylthio, arylthio, heteroarylthio, amino, monosubstituted amino, disubstituted amino, alkylsulfonyl, arylsulfonyl, carboxy, alkoxycarbonyl, acylamino, aminocarbonyl, halo, or cyano and further wherein the aromatic ring in R c is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, carboxy, or carboxyalkyl;

Y is —C(O)NH—, —OC(O)NH—, —NR 14 —C(O)NH—, or —NR 14 C(O)O— where each R 14 is selected from hydrogen, alkyl optionally substituted with halo, hydroxy, alkoxy, amino, monosubstituted amino, disubstituted amino, aryl, heteroaryl or heterocyclyl;

R 2 is a group of formula (a):

where

R d1 is hydrogen, hydroxy, alkoxy, amino, alkylamino, dialkylamino, haloalkoxy or alkylsulfonyl;

R d and R d2 are independently hydrogen, alkyl, halo, alkoxy, alkvlthio, or alkylsulfonyl; or

R d1 and R d or R d1 and R d2 together with the carbon atoms to which they are attached form a 4, 5, or 6- atom heterocyclyl ring wherein one or two ring atoms are replaced by oxygen or —N— where the heterocyclyl ring is optionally substituted with one or two alkyl;

R d3 is aryl, heteroaryl, or heterocyclyl optionally substituted with halo, alkyl, cycloalkyl, cycloalkylalkyl, alkoxy, cycloalkoxy, nitro, alkylcarbonylamino, cycloalkylcarbonylamino, cycloalkylalkycarbonylamino, alkyloxycarbonylamino, amino, alkylamino, dialkylamino, or —NHCONRR′ where R is hydrogen or alkyl and R′ is hydrogen, alkyl, cycloalkyl, or cycloalkylalkyl wherein cycloalkyl and cycloalkylalkyl are optionally substituted with one, two or three alkyl; and

R 4 is selected from the group consisting of alkyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl, and heterocyclylalkyl; provided that:

(i) when R 4 is alkyl and when Y is —C(O)NH —, then R d3 is a heteroaryl ring; and

(ii) when R 4 is cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl, or heterocyclylalkyl, then R d3 is a heteroaryl ring;

wherein the aromatic or alicyclic ring in R 4 is optionally substituted with one, two, or three R f independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, carboxy, carboxyalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, alkylsulfonyl, alkylcarbonyl, aryl, aralkyl, arylsulfonyl, arylcarbonyl, aryloxycarbonyl, aminosulfonyl, aminocarbonyl, heteroaryl, heteroaralkyl, heteroarylsulfonyl, heteroarylcarbonyl, heteroaryloxycarbonyl, heterocyclyl, heterocyclylalkyl heterocyclylsulfonyl, heterocyclylcarbonyl, heterocyclyloxycarbonyl monosubstituted amino, or disubstituted amino wherein the aromatic ring in R f is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, hydroxy, carboxy, alkoxycarbonyl, monosubstituted amino, disubstituted amino, or acylamino; or

a pharmaceutically acceptable salts thereof.

2. The compound of claim 1 wherein:

R d1 is hydrogen, hydroxy, alkoxy, amino, alkylamino or dialkylamino;

R d and R d2 are independently hydrogen, alkyl, halo, alkoxy, alkylthio, or alkylsulfonyl; and R d3 is a group of formula:

optionally substituted with halo, alkyl, cycloalkyl, cycloalkylalkyl, alkoxy, cycloalkoxy, nitro, amkylcarbonylamino, cycloalkylcarbonylamino, cycloalkylalkylcarbonylamino, alkyloxycarbonylaminol amino, alkylamino, dialkylamino, or —NHCONRR′ where R is hydrogen or alkyl and R′ is hydrogen, alkyl, cycloalkyl, or cycloalkylalkyl wherein cycloalkyl and cycloalkylalkyl are optionally substituted with one, two or three alkyl.

3. The compound of claim 1 wherein:

R d1 is hydrogen, hydroxy, alkoxy, amino, alkylamino or dialkylamino;

R d and R d2 are independently hydrogen, alkyl, halo, alkoxy, alkylthio, or alkylsulfonyl; and R d3 is a group of formula:

optionally substituted with halo, alkyl, cycloalkyl, cycloalkylalkyl, alkoxy, cycloalkoxy, nitro, amkylcarbonylamino, cycloalkylcarbonylamino, cycloalkylalkylcarbonylamino, alkyloxycarbonylamino, amino, alkylamino, dialkylamino, or —NHCONRR′ where R is hydrogen or alkyl and R′ is hydrogen, alkyl, cycloalkyl, or cycloalkylalkyl wherein cycloalkyl and cycloalkylalkyl are optionally substituted with one, two or three alkyl.

4. The compound of claim 1 wherein:

R d1 is hydrogen, hydroxy, alkoxy, amino, alkylamino or dialkylamino;

R d and R d2 are independently hydrogen, alkyl, halo, alkoxy, alkylthio, or alkylsulfonyl; and R d3 is a group of formula:

optionally substituted with halo, alkyl, cycloalkyl, cycloalkylalkyl, alkoxy, cycloalkoxy, nitro, amkylcarbonylamino, cycloalkylcarbonylamino, cycloalkylalkylcarbonylamino, alkyloxycarbonylamino, amino, alkylamino, dialkylamino, or —NHCONRR′ where R is hydrogen or alkyl and R′ is hydrogen, alkyl, cycloalkyl, or cycloalkylalkyl wherein cycloalkyl and cycloalkylalkyl are optionally substituted with one, two or three alkyl.

5. The compound of any of the claims 1 , 2 , 3 , or 4 wherein R d3 is optionally substituted with methyl, ethyl, n-propyl, i-propyl, n-butyl, 1-methylpropyl, 2-methylpropyl, tert-butyl, 2,2,-dimethylpropyl, 1,2-dimethylpropyl, 1,2,2-trimethylpropyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclopropylmethyl, cyclobutylmethyl, cyclopentylmethyl and cyclohexylmethyl.

6. The compound of any of the claims 1 , 2 , 3 or 4 wherein R d3 is optionally substituted with amino, methylamino, ethylamino, propylamino, 1-methylethylamino, 1,1-dimethylethylamino, 2-methylpropylamino, 1-methylpropylamino, 2,2-dimethyipropylamino, 1,2-dimethylpropylamino, 1,1-dimethylpropylamino, methylcarbonylamino, ethylcarbonylamino, propylcarbonylamino, 1-methylethylcarbonylamino, 1,1-dimethylethylcarbonylamino, 2-methyipropylcarbonylamino, 1-methylpropylcarbonylamino, 2,2-dimethylpropylcarbonylamino, 1,2-dimethylpropylcarbonylamino, 1,1-dimethylpropylcarbonylamino, cyclopropylcarbonylamino, cyclobutylcarbonylamino, cyclopentylcarbonylamino, cyclohexylcarbonylamino, cyclopropylmethylcarbonylamino, cyclobutylmethylcarbonylamino, cyclopentylmethylcarbonylamino, cyclohexylmethylcarbonylamino, methoxycarbonylamino, ethoxycarbonylamino, propoxycarbonylamino, 1-methylethoxycarbonylamino, 1,1-dimethyl-ethoxycarbonylamino, 2-methyipropoxycarbonylamino, 1-methyipropoxycarbonylamino, 2,2-dimethyipropoxycarbonylamino, 1,2-dimethylpropoxycarbonylamino, or 1,1-dimethyipropoxy-carbonylamino.

7. A compound of Formula (I):

wherein

E is —COCONR 5 R 6 , —COCF 2 CONR 5 R 6 , —COCF 2 C(O)OR 5 , —COCOR 7 , —COCF 2 R 8, —COR 9 , or —B(OR 13 ) 2 where R 5 , R 6 , R 7 , R 9 , and each R 13 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl, or heterocyclylalkyl and R 8 is halo, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl, or heterocyclylalkyl wherein the aliphatic, alicyclic and aromatic groups in E are optionally substituted with one, two, or three R a independently selected from hydroxy, alkoxy, aryloxy, heteroaryloxy, alkylthio, arylthio, heteroarylthio, amino, monosubstituted amino, disubstituted amino, alkylsulfonyl, arylsulfonyl, carboxy, alkoxycarbonyl, alkenyloxycarbonyl, alkynyloxycarbonyl, alkenylaminocarbonyl, acylamino, aminocarbonyl, halo, or cyano and further wherein the aromatic ring in R a is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, carboxy, or carboxyalkyl;

R 1 is alkyl, haloalkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl or heterocyclylalkyl wherein the aliphatic, alicyclic and aromatic groups in R 1 are optionally substituted with one or two R b independently selected from hydroxy, alkoxy, aryloxy. heteroaryloxy, alkylthio. arylthio, heteroarvlthio, amino, monosubstituted amino, disubstituted amino, alkylsulfonyl, arylsulfonyl, carboxy, alkoxycarbonyl, acylamino, aminocarbonyl, halo, or cyano and further wherein the aromatic ring in R b is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, carboxy, or carboxyalkyl;

X is —O—, —NH—, —S—, —SO—, or —SO 2 —;

R 3 is alkyl, haloalkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, heteroaryl, heteroaralkyl, heterocyclyl or heterocyclylalkyl wherein the aliphatic, alicyclic and aromatic groups in R 3 are optionally substituted with one or two R c independently selected from hydroxy, alkoxy, aryloxy, heteroaryloxy, alkylthio, arylthio, heteroarylthio, amino, monosubstituted amino, disubstituted amino, alkylsulfonyl, arylsulfonyl, carboxy, alkoxycarbonyl, acylamino, aminocarbonyl, halo, or cyano and further wherein the aromatic ring in R c is optionally substituted with one, two, or three substituents independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy, carboxy, or carboxyalkyl;

Y is —OC(O)NH—, —NR 14 —C(O)NH—, or NR 14 C(O)O—where each R 14 selected from hydrogen, alkyl optionally substituted with hydroxy, alkoxy, amino, monosubstituted amino, disubstituted amino, aryl, heteroaryl or heterocyclyl;

R 2 is a group of formula (b):

where:

R d1 is hydrogen, hydroxy, alkoxy, amino, alkylamino, dialkylamino, haloalkoxy or alkylsulfonyl;

R d and R d2 are independently hydrogen, alkyl, halo, alkoxy, alkylthio, or alkylsulfonyl; or

R d1 and R d or R d1 and R d2 together with the carbon atoms to which they are attached form 4, 5, or 6-atom heterocyclyl ring wherein one or two ring atoms are replaced by oxygen or —N— where the heterocyclyl ring is optionally substituted with one or two alkyl;

R d3 is hydrogen, alkyl, cycloalkyl or cycloalkylalkyl; wherein at least one of R d , R d1 , R d2 and R d3 is other than hydrogen; and

R 4 is alkyl;

or a pharmaceutically acceptable salt thereof.

8. The compound of claim 7 wherein R d1 is hydrogen, hydroxy, alkoxy, amino, alkylamino or dialkylamino; R d and R d2 are independently hydrogen, alkyl, halo, alkoxy, alkylthio, or alkylsulfonyl; and R d3 is a hydrogen, alkyl or cycloalkyl.

9. The compound of claim 7 wherein R d1 is hydrogen, hydroxy, methoxy, ethoxy, n-propoxy, iso-propoxy, methylamino, ethylamino, n-propylamino, isopropylamino, dimethylamino, methylethylamino, methyl(n-propyl)amino or methyl(isopropyl)amino; and R d and R d2 are independently, fluoro, chloro, methyl, methoxy, ethoxy, thiomethyl or methylsulfonyl.

10. The compound of claim 7 wherein R d1 is hydrogen, hydroxy, methoxy, or ethoxy; and R d and R d2 are independently, hydrogen, fluoro, chloro or methyl.

11. The compound of claim 7 wherein R d1 is methoxy or ethoxy; and R d , R d2 and R d3 are each hydrogen.

12. The compound of any of the claims 1 , 2 , 3 or 4 , wherein X is —O—; R 1 is alkyl or cycloalkylalkyl; and R 3 is 1-methylethyl, 1 -methylpropyl, tert-butyl, cyclopropyl, phenyl, or cyclohexyl.

13. The compound of any of the claims 1 , 2 , 3 or 4 wherein X is —O—; R 1 is cyclobutylmethyl, ethyl, or n-propyl; and R 3 is tert-butyl or cyclohexyl.

14. The compound of any of the claims 1 , 2 , 3 or 4 , wherein E is —COCONHR 6 where R 6 is hydrogen, alkyl, cycloalkyl, aralkyl, or heteroaralkyl wherein the aromatic ring is optionally substituted with one or two halo.

15. The compound of any of the claims 1 , 2 , 3 or 4 , wherein E is —COCONHR 6 where R 6 is cyclopropyl.

16. The compound of any of the claims 1 , 2 , 3 or 4 , wherein Y is —NHC(O)NH— and R 4 is alkyl.

17. The compound of any of the claims 1 , 2 , 3 or 4 , wherein Y is —OC(O)NH— and R 4 alkyl.

18. The compound of any of the claims 1 , 2 , 3 4 , wherein Y is —C(O)NH— and R 4 is alkyl.

19. A compound having the structure:

or a pharmaceutically acceptable salt thereof.

20. A compound having the structure:

or a pharmaceutically acceptable salt thereof.

21. A diastereomeric mixture of compounds represented by the structure:

or a pharmaceutically acceptable salt thereof.

22. A compound selected from the group consisting of:

1-[2S-(3-tert-butylureido)-3,3-dimethylbutyryl]-4R-(7-methoxy-2-pyrazol-1-yl-quinolin-4-yloxy)-pyrrolidine-2S-carboxylic acid (1S-cyclopropylaminooxalylbutyl)amide;

1-[2S-(3-tert-butylureido)-3,3-dimethylbutyryl]-4R-(7-methoxy-2-pyrazol-1-yl quinolin-4-yloxy)-pyrrolidine-2-carboxylic acid (1S-cyclobutylmethyl-2-cyclopropylcarbamoyl-2-oxoethyl)amide;

1-[2S-(3-tert-butylureido)-3,3-dimethylbutyryl]-4R-(5-chloropyridin-2-yloxy)-pyrrolidine-2S-carboxylic acid (1S-cyclobutylmethyl-2-cyclopropylcarbamoyl-2-oxoethyl)-amide;

{1S[2S-(1S-cyclopropylaminooxalylbutylcarbamoyl)-4R-(7-methoxy-2-pyrazol-1-yl-quinolin-4-yloxy)-pyrrolidine-1-carbonyl]- 2,2-dimethyipropyl }-carbamic acid tert-butyl ester;

{1S-[2S-( 1 S-cyclopropylaminooxalylbutylcarbamoyl)-4R-(7-methoxy-2-pyrazol-1-yl-quinolin-4-yloxy)-pyrrolidine-1-carbonyl]- 2,2-dimethylpropyl }-carbamic acid tert-butyl ester;

{1S-[4R-(5-chloropyridin-2-yloxy)-2S-(1S-cyclopropylaminooxalylbutyl-carbamoyl)-pyrrolidine-1-carbonyl]-2,2-dimethyl-propyl}-carbamic acid tert-butyl ester;

{1S-[4R-(5-chloropyridin-2-yloxy)-2S-(1S-cyclobutylmethyl-2-cyclopropylcarbamoyl-2-oxo-ethylcarbamoyl)-pyrrolidine-1-carbonyl]-2,2-dimethyl-propyl}-carbamic acid tert-butyl ester; and

1-[2-(3-tert-butylureido)-3,3-dimethyl-butyryl]-4-(5-chloro-pyridin-2-yloxy)-pyrrolidine-2-carboxylic acid (1-cyclopropylaminooxalyl-butyl)-amide.

23. A pharmaceutical composition comprising a compound of any of the claims 1 , 2 , 3 or 4 , and one or more pharmaceutically acceptable excipients.

24. A method of treating hepatitis C infections in a patient comprising administering to the patient a pharmaceutical composition comprising a compound of any of the claims 1 , 2 , 3 - or 4 , and one or more pharmaceutically acceptable excipients.

25. The compound of claim 1 which is 1-[2S-(3-tert-butylureido)-3,3-dimethylbutyryl]-4R-(7-methoxy-2-pyrazol-1-yl-quinolin-4-yloxy)-pyrrolidine-2S-carboxylic acid (1S-cyclopropylaminooxalylbutyl)amide; or a pharmaceutically acceptable salt thereof.

26. The compound which is 1-[2S-(3-tert-butylureido)-3,3-dimethylbutyryl]-4R-(7-methoxy-2-pyrazol-1-yl-quinolin-4-yloxy)-pyrrolidine-2S-carboxylic acid (1R-cyclopropylaminooxalylbutyl)amide; or the sulfate or methylsulfonate salt thereof.

27. A pharmaceutical composition comprising a compound of claim 14 and one or more pharmaceutically acceptable excipients.

28. A pharmaceutical composition comprising a compound of claim 19 and one or more pharmaceutically acceptable excipients.

29. A method of treating hepatitis C infections in a patient comprising administering to the patient a pharmaceutical composition comprising a compound of claim 15 , and one or more pharmaceutically acceptable excipients.

30. A method of treating hepatitis C infections in a patient comprising administering to the patient a pharmaceutical composition comprising a compound of claim 15 , and one or more pharmaceutically acceptable excipients.

31. A compound selected from the group consisting of:

1-[2S-(3-tert-Butyl-ureido)-3,3-dimethyl-butyryl]-4R-(6-methoxy-isoquinolin-1-yloxy)-pyrrolidine-2S-carboxylic acid(1S-cyclopropylaminooxalyl-butyl)-amide;

1-[2S-(3tert-Butyl-ureido)-3,3-dimethyl-butyryl]-4R-(6-methoxy-isoquinolin-1-yloxy)-pyrrolidine-2S-carboxylic acid(2-cyclopropylcarbamoyl-1S-cyclopropylmethyl -2-oxo-ethyl)-amide;

1-[2S-(3-tert-Butyl-ureido)-3,3-dimethyl-butyryl]-4R-(6-ethoxy-isoquinolin- 1-yloxy)-pyrrolidine-2-carboxylic acid(2-cyclopropylcarbamoyl-1S-cyclopropylmethyl-2S-oxo-ethyl)-amide;

1-[2S-(3-tert-Butyl-ureido)-3,3-dimethyl-butyryl]-4R-(6-ethoxy-isoquinolin-1-yloxy)-pyrrolidine-2S-carboxylic acid(1S-cyclopropylaminooxalyl-butyl)-amide;

1-[2S-(3-tert-Butyl-ureido)-3,3-dimethyl-butyryl]-4R-(6-methoxy-isoquinolin-1-yloxy)-pyrrolidine-2S-carboxylic acid(1S-cyclopropylaminooxalyl-pentyl)-amide;

(S)-1-[2-(3-tert-Butylureido)-3,3-dimethylbutyryl]-4-trans-(3-cyclopropyl-6-methoxyisoquinolin-1-yloxy)pyrrolidine- 2-(S)-carboxylic acid (1-cyclopropylaminooxalyl-butyl)amide Hydrochloride; and

1-[2-(3-tert-Butyl-ureido)-3,3-dimethyl-butyryl]-4-(3-methyl-6-methoxyisoquinolin-1-yloxy)-pyrrolidine-2-carboxylic acid(1-cyclopropylaminooxalylbutyl)-amide.