Substituted arylpyrazoles

1. A combination product comprising a compound of formula (I):

wherein:

R 1 is CF 3 , OCF 2 H, OCF 3 , —SCF 3 , —SOCF 3 , —SO 2 CF 3 , or SF 5 ;

R 2 is H, fluoro, or C 1-4 alkyl optionally substituted by 1 to 5 halogen atoms independently selected from chloro and fluoro;

R 3 , R 4 , R 5 , and R 6 are independently selected from H, Cl, F, or C 1-4 alkyl optionally substituted by 1 to 5 halogen groups independently selected from chloro and fluoro;

R 7 is Cl or fluoro;

X is CR 8 where R 8 is Cl or fluoro; and

R 9 is NR a R b ;

R a is selected from hydrogen, C 1-6 alkyl, C 2-6 alkenyl, C 3-8 cycloalkyl, C(O)OC 1-6 alkyl and C 1-6 alkanoyl, wherein each of the above groups may include one or more optional substituents where chemically possible independently selected from halo, phenyl, hydroxy, —C(O)OH, —C(O)O C 1-6 alkyl, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, amino, C 1-6 alkyl amino and di C 1-6 alkyl amino;

R b is selected from hydrogen, C 1-6 alkyl, C 2-6 alkenyl, C 1-6 alkanoyl and C(O)OC 1-6 alkyl, wherein each of the above groups may include one or more optional substituents where chemically possible independently selected from, halo, phenyl, hydroxy, —COOH, —C(O)O C 1-6 alkyl, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, amino, C 1-6 alkyl amino and di C 1-6 alkyl amino;

or a pharmaceutically acceptable salt or prodrug thereof;

with the proviso that at least one of R 2 , R 3 , R 4 , R 5 , or R 6 is fluoro, with one or more other biologically active compounds.

2. The combination of claim 1 , wherein R 1 is CF 3 or SF 5 .

3. The combination of claim 1 , wherein R 2 is F, CF 3 or CHF 2 .

4. The combination of claim 1 , wherein R 3 and R 4 both represent fluoro and R 5 and R 6 represent hydrogen.

5. The combination of claim 1 , wherein R 2 is CF 3 , R 3 and R 4 both represent fluoro and R 5 and R 6 represent hydrogen.

6. The combination of claim 1 , wherein X is CR 8 and R 7 and R 8 are both chloro.

7. The combination of claim 1 , wherein R 9 is selected from NH 2 , C 1-6 alkoxycarbonylamino, with optional substitution on the alkyl group by one or more fluoro groups, di-C 1-6 alkylamino and het, C 1-6 alkylamino, with optional substitution on the alkyl group by one or more fluoro groups, C 3-8 cycloalkyl, phenyl and het.

8. The combination of claim 1 , wherein R 9 is NH 2 .

9. The combination of claim 1 , wherein the compound of formula (I) is selected from:

5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-(1,2,2-trifluorocyclopropyl)-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-(pentafluorocyclopropyl)-1H-pyrazole-3-carbonitrile;

5-amino-4-(2,2-dichloro-1-fluorocyclopropyl)-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-(pentafluorocyclopropyl)-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-(1,2,2-trifluorocyclopropyl)-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[1-(difluoromethyl)-2,2-difluorocyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-(2,2-difluorocyclopropyl)-1H-pyrazole-3-carbonitrile;

5-amino-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1-[2,6-difluoro-4-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-[1-(difluoromethyl)-2,2-difluorocyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-4-{1-[chloro(fluoro)methyl]-2,2-difluorocyclopropyl}-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[1-(difluoromethyl)-2,2,3,3-tetrafluorocyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2,3,3-tetrafluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-5-(methylamino)-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethoxy)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethoxy)phenyl]-4-[1-(difluoromethyl)-2,2,3,3-tetrafluorocyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethoxy)phenyl]-4-[1-(difluoromethyl)-2,2-difluorocyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(fluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-(2,2-difluoro-1-methylcyclopropyl)-1H-pyrazole-3-carbonitrile;

5-amino-1-{2,6-dichloro-4-[(trifluoromethyl)thio]phenyl}-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

ethyl 3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazol-5-ylcarbamate;

1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-5-(2-oxo-1,3-oxazolidin-3-yl)-1H-pyrazole-3-carbonitrile;

2-(dimethylamino)ethyl 3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazol-5-ylcarbamate;

2,2,2-trifluoroethyl 3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazol-5-ylcarbamate;

5-amino-1-{2,6-dichloro-4-[(trifluoromethyl)sulfonyl]phenyl}-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(difluoromethoxy)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-[1-(difluoromethyl)-2,2,3,3-tetrafluorocyclopropyl]-1H-pyrazole-3-carbonitrile;

Isopropyl 3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazol-5-ylcarbamate; and

5-amino-4-{1-[chloro(difluoro)methyl]-2,2-difluorocyclopropyl}-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonitrile, or a pharmaceutically acceptable salt thereof.

10. The combination of claim 1 , wherein the combination comprises a compound of formula (I), or a pharmaceutically acceptable salt thereof, and one or more other anti-parasitic agents.

11. The combination of claim 10 , wherein the one or more other anti-parasitic agents are selected from ivermectin, avermectin, abamectin, emamectin, eprinomectin, doramectin, selamectin, moxidectin, nemadectin, albendazole, cambendazole, fenbendazole, flubendazole, mebendazole, oxfendazole, oxibendazole, parbendazole, tetramisole, levamisole, pyrantel pamoate, oxantel, morantel, triclabendazole, praziquantel, epsiprantel, fipronil, lufenuron, ecdysone, tebufenozide and imidacloprid.

12. A pharmaceutical composition comprising a compound of formula (I) of claim 1 , or a pharmaceutically acceptable salt thereof, one or more further biologically active compounds, and a pharmaceutically suitable excipient.

13. A compound of claim 1 which is 5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile, or a pharmaceutically acceptable salt thereof.

14. A compound of claim 1 which is 5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]4-(1,2,2-trifluorocyclopropyl)-1H-pyrazole-3-carbonitrile, or a pharmaceutically acceptable salt thereof.

15. A compound of claim 1 which is 5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile, or a pharmaceutically acceptable salt thereof.

16. A compound of claim 1 which is 5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-(pentafluorocyclopropyl)-1H-pyrazole-3-carbonitrile, or a pharmaceutically acceptable salt thereof.