Substituted arylpyrazoles

1. The method of treating a parasitic infection using 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 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, het, 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)OC 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 method 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;

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.

3. The method of claim 1 , wherein the combination comprises a compound of formula (I), or a pharmaceutically acceptable salt thereof, and one or more other biologically active compounds, wherein said biologically active compounds are anti-parasitic agents selected from the group consisting of 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 imidacioprid.