Solid forms of [4-(3-fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl-[5-methanesulfonyl-2-((s)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone

Abstract

The present invention relates to four distinct crystalline forms and to an amorphous form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone, and to their use in the preparation of pharmaceutical compositions. The compounds of present invention are suitable for the treatment of psychoses, pain, neurodegenerative disfunction in memory and learning, schizophrenia, dementia and other diseases in which cognitive processes are impaired, such as attention deficit disorders or Alzheimer's disease.

1 . An amorphous form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by an absence of sharp X-ray peaks in its XRPD pattern and/or by an infrared spectrum having sharp bands at 1642, 1622, 1599, 1579, 1509, 1487, 1399, 1329, 1293, 1253, 1159, 1124, 1090, 1016, 960, 920, 903, 889, 827, 782, 763, 739 and 636 cm −1  (±3 cm −1 ). 
     
     
         2 . An amorphous form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by a glass transition temperature (DSC, heating rate 10 K/min, closed pan) of about 48° C. to about 65° C. 
     
     
         3 . A methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by at least three peaks selected from the following X-ray diffraction peaks obtained with a CuKα radiation, expressed in degrees 2Theta=8.0, 8.9, 10.5, 12.6, 15.2, 16.1, 17.7, 18.5, 19.8, 20.2, 21.7, 22.9, 24.2 and 25.9 (±0.2). 
     
     
         4 . A methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by the following X-ray diffraction peaks obtained with a CuKα radiation, expressed in degrees 2Theta=8.0, 8.9, 10.5, 12.6, 15.2, 16.1, 17.7, 18.5, 19.8, 20.2, 21.7, 22.9, 24.2 and 25.9 (±0.2). 
     
     
         5 . A methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by the X-ray diffraction pattern as substantially shown in  FIG. 18 . 
     
     
         6 . A methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by an infrared spectrum having sharp bands at 3154, 3081, 1709, 1614, 1586, 1378, 1337, 1313, 1247, 1189, 1172, 1124, 1085, 1019, 959, 928, 916, 908, 894, 857, 783, 772, 729 and 702 cm −1  (±3 cm −1 ). 
     
     
         7 . A methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone characterized by an infrared spectrum as substantially shown in  FIG. 19 . 
     
     
         8 . A method for preparing an amorphous form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone comprising:
 either fast evaporation from a solution of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone at about 40° C. under vacuum;   or lyophilization of a solution of a solution of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone.   
     
     
         9 . A method for preparing methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone comprising:
 either digestion in solvents;   or recrystallization of form A, B, C or amorphous form and Methyl-paraben with or without seeding in solvent systems.   
     
     
         10 . A pharmaceutical composition comprising an amorphous form or a methylparaben cocrystal form of [4-(3-Fluoro-5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-[5-methanesulfonyl-2-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-phenyl]-methanone as an active ingredient.