Solid forms of selective androgen receptor modulators

1. A paracrystalline form of (S)-N-(4-cyano-3-(trifluoromethyl)phenyl)-3-(4-cyanophenoxy)-2-hydroxy-2-methylpropanamide compound whereby said paracrystalline form is paracrystalline form B″ characterized by:

a. an X-ray powder diffraction pattern produced using a tube anode of Cu with Ka radiation, said diffraction pattern displaying a broad halo with two harmonic peaks between 15-25°2θ and

b. a phase transition point of about 55° C. as determined by differential scanning calorimetry (DSC).

2. A composition comprising the paracrystalline form B″ of (S)-N-(4-cyano-3-(trifluoromethyl)phenyl)-3-(4-cyanophenoxy)-2-hydroxy-2-methylpropanamide of claim 1 and a suitable carrier or diluent.

3. A process for the preparation of a paracrystalline form B″ of compound (S)-N-(4-cyano-3-(trifluoromethyl)phenyl)-3-(4-cyanophenoxy)-2-hydroxy-2-methylpropanamide according to claim 1 comprising evaporation of said compound from ethanol without an antisolvent.

4. A process for the preparation of a paracrystalline form B″ of compound (S)-N-(4-cyano-3-(trifluoromethyl)phenyl)-3-(4-cyanophenoxy)-2-hydroxy-2-methylpropanamide according to claim 1 comprising melting or heating a solid form A of said compound to 80° C. followed by cooling, wherein the solid form A of said compound is characterized by:

a) an X-Ray Powder diffraction pattern comprising peaks at °2θ (d value Å) angles of about 5.6 (15.9), 7.5 (11.8), 8.6 (10.3), 9.9 (8.9), 12.4 (7.1), 15.0 (5.9), 16.7 (5.3), 17.3 (5.1), 18.0 (4.9), 18.5 (4.8), 19.3 (4.6), 19.8 (4.5), 20.6 (4.3), 21.8 (4.1), 22.3 (4.0), 23.4 (3.8), 23.9 (3.7), 24.6 (3.6), 24.9 (3.6), 25.4 (3.5), 26.0 (3.4), 26.5 (3.4), 27.8 (3.2); and

b) a melting point of about 80° C.

5. A process for the preparation of a paracrystalline form B″ of compound (S)-N-(4-cyano-3-(trifluoromethyl)phenyl)-3-(4-cyanophenoxy)-2-hydroxy-2-methylpropanamide according to claim 1 comprising melting or heating a solid form D of said compound to 130° C. followed by cooling, wherein the solid form D of said compound D is characterized by:

a) an X-Ray Powder diffraction pattern comprising unique peaks at °2θ (d value Å) angles of about 4.4 (19.9), 8.5 (10.4), 8.8 (10.0), 11.3 (7.8), 12.7 (6.9), 13.8 (6.4), 14.4 (6.1), 14.6 (6.0), 15.1 (5.8), 16.1 (5.5), 16.6 (5.3), 16.9 (5.2), 18.0 (4.9), 18.7 (4.7), 19.0 (4.6), 19.4 (4.55), 20.8 (4.25), 22.1 (4.0), 22.7 (3.9), 23.1 (3.8), 23.4 (3.8), 24.7 (3.6), 24.9 (3.56), 25.3 (3.51), 27.8 (3.2), 29.3 (3.0); and

b) a melting point of about 130° C.

6. The paracrystalline form of claim 1 , wherein said paracrystalline form B″ is a thermotropic liquid crystalline form.

7. A composition comprising a mixture of crystalline and paracrystalline solid form B″ of (S)-N-(4-cyano-3-(trifluoromethyl)phenyl)-3-(4-cyanophenoxy)-2-hydroxy-2-methylpropanamide compound of claim 1 and a suitable carrier or diluent.