Patent ID: 8389562

Claim:
A process for preparing a pharmaceutically acceptable salt of sunitinib comprising reacting sunitinib base with a salt forming reagent, wherein the sunitinib base is a polymorphic form selected from the group consisting of sunitinib base polymorphic Form I having an X-ray diffraction pattern (2θ) having characteristic peaks at 4.5, 7.5, 9.1, 11.1, 13.1, 15.6, 16.3, 17.5, 18.8, 19.3, 25.0, 25.4, 25.9 and 29.4 degrees 2θ (±0.2 degrees) and sunitinib base polymorphic Form II having an X-ray diffraction pattern (2θ) having characteristic peaks at 7.2, 9.4, 10.7, 11.2, 13.6, 14.9, 16.0, 18.2, 18.9, 21.1, 22.0, 22.8, 26.7, and 29.9 degrees 2θ (±0.2 degrees).