Example 7

Approximately 10-20 mg of 1-(4-{[6-Amino-5-(4-phenoxy-phenyl)-pyrimidin-4-ylamino]-methyl}-4-fluoro-piperidin-1-yl)-propenone were weighed into glass vials. 7 mL of FaSSIF medium (pH 6.5, prewarmed to 37° C.) were added and the suspension was shaken at 450 rpm at 37° C. After 30 min, 60 min and 120 min, 1 mL suspension was withdrawn and filtered through a 0.2 μm syringe filter. Clear filtrate was analysed by HPLC after suitable dilution to measure the amount of API dissolved.

Results from mini dissolution studies are summarised below.

Dissolution levels in FaSSIF pH 6.5 (μg/mL)
Free baseFree base
Timeform A1form A2HCl-NF1HBr-NF1
 30 min1675523
 60 min1784327
120 min1784635
TimeOxalate-NF1Fumarate-NF1
 30 min2214
 60 min3918
120 min5327

While a number of embodiments of this invention are described herein, it is apparent that the basic examples may be altered to provide other embodiments that utilize the compounds and methods of this invention. Therefore, it will be appreciated that the scope of this invention is to be defined by the previously described embodiments rather than by the specific embodiments that have been represented by way of example.

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