4-[4-Amino-5-(2-methoxy-benzoyl)-pyrimidin-2-ylamino]-piperidine-1-carboxylic acid tert-butyl ester (1.96 g, Example 10) was dissolved in dichloromethane (25 mL), cooled to 0° C. and treated with trifluoroacetic acid (12.5 mL). After stirring 1 hour at 0° C., the reaction mixture was concentrated in vacuo to give 4.29 g of [4-amino-2-(piperidin-4-ylamino)-pyrimidin-5-yl]-(2-methoxy-phenyl)-methanone as the trifluoroacetic acid salt. A portion of the crude product was purified on HPLC and then neutralized with sodium carbonate, washed with brine and dried to give [4-amino-2-(piperidin-4-ylamino)-pyrimidin-5-yl]-(2-methoxy-phenyl)-methanone free base. -. HRMS, observed: 328.1771; Calcd for (M+H)+: 328.1768.
