3,5-Difluorobenzoyl chloride (8.44 mg, 0.0478 mmol), 4-piperazin-1-yl-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]butanenitrile hydrochloride (from example 1, step 4; 0.02 g, 0.0398 mmol) and triethylamine (16.6 μL, 0.119 mmol) were mixed in acetonitrile (0.2 mL). The mixture was stirred at RT for 1 h. Solvents were evaporated. The crude product was treated with DCM (0.2 mL) and trifluoroacetic acid (0.2 mL, 0.002 mol) for 30 min. The reaction mixture was evaporated under reduced pressure. To the resultant residue was added methanol (1 mL) and ethylenediamine (0.1 mL, 0.001 mol). The reaction mixture was stirred at RT for 30 min and concentrated under reduced pressure. The residue was purified on RP-HPLC (XBridge C-18 Column, eluting with a gradient of acetonitrile/water containing 0.15% NH4OH, at flow rate 30 mL/min) to give the desired product. LCMS calculated for C24H23F2N8O(M+H)+: m/z=477.2; Found: 477.0.
