To 4-cyano-1H-pyrrole-2-carboxylic acid [2-(4-methyl-piperidin-1-yl)-4-piperazin-1-yl-phenyl]-amide trifluoroacetic acid salt (as prepared in Example 56, step (b)) (30 mg, 0.048 mmol) in dichloromethane (5 mL) was added acetic anhydride (7.0 μL, 0.072 mmol) and DIEA (31 μL, 0.18 mmol) and the mixture was stirred for 5 h at RT. The mixture was poured into saturated aq sodium bicarbonate (5 mL), extracted with dichloromethane (5 mL), and the organic layer was dried (Na2SO4). The solvents were removed in vacuo and the resulting residue was purified by silica gel preparative TLC eluting with 10% methanol in dichloromethane to yield 4.9 mg (23%) of the title compound as an off-white solid. 1H-NMR (400 MHz, CDCl3): δ 10.57 (br s, 1H), 8.99 (s, 1H), 8.27 (d, 1H, J=8.8 Hz), 7.45 (dd, 1H, J=3.1, 1.3 Hz), 6.851 (s, 1H), 6.81 (d, 1H, J=3.5 Hz), 6.73 (dd, 1H, J=8.9, 2.6 Hz), 3.79 (m, 2H), 3.64 (m, 2H), 3.17-2.96 (m, 4H), 2.74 (m, 2H), 2.70 (m, 2H), 2.15 (s, 3H), 1.87-1.84 (m, 2H), 1.58 (m, 1H), 1.44-1.34 (m, 2H), 1.08 (d, 3H, J=6.5 Hz). LC-MS (ESI, m/z): Calcd. for C24H31N6O2, 435.2 (M+H); found: 435.1.
