A solution of (R)-6-(3-aminopiperidin-1-yl)-2-(4-(diethylamino)phenylamino)nicotinamide (40 mg, 0.105 mmol), 3-tert-butyl-1H-pyrazole-5-carboxylic acid (21.11 mg, 0.125 mmol), EDC (30.1 mg, 0.157 mmol), HOBT (24.02 mg, 0.157 mmol), and Et3N (0.022 mL, 0.157 mmol) in THF (1 mL) was stirred at rt for 4 h. The reaction mixture was diluted with CH2Cl2, washed with satd. NaHCO3, and concentrated. The residue was purified by prep-HPLC. The product containing fractions were collected, basified with satd. Na2CO3, separated, and concentrated to give 33 mg of (R)-6-(3-(3-tert-butyl-1H-pyrazole-5-carboxamido) piperidin-1-yl)-2-(4-(diethylamino)phenylamino) nicotinamide as a yellow solid. LCMS: (M+H)+=533.30. 1H NMR (400 MHz, CDCl3) δ ppm 10.96 (1H, br. s.), 10.52 (1H, s), 7.44 (1H, d, J=8.79 Hz), 7.36 (2H, d, J=8.79 Hz), 7.06 (1 H, br. s.), 6.59 (2H, d, J=9.23 Hz), 6.00 (1H, d, J=8.79 Hz), 5.75 (1H, br. s.), 4.16-4.27 (1H, m), 3.82 (1H, br. s.), 3.58-3.72 (3H, m), 3.27 (4H, q, J=7.18 Hz), 1.86-1.96 (2H, m), 1.78 (1H, d, J=5.71 Hz), 1.62-1.70 (1H, m), 1.60 (2H, s), 1.33 (9H, s), 1.10 (6H, t, J=7.03 Hz).
