Reaction Steps
5-[3-(2-chloro-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]-N-(2,6-difluorophenyl)-2-(methyloxy)benzamide (Intermediate Example 2) (100 mg, 0.2 mmol), 5-methyl-2-(methyloxy)-4-(1-propyl-4-piperidinyl)aniline (48 mg, 0.18 mmol), and p-toluenesulfonic acid (93 mg, 0.49 mmol) were weighed into a 20 mL vial. 7 mL of iPrOH was added and the mixture was heated to 120° C. for 48 h. The mixture was transferred to a 50 mL round bottom and neutralized with 3 mL of 0.5 N sodium methoxide. The solvent was rotovaped down. The residue was taken up in 10 mL of DCM. 1 g of silica gel was added. The solvent was rotovaped down and the pre-adsorbed solids were purified by flash chromatography to give the title compound (90 mg, 0.125 mmol, 69%). 1H NMR (400 MHz, DMSO-d6) δ ppm 9.77 (s, 1H), 9.38 (d, J=6.41 Hz, 1H), 8.46 (s, 1H), 8.24 (d, J=5.31 Hz, 1H), 8.09 (d, J=2.01 Hz, 1H), 7.76 (dd, J=8.61, 2.01 Hz, 1H), 7.69 (d, J=8.97 Hz, 1H), 7.52 (s, 1H), 7.41-7.46 (m, 1H), 7.33-7.40 (m, 1H), 7.27 (d, J=8.79 Hz, 1H), 7.17 (t, J=8.06 Hz, 2H), 6.95 (t, J=6.68 Hz, 1H), 6.89 (s, 1H), 6.57 (d, J=5.13 Hz, 1H), 3.97 (s, 3H), 3.80 (s, 3H), 2.91-3.01 (m, 2H), 2.58-2.67 (m, 1H), 2.20-2.30 (m, 2H), 2.18 (s, 3H), 1.92-2.03 (m, 2H), 1.62-1.73 (m, 4H), 1.40-1.49 (m, J=7.33, 7.33, 7.33, 7.33 Hz, 2H), 0.85 (t, J=7.33 Hz, 3H). MS (ESI): 718 [M+H]+.
