Reaction Steps
In a microwave vial with septum cap, 5-[3-(2-chloro-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]-N-(2,6-difluorophenyl)-2-(ethyloxy)benzamide (Intermediate Example 6) (0.148 g, 0.293 mmol) and 5-ethyl-2-(ethyloxy)-4-{4-[2-(methylsulfonyl)ethyl]-1-piperidinyl}aniline (0.104 g, 0.293 mmol) were taken up in 1,1,1-trifluoroethanol (1.5 mL) and 4M HCl in dioxane (0.147 mL, 0.587 mmol) was added. The vial was sealed and heated in the microwave at 180° C. for 40 min. Reaction was complete by MS, it was cooled to rt, neutralized with 7N ammonia in MeOH, and concentrated in vacuo onto silica gel and flash chromatographed. The desired fractions were combined and concentrated and the resulting solid was triturated with diethyl ether, filtered and air dried to give the title compound (0.14 g, 0.17 mmol, 58%). 1H NMR (400 MHz, DMSO-d6) δ ppm 9.70 (s, 1H), 9.29 (d, J=6.8 Hz, 1H), 8.34 (s, 1H), 8.23 (d, J=5.2 Hz, 1H), 8.03 (s, 1H), 7.61-7.79 (m, 2H), 7.55 (s, 1H), 7.29-7.48 (m, 2H), 7.08-7.28 (m, 3H), 6.89 (t, J=6.8 Hz, 1H), 6.76 (s, 1H), 6.56 (d, J=5.1 Hz, 1H), 4.23 (q, J=6.7 Hz, 2H), 4.03 (q, J=6.9 Hz, 2H), 3.07-3.20 (m, 2H), 2.84-3.04 (m, 5H), 2.60 (t, J=10.9 Hz, 2H), 2.51 (q, J=7.5 Hz, 2H), 1.75 (d, J=11.2 Hz, 2H), 1.60-1.70 (m, 2H), 1.35-1.55 (m, 4H), 1.15-1.36 (m, 5H), 1.05 (td, J=7.2, 1.9 Hz, 3H). MS (M+H, ES+) 824.
