p-Toluenesulfonic acid → N-(2,6-difluorophenyl)-3-(3-{2-[(2-(ethyloxy)-4-{4-[2-(methylsulfonyl)ethyl]-1-piperazinyl}phenyl)amino]-4-pyrimidinyl}imidazo[1,2-a]pyridin-2-yl)benzamide

Participants

Reaction Conditions

Reaction Steps

3-[3-(2-chloro-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]-N-(2,6-difluorophenyl)-benzamide (Intermediate Example 1) (100 mg, 0.22 mmol), 2-(ethyloxy)-4-{4-[2-(methylsulfonyl)-ethyl]-1-piperazinyl}aniline (Example 143, step C) (64 mg, 0.194 mmol), and p-toluenesulfonic acid (99 mg, 0.52 mmol) were weighed into a 20 mL vial. 10 mL of iPrOH was added and the mixture was heated to 130° C. for 72 h. The mixture was transferred to a 50 mL round bottom and neutralized with 2 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 (98 mg, 0.13 mmol, 61%). 1H NMR (400 MHz, DMSO-d6) δ ppm 10.22 (s, 1H), 9.36 (s, 1H), 8.34 (d, J=13.00 Hz, 2H), 8.21 (d, J=4.94 Hz, 1H), 8.02 (s, 1H), 7.79 (s, 1H), 7.72 (d, J=8.97 Hz, 1H), 7.59 (s, 1H), 7.36-7.48 (m, 3H), 7.19 (t, J=7.97 Hz, 2H), 6.96 (s, 1H), 6.66 (s, 1H), 6.41-6.52 (m, 2H), 4.05 (q, J=6.59 Hz, 2H), 3.30-3.37 (m, 2H), 3.07-3.14 (m, 4H), 3.02 (s, 3H), 2.74 (t, J=6.32 Hz, 2H), 2.54-2.61 (m, 4H), 1.22 (t, J=6.68 Hz, 3H). MS (ESI): 753 [M+H]+.

Provenance & Evidence