p-Toluenesulfonic acid → N-(2,6-difluorophenyl)-3-[3-(2-{[4-[4-(dimethylamino)-1-piperidinyl]-2-(methyl-oxy)phenyl]amino}-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]benzamide

Participants

Reaction Steps

3-[3-(2-chloro-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]-N-(2,6-difluorophenyl)-benzamide (Intermediate Example 1) (140 mg, 0.30 mmol), 1-[4-amino-3-(methyloxy)phenyl]-N,N-dimethyl-4-piperidinamine (67 mg, 0.27 mmol) and p-toluenesulfonic acid (140 mg, 0.71 mmol) in iPrOH was heated in the microwave at 180° C. for 13.5 min. The mixture was dissolved in DCM and concentrated onto silica gel. The crude material was purified by flash column chromatography to give the title compound (142 mg, 70%). 1H NMR (400 MHz, DMSO-d6) δ 10.23 (s, 1H), 9.40 (s, 1H), 8.45 (s, 1H), 8.33 (s, 1H), 8.20 (d, J=5.2 Hz, 1H), 8.05 (d, J=8.0 Hz, 1H), 7.81 (d, J=7.6 Hz, 1H), 7.72 (d, J=8.8 Hz, 1H), 7.60 (t, J=7.6 Hz, 1H), 7.48-7.36 (m, 3H), 7.20 (t, J=8.2 Hz, 2H), 6.97 (t, J=6.8 Hz, 1H), 6.67 (m, 1H), 6.49-6.45 (m, 2H), 3.79 (s, 3H), 3.70 (d, J=12.4 Hz, 2H), 2.68-2.63 (m, 2H), 2.18 (s, 7H), 1.84-1.81 (m, 2H), 1.52-1.44 (m, 2H). MS (ESI) m/z=675 [M+H]+.

Provenance & Evidence