3-Thiophenacetic acid → N-[3-(3-{2-[(3-{[2-(dimethylamino)ethyl]oxy}phenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(3-thienyl)acetamide

Participants

Reaction Steps

To a solution of 4-[2-(3-aminophenyl)pyrazolo[1,5-a]pyridin-3-yl]-N-(3-{[2-(dimethylamino)ethyl]oxy}phenyl)-2-pyrimidinamine (140 mg, 0.3 mmol) in THF were added 3-thienylacetic acid (51 mg, 0.36 mmol), TEA (125 μL, 0.9 mmol), and O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (136 mg, 0.36 mmol). The reaction was stirred overnight at rt, after which the reaction mixture was diluted with DCM, washed with 5% aqueous Na2CO3, dried over Na2SO4, and adsorbed onto silica gel. The crude product was purified by column chromatography and lyophilized to generate the title compound in 72% yield. 1H NMR (400 MHz, d6-DMSO) δ 10.27 (s, 1H), 9.55 (s, 1H), 8.83 (d, J=6.7 Hz, 1H), 8.51 (d, J=8.8 Hz, 1H), 8.26 (d, J=5.1 Hz, 1H), 7.89 (s, 1H), 7.76 (d, J=8.1 Hz, 1H), 7.40-7.53 (m, 4H), 7.26-7.31 (m, 3H), 7.08-7.18 (m, 3H), 6.53 (d, J=8.2 Hz, 1H), 6.48 (d, J=5.3 Hz, 1H), 3.99 (t, J=5.7 Hz, 2H), 3.66 (s, 2H), 2.58 (t, J=5.9 Hz, 2H), 2.18 (s, 6H). ES-LC/MS m/z=588 [M+H]+.

Provenance & Evidence