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

Participants

Reaction Steps

To solution of {3-[3-(2-chloro-4-pyrimidinyl)pyrazolo[1,5-a]pyridin-2-yl]phenyl}amine (125 mg, 0.4 mmol) (see Example 2, step A) in THF (5 mL) were added 3-thienylacetic acid (67 mg, 0.47 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (90 mg, 0.47 mmol), N-hydroxybenzotriazole (63 mg, 0.47 mmol), and diisopropylethylamine (200 μL, 1.2 mmol). After 20 h at rt, the reaction mixture was diluted with DCM, washed with water, dried over Na2SO4, filtered, and adsorbed onto silica gel. The crude product was purified by column chromatography to generate the title compound in 69% yield. ES-LC/MS m/z=446 [M+H]+.

Provenance & Evidence