Triethylamine → 2-(2-(6-((R)-1-((S)-3-(tert-butoxycarbonylamino)pyrrolidin-1-yl)-2,2,2-trifluoroethyl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl)-6-fluoroquinolin-7-yloxy)ethyl isobutyrate

Participants

Reaction Steps

To a stirred solution of tert-butyl (S)-1-((R)-2,2,2-trifluoro-1-(3-(6-fluoro-7-(2-hydroxyethoxy)quinolin-2-yl)-[1,2,4]triazolo[4,3-a]pyridin-6-yl)ethyl)pyrrolidin-3-ylcarbamate (80 mg, 0.14 mmol) in DCM (1 mL) and Et3N (0.057 mL, 0.41 mmol) was added dropwise isobutyryl chloride (0.036 mL, 0.34 mmol) at 0° C. under nitrogen. The reaction mixture was warmed to ambient temperature and stirred overnight. The reaction mixture was diluted with DCM, washed with saturated aqueous NaHCO3 solution and brine, dried and concentrated under reduced pressure. The residue was purified by reverse phase preparative HPLC (5-95% acetonitrile/water) to give 2-(2-(6-((R)-1-((S)-3-(tert-butoxycarbonylamino)pyrrolidin-1-yl)-2,2,2-trifluoroethyl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl)-6-fluoroquinolin-7-yloxy)ethyl isobutyrate (75 mg, 84%).

Provenance & Evidence