Trifluoroacetic acid → 1-(3-Fluoro-4-(2-(5-((2-methoxyethylamino)methyl)pyridin-2-yl)thieno[3,2-b]pyridine-7-yloxy)phenyl)urea

Participants

Reaction Steps

To a solution of compound 288 (0.33 g, 0.581 mmol) in DCM (11.6 mL) was added TFA (0.53 mL, 6.98 mmol, 12 eq.). The reaction mixture was stirred at r.t. for 24 h, concentrated and the residue was purified by Biotage SPI Flash Purification System (eluent a gradient DCM/MeOH/NH4OH, 95/5/0.1 to 9/1/0.2) to afford 289 as a white solid (0.256 g, 0.548 mmol, 94% yield). Characterization of compound 289 is provided in the Table 6.

Provenance & Evidence