Trifluoroacetic acid → HCID 71293608, compound

Participants

Reaction Steps

To a stirred solution of tert-butyl 4-[(5-{4-[3-fluoro-4-({[(2-fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrol-3-yl)carbonyl]piperazine-1-carboxylate (200 mg, 0.32 mmol) in 10 ml of methylene chloride was added 3 ml of TFA. The mixture was stirred at room temperature for 30 minutes, and evaporated to dryness under reduced pressure. The residue was re-dissolved in 5 ml of methanol and poured into 100 ml of water with vigorous stirring. Saturated NaHCO3 solution was added until pH=9. The precipitates were filtered, washed with water and dried in vacuo to give the crude, which was purified by silica gel chromatography eluting with 12% methanol in chloroform to give 1-(2-fluoro-5-methylphenyl)-3-[2-fluoro-4-({2-[4-(piperazin-1-ylcarbonyl)-1H-pyrrol-2-yl]pyridin-4-yl}oxy)phenyl]urea as white solid. Yield: 145 mg, 86%

Provenance & Evidence