Hydrochloric Acid → methyl 5-(ethylamino)-4-[({5-[4-(2-fluoro-5-{[(2-fluoro-5-methylphenyl)amino]carbonyl}phenoxy)pyridin-2-yl]-1H-pyrrol-3-yl}carbonyl)amino]-5-oxopentanoate

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of 2-[({5-[4-(2-fluoro-5-{[(2-fluoro-5-methylphenyl)amino]carbonyl}phenoxy)pyridin-2-yl]-1H-pyrrol-3-yl}carbonyl)amino]-5-methoxy-5-oxopentanoic acid (260 mg, 0.44 mmol) in 20 ml of anhydrous tetrahydrofuran were added HATU (200 mg, 0.53 mmol) and N,N-diisopropylethylamine (170 mg, 1.32 mmol). The mixture was heated at 60° C. for 15 minutes and cooled to room temperature, followed by addition of 2-Methylamine solution in THF (0.44 ml, 0.88 mmol). The mixture was stirred for another 5 minutes, and poured into 100 ml of water with vigorous stirring. 1M HCl was added dropwise until pH=4. The precipitates were filtered, washed with water and dried in vacuo to give the crude, which was purified by silica gel chromatography eluting with 2˜5% methanol in chloroform to give methyl 5-(ethylamino)-4-[({5-[4-(2-fluoro-5-{[(2-fluoro-5-methylphenyl)amino]carbonyl}phenoxy)pyridin-2-yl]-1H-pyrrol-3-yl}carbonyl)amino]-5-oxopentanoate as white solid. Yield: 127 mg, 47%.

Provenance & Evidence