反应详情

A mixture of 5-{4-[3-fluoro-4-({[(3-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrole-3-carboxylic acid (500 mg, 1.1 mmol), HATU (500 mg, 1.32 mmol) and N,N-diisopropylethylamine (426 mg, 3.3 mmol) in anhydrous DMF (8 ml) was stirred at room temperature for 10 minutes, followed by addition of L-Glutamic acid 5-tert-butyl 1-methyl ester hydrochloride (334 mg, 1.32 mmol). The mixture was stirred for another 10 minutes and poured into 200 ml of water. 2M HCl was added dropwise until pH=5. The precipitates were filtered, washed with water and dried in vacuo to give the crude, which was purified by silica gel chromatography eluting with 3˜5% MeOH/CHCl3 to give (S)-5-tert-butyl 1-methyl 2-{[(5-{4-[3-fluoro-4-({[(3-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrol-3-yl)carbonyl]amino}pentanedioate as off-white solid. Yield: 380 mg, 52%.

1. stirringThe mixture was stirred for another 10 minutes
2. filtrationThe precipitates were filtered
3. washwashed with water
4. customdried in vacuo
5. customto give the crude, which
6. customwas purified by silica gel chromatography
7. washeluting with 3˜5% MeOH/CHCl3