反应详情

To solution of 6-(4-bromo -2-chloro-phenylamino)-3-(2-carboxy-ethyl)-7-fluoro-3H-benzoimidazole-5-carboxylic acid methyl ester (60 mg, 0.13 mmol) in DMF (1.8 mL) is added HOBt-H2O (24 mg, 0.16 mmol), Et3N (0.043 mL, 0.31 mmol), pyrrolidine (0.011 mL, 0.13 mmol), and EDCI (34 mg, 0.18 mmol) at room temperature. The resulting yellow solution is stirred 16 hours at room temperature. The reaction mixture is diluted with EtOAc and water, washed with sat'd aqueous NH4Cl, brine, sat'd aqueous NaHCO3, and brine. The organic layer is dried over MgSO4, filtered, and concentrated in vacuo to give a crude material which is purified by flash chromatography (3% MeOH in CH2Cl2) to afford 45 mg (67%) of the desired product: MS APCI (+) m/z 523, 525 (M+, Br pattern) detected.

1. washwashed with sat'd aqueous NH4Cl, brine
2. dry with materialThe organic layer is dried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customto give a crude material which
6. customis purified by flash chromatography (3% MeOH in CH2Cl2)