反应详情

温度

0 °C

To a solution of 4-fluoro-N2-phenylbenzene-1,2-diamine (562 mg, 2.8 mmol) in DCM (18 mL) at 0° C. were added (S)-2-tertbutoxycarbonylamino-3-ethoxypropionic acid (720 mg, 3.1 mmol), HOAt (0.420 g, 3.1 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.59 g, 3.1 mmol) and the resulting mixture stirred at 0° C. for 1 h. The reaction mixture was partitioned between DCM and a saturated aqueous solution of NaHCO3. The organic fraction was washed with brine, dried (MgSO4), concentrated in vacuo and the resulting residue purified by column chromatography (Si—PCC, gradient 0-30% EtOAc in cyclohexane) to afford [(S)-2-ethoxy-1-(4-fluoro-2-phenylaminophenylcarbamoyl)ethyl]carbamic acid tert-butyl ester (770 mg, 66%). LCMS (Method B): RT 3.87 min [M+H]+ 418.3

1. customThe reaction mixture was partitioned between DCM
2. washThe organic fraction was washed with brine
3. dry with materialdried (MgSO4)
4. concentrationconcentrated in vacuo
5. customthe resulting residue purified by column chromatography (Si—PCC, gradient 0-30% EtOAc in cyclohexane)