反应详情

A mixture of N2-cyclopropyl-4-fluorobenzene-1,2-diamine (0.724 g, 4.4 mmol), (S)-2-tertbutoxycarbonylaminopropionic acid (0.91 g, 4.8 mmol), HOAt (0.65 g, 4.8 mmol), 4-methylmorpholine (1.1 mL, 9.7 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.92 g, 4.8 mmol) in DCM (15 mL) was stirred at RT for 18 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)-1-(2-cyclopropylamino-4-fluorophenylcarbamoyl)ethyl]carbamic acid tert-butyl ester as a brown oil (1.07 g, 72%). LCMS (Method B): RT 3.40 min [M+H]+ 338.2. 110180243

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)