反应详情

温度

0 °C

To a solution of 4-fluoro-N2-pyridin-3-ylbenzene-1,2-diamine (0.594 g, 2.9 mmol) in DCM (18 mL) at 0° C. were added (S)-2-tertbutoxycarbonylaminobutyric acid (650 mg, 3.2 mmol), HOAt (440 mg, 3.2 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (610 mg, 3.2 mmol) and the reaction mixture stirred at 0° C. for 2 h. The crude mixture was partitioned between DCM and a saturated aqueous solution of NaHCO3. The organic phase was washed with brine, dried (MgSO4), concentrated in vacuo and the resulting residue purified by column chromatography (Si—PCC, gradient 0-60% EtOAc in cyclohexane) to afford {(S)-1-[4-fluoro-2-(pyridin-3-ylamino)phenylcarbamoyl]propyl}carbamic acid tert-butyl ester (839 mg, 75%). LCMS (Method J): RT 0.69 min [M+H]+ 389.2.

1. customThe crude mixture was partitioned between DCM
2. washThe organic phase was washed with brine
3. dry with materialdried (MgSO4)
4. concentrationconcentrated in vacuo
5. customthe resulting residue purified by column chromatography (Si—PCC, gradient 0-60% EtOAc in cyclohexane)