4-Methylmorpholine → HCID 68157891, compound

Participants

Reaction Steps

A mixture of N2-cyclobutyl-4-fluorobenzene-1,2-diamine (0.63 g, 3.5 mmol), (S)-2-tertbutoxycarbonylaminopropionic acid (0.73 g, 3.9 mmol), HOAt (0.53 g, 3.9 mmol), 4-methylmorpholine (0.85 mL, 7.7 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.75 g, 3.9 mmol) in DCM (12 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-cyclobutylamino-4-fluorophenylcarbamoyl)ethyl]carbamic acid tert-butyl ester (853 mg, 69%). LCMS (Method J): RT 3.54 min [M+H]+ 352.2.

Provenance & Evidence