4-Methylmorpholine → HCID 67773394, compound

Participants

Reaction Conditions

Reaction Steps

(S)-2-(Tert-butoxycarbonylamino)pentanoic acid (17.0 g, 78.25 mmol), which is commercially available, and EDC hydrochloride (18.00 g, 93.90 mmol) was mixed in DCM (300 mL). To the mixture was NMM (20.65 mL, 187.79 mmol) added. The mixture was cooled to 0° C. and azetidine (6.33 mL, 93.90 mmol) was added. The resultant mixture was stirred at 0° C. for 30 min. and at rt over night. The reaction mixture was washed with NaHCO3 (saturated, 2×300 mL) and brine (300 mL), filtered through a phase separator and concentrated under reduced pressure. The residue was purified via Biotage (gradient; DCM/iso-propanol, 99:1 to 90:10, KP-SIL 340 g column). The solvent was removed under reduced pressure to give the title compound (12.0 g, 60%). 1H NMR (400 MHz, CD3OD) δ 0.92, 1.20-1.76, 2.30, 3.89-4.26, 4.26-4.46, 5.16. LCMS (M+H)+: 257.

Provenance & Evidence