4-Methylmorpholine → Ethyl 3-(2-{(tert-butoxycarbonyl)amino}acetylamino)propionate

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Reaction Steps

A solution of β-alanine ethyl ester hydrochloride salt (5) (3.07 g; 0.02 mmol), N-(tertbutoxycarbonyl)glycine (3.5 g; 0.02 mmol), DCCI (4.12 g; 0.02 mmol) and 4-methylmorpholine (2.2 ml) in dichloromethane (60 ml) was stirred overnight under argon atmosphere at ambient temperature. After filtration the residue was purified by flash chromatography eluting with dichloromethane/ethanol (96/4) to give ethyl 3-[(2-tertbutoxycarbonylaminoacetyl)amino]propanoate (6).

Provenance & Evidence