Diisopropylethylamine → HCID 122546895, compound

Participants

Reaction Conditions

Reaction Steps

To (S)-2-((tert-butoxycarbonyl)amino)-3-cyclopropylpropanoic acid (1.02 g, 4.44 mmol) was added (S)-2-amino-1-((R)-2-methyloxiran-2-yl)-3-phenylpropan-1-one TFA salt (1.34 g, 4.44 mmol), HATU (2.02 g, 5.33 mmol), and DMF (10 mL). The mixture was cooled to 0° C. and DIEA (3.09 mL, 17.8 mmol) was added. The reaction mixture was stirred at ambient temperature for 30 min then quenched with sodium bicarbonate (sat.), extracted with ethyl acetate (2×), dried with sodium sulfate, filtered, and concentrated. Purification by column chromatography (0-70% ethyl acetate/heptane) provided tert-butyl ((S)-3-cyclopropyl-1-(((S)-1-((R)-2-methyloxiran-2-yl)-1-oxo-3-phenylpropan-2-yl)amino)-1-oxopropan-2-yl)carbamate (1.33 g, 72%) as a colorless solid. MS (EI) for C23H32N2O5, found 417.3 (MH+).

Provenance & Evidence