Diisopropylethylamine → HCID 130394530, compound

Participants

Reaction Steps

To (S)-2-((S)-3-(benzyloxy)-2-((tert-butoxycarbonyl)amino)propanamido)-3-(4-methoxyphenyl)propanoic acid (3.39 mmol assumed) and HATU (1.45 g, 3.82 mmol) in DMF (10 mL) at 0° C. was added (S)-2-amino-1-((R)-2-methyloxiran-2-yl)-3-phenylpropan-1-one TFA salt (1.05 g, 3.47 mmol). The mixture was stirred for 5 min to dissolved the solids and DIEA (2.41 mL, 13.88 mmol) was added. The reaction mixture was stirred at this temperature for 15 min then quenched with sodium bicarbonate (sat.), extracted with ethyl acetate (2×), dried with sodium sulfate, filtered, and concentrated to provide crude tert-butyl ((S)-3-(benzyloxy)-1-(((S)-3-(4-methoxyphenyl)-1-(((S)-1-((R)-2-methyloxiran-2-yl)-1-oxo-3-phenylpropan-2-yl)amino)-1-oxopropan-2-yl)amino)-1-oxopropan-2-yl)carbamate (quant.) as a yellow oil that was carried forward without further purification. MS (EI) for C37H45N3O8, found 660.4 (MH+).

Provenance & Evidence