反应详情

N-Methylmorpholine (1.09 g, 10.8 mmol) was added to a mixture of (S)-2-(2-morpholinoacetamido)propanoic acid (0.58 g, 2.7 mmol), (S)-benzyl 2-amino-4-phenylbutanoate (TFA salt, 1.03 g, 2.7 mmol) and HATU (1.13 g, 2.97 mmol) in dichloromethane (50 mL) at 0° C. The reaction mixture was allowed to warm to ambient temperature and stirred for 1 h. Water (50 mL) was added and the resulting mixture was extracted with dichloromethane (50 mL×3). The organic extracts were combined, dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash column chromatography on silica gel (dichloromethane/methanol=100:1 to 10:1) to afford (S)-benzyl 2-((S)-2-(2-morpholinoacetamido)propanamido)-4-phenylbutanoate (0.9 g, 71% yield).

1. extractionthe resulting mixture was extracted with dichloromethane (50 mL×3)
2. dry with materialdried over anhydrous sodium sulfate
3. concentrationconcentrated
4. customThe residue was purified by flash column chromatography on silica gel (dichloromethane/methanol=100:1 to 10:1)