反应详情

Crude (S)-methyl 2-amino-3-(3-(benzyloxy)-4-methylphenyl)propanoate (TFA salt, 2.5 mmol) was dissolved in DMF (5 mL) and (S)-2-(2-morpholinoacetamido)propanoic acid (0.65 g, 3.0 mmol), HATU (1.43 g, 3.70 mmol), and DIEA (1.0 mL) were added at 0° C. with stirring. The reaction mixture was allowed to warm to ambient temperature and stirred for 3 h. EtOAc (100 mL) and water (100 mL) was added. The aqueous phase was extracted with EtOAc (30 mL×3) and the combined organic phases were washed with brine (50 mL×3), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash column chromatography on silica gel (DCM/MeOH=20:1) to afford (S)-Methyl 3-(3-(benzyloxy)-4-methylphenyl)-2-((S)-2-(2-morpholinoacetamido) propanamido)propanoate (1.2 g, 96% yield).

1. stirringstirred for 3 h
2. extractionThe aqueous phase was extracted with EtOAc (30 mL×3)
3. washthe combined organic phases were washed with brine (50 mL×3)
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated
6. customThe residue was purified by flash column chromatography on silica gel (DCM/MeOH=20:1)