反应详情

DMAP (4-dimethylaminopyridine) (17.0 mg, 1.40 mmol) and DCC (1,3-dicyclohexylcarbodiimide)(86.2 mg, 4.19 mmol) were added to a solution of 3,5-dimethylphenylacetic acid (500 mg, 2.79 mmol) in dry THF (50 ml) were added. The mixture was stirred at rt for 30 min and then methyl ester of L-Phenylalanine (461 mg, 2.79 mmol) was added. After 48 h at rt. the crude mixture was filtered over celite and the solvent was removed under reduced pressure. The product was purified by flash chromatography (hexane/ethyl acetate 2:1) to afford (S) methyl 2-[2-(3,5-dimethylphenyl)acetamido]-3-phenyl-propanoate as white solid (70% c.y.).

1. additionwere added
2. waitAfter 48 h at rt
3. filtrationthe crude mixture was filtered over celite
4. customthe solvent was removed under reduced pressure
5. customThe product was purified by flash chromatography (hexane/ethyl acetate 2:1)