反应详情

A solution of 4-(1-methyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester hydrochloride (52 mg, 0.16 mmol), 2-bromo-5-methoxybenzoic acid (45 mg, 0.19 mmol), DIEA (140 μL, 0.80 mmol) and HBTU (85 mg, 0.22 mmol) in DMF (3 mL) was stirred at room temperature for 18 hr. The mixture was concentrated, the residue was dissolved in ethyl acetate (15 mL), was washed with 0.5 N HCl (1×5 mL), sat. NaHCO3 (1×5 mL), brine (1×5 mL) and was dried (MgSO4). The residue obtained upon evaporation (85 mg) was chromatographed on 25 g of silica gel, eluting with ethyl acetate to give N-[(2-bromo-5-methoxyphenyl)carbonyl]-4-(1-methyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester (54 mg, 68%). HRMS: Obs. Mass 499.0872. Calcd. Mass 15 499.0869 (M+H)

1. concentrationThe mixture was concentrated
2. dissolutionthe residue was dissolved in ethyl acetate (15 mL)
3. washwas washed with 0.5 N HCl (1×5 mL), sat. NaHCO3 (1×5 mL), brine (1×5 mL)
4. dry with materialwas dried (MgSO4)
5. customThe residue obtained upon evaporation (85 mg)
6. customwas chromatographed on 25 g of silica gel
7. washeluting with ethyl acetate