反应详情

温度

60 °C

To a solution of 3-benzyloxy-5-bromo-4-oxo-4H-pyran-2-carboxylic acid 3-chlorobenzylamide (1.50 g) in tetrahydrofuran (10 ml)-ethanol (10 ml) was added aminoacetaldehyde dimethyl acetal (0.73 ml) and the mixture was stirred at 60° C. for 1 hr. The solvent was evaporated and the residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:3–1:2) to give 3-benzyloxy-5-bromo-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridine-2-carboxylic acid 3-chlorobenzylamide (1.35 g).

1. customThe solvent was evaporated
2. customthe residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:3–1:2)