反应详情

温度

60 °C

Sodium hydride (55%; 0.238 g) and 4-hydroxy-alpha-oxobenzeneacetic acid methyl ester (0.978 g) in dimethylformamide (12 mL) were stirred at room temperature for 30 minutes and then 2-chloro-1-(1-naphthalenyl)ethanone (1 g) in dimethylformamide (6 mL) was added. The reaction mixture was stirred at 60° C. overnight and worked up as in Example 20. The crude product (1.7 g) was purified by flash chromatography over silica gel (ethyl acetate-hexane-dichloromethane; 2.5:37.5:60) to afford of 0.277 g of 4-[2-(1 -naphthalenyl)-2-oxoethoxy]-alpha-oxobenzeneacetic acid methyl ester. Crystallization of the ester from ethyl acetate-hexane gave the analytical specimen, mp 99°-100.5° C.

1. customThe crude product (1.7 g) was purified by flash chromatography over silica gel (ethyl acetate-hexane-dichloromethane; 2.5:37.5:60)