反应详情

温度

60 °C

A stirred mixture of 4-hydroxy-alpha-oxobenzeneacetic acid methyl ester (0.724 g) in dimethylformamide (10 mL) under argon was treated with 55% sodium hydride (0.175 g), stirred for 15 minutes and treated with the mesylate of 2-(4-phenylphenoxy)ethanol (1.4 g). The mixture was heated at 60° C. overnight and worked up as in Example 20. The crude dichloromethane extract was purified by HPLC (dichloromethane-hexane; 4:1) and the resulting solids were crystallized from dichloromethane-diethyl ether to provide 0.45 g of 4-[[2-[4-(1,1'-biphenyl)oxy]ethyl]oxy]-alpha-oxobenzeneacetic acid methyl ester as an 0.25 molar hydrate, mp 143°-145° C.

1. extractionThe crude dichloromethane extract
2. customwas purified by HPLC (dichloromethane-hexane; 4:1)
3. customthe resulting solids were crystallized from dichloromethane-diethyl ether