反应详情

温度

60 °C

A stirred mixture of 4-hydroxy-alpha-oxobenzeneacetic acid methyl ester (1.01 g) in dimethylformamide (10 mL) under argon was treated with 55% sodium hydride (0.262 g), stirred for 15 minutes and treated with 2-(3-bromo-1-propenyl)naphthalene (1.7 g). The mixture was heated at 60° C. overnight and worked up as in Example 20. The material from dichloromethane extraction was purified by HPLC (dichloromethane-hexane; 4:1) and crystallized from dichloromethane-diethyl ether to provide 0.95 g of (E)-4-[[3-(2-naphthalenyl)-2-propenyl]oxy]-alpha-oxobenzeneacetic acid methyl ester, mp 100°-102° C.

1. extractionThe material from dichloromethane extraction
2. customwas purified by HPLC (dichloromethane-hexane; 4:1)
3. customcrystallized from dichloromethane-diethyl ether