反应详情

温度

60 °C

At RT, 0.2 ml of water and 97 mg (1.22 mmol, 3.0 eq.) of sodium hydroxide were added to a suspension of 200 mg (0.41 mmol) of ethyl 4-({2-[4-(5-chloro-2-cyanophenyl)-5-methoxy-2-oxopyridin-1(2H)-yl]butanoyl}amino)benzoate (racemate) in 2.0 ml of ethanol. The reaction mixture was stirred at RT for 1 h and at an oil bath temperature of 60° C. for 6 h, allowed to stand at RT overnight and then added to aqueous hydrochloric acid (1N). After dilution with water a precipitate was formed which was filtered off, washed twice with water and dried under reduced pressure. The precipitate was then purified by flash chromatography (25 g of silica gel, mobile phase: dichloromethane→dichloromethane/methanol 50:1). Yield: 144 mg (38% of theory based on 0.82 mmol, since two crude product batches of the stated size were purified together)

1. waitto stand at RT overnight
2. filtrationwas filtered off
3. washwashed twice with water
4. customdried under reduced pressure
5. customThe precipitate was then purified by flash chromatography (25 g of silica gel, mobile phase: dichloromethane→dichloromethane/methanol 50:1)
6. customwere purified together)