反应详情

温度

90 °C

A suspension of methyl 4-methoxy-3-oxo-2-(phenylhydrazono)butanoate (25.03 g) in dimethylformamide dimethylacetal (120 mL) was stirred at 90° C. for 1 hr. The mixture was allowed to cool to room temperature, and stirred for 1 hr. The precipitate was collected by filtration, washed successively with diethyl ether and hexane, and dried to give the title compound (24.7 g) as pale-yellow crystals.

1. temperatureto cool to room temperature
2. stirringstirred for 1 hr
3. filtrationThe precipitate was collected by filtration
4. washwashed successively with diethyl ether and hexane
5. customdried