反应详情

Boil 31.5 g of 1-benzyl-2-(α-ethoxycarbonyl-3,4-dimethoxybenzylidene)pyrrolidine under reflux with 75 ml of conc. hydrochloric acid until carbon dioxide ceases to evolve. After cooling, alkalize the thus-prepared reaction mixture with sodium hydroxide solution. Recrystallize the formed precipitate from ethanol to obtain a yield [11.3 g (44% of theory)] of title compound (m.p. 105°).

1. temperatureAfter cooling
2. customRecrystallize the formed precipitate from ethanol
3. customto obtain