反应详情

温度

80 °C

A solution of 19.1 g of 4-(4-methoxyphenyl)-pyrrolidin-2-one (100 mmol) in 200 ml of glacial acetic acid, 4.8 ml of water and 1.2 ml of concentrated sulfuric acid is combined with 3.44 g (19.55 mmol) of iodic acid and 8.64 g (70 mmol) of iodine and stirred at a bath temperature of 80° C. for 10 hours. Subsequently, the mixture is concentrated on a rotary evaporator up to onset of crystallization, cooled, the crystalline precipitate is suctioned off and recrystallized from ethyl acetate, thus obtaining 25.7 g (81% of theory) of 4-(3-iodo-4-methoxyphenyl)pyrrolidin-2-one, mp 158° C.

1. concentrationSubsequently, the mixture is concentrated on a rotary evaporator up
2. customto onset of crystallization
3. temperaturecooled
4. customrecrystallized from ethyl acetate