反应详情

温度

150 °C

A mixture of 32.9 g of 3-amino-4-(2-hydroxypropylamino)quinoline in 100 ml of triethyl orthoformate and 10 drops of formic acid was heated at 150° C. for two hours. The mixture was evaporated under vacuum, then 200 ml of water was added and the pH was adjusted to pH 2 to 3 with concentrated hydrochloric acid. The solution was basified with ammonium hydroxide, then with 50 percent sodium hydroxide solution. An oily product eventually solidified and was separated by filtration. Recrystallization from a mixture of hexane and dichloromethane gave an off-white solid 1-(2-hydroxypropyl)-1H-imidazo[4,5-c]quinoline, m.p. 171° C.

1. customThe mixture was evaporated under vacuum
2. addition200 ml of water was added
3. customwas separated by filtration
4. customRecrystallization
5. additionfrom a mixture of hexane and dichloromethane