反应详情

温度

12.5 °C

In a reaction vessel, 100 gm methylphenidate, 1000 ml isopropyl alcohol were mixed at 30 to 35° C., cool the mixture to 10 to 15° C. To this mixture Isopropanol hydrochloride solution (18-20% HCl (dry) in isopropyl alcohol) was added by maintaining the reaction mass below 15° C. This was maintained for about 5 hours at 30° C., cooled to 10° C. and filtered to isolate methylphenidate hydrochloride. The precipitate was washed with isopropyl alcohol and dried at 60 to 70° C.

1. temperatureby maintaining the reaction mass below 15° C
2. temperatureThis was maintained for about 5 hours at 30° C.
3. temperaturecooled to 10° C.
4. filtrationfiltered