Dibenz(b,f)azepine → Carbamazepine

Participants

Reaction Conditions

Reaction Steps

30 g iminostilbene are heated to 60° C. in 360 ml acetic acid and 50 ml ethanol, and 20 g 98% sodium cyanate is added within 1.5 hours at this temperature. After a short heating to 80° C., the mixture is further stirred at 60° C., and then cooled to 15° C., sucked off, washed with 20 l acetic acid and dried to yield 29.4 g (80.3% of theoretical) of carbamazepine, having a melting point of 189° C. to 192° C.

Provenance & Evidence