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50.2 g (0.35 mol) of 2,4-difluorobenzylamine and 37.1 g (0.35 mol) of benzaldehyde are dissolved in 140 ml of toluene and heated to reflux. The water produced is separated off using a water separator. The reaction is complete (GC check) after two hours. The solution is evaporated on a vacuum rotary evaporator. 78.9 g (97% of theory) of a slightly yellow liquid are obtained.

1. temperatureheated to reflux
2. customis separated off
3. customafter two hours
4. customThe solution is evaporated on a vacuum rotary evaporator
5. custom78.9 g (97% of theory) of a slightly yellow liquid are obtained