Piperazine → 1-Piperazinecarboxamide

Participants

Reaction Steps

Into a 3 liter, four necked round bottom flask fitted with mechanical stirring, dry nitrogen and a reflux condenser were charged 129.2 grams piperazine, 750 ml dichloromethane, 750 ml acetonitrile, and 6.1 grams dimethylaminopyridine. To this mixture was added portion-wise 222.2 g phthalic anhydride. Following the addition, the mixture was refluxed for 3 hours, at the end of which period no residual anhydride was present by infrared analysis. The solvent was decanted from the solid product precipitate.

Provenance & Evidence