Cyanogen Chloride → 1H-Imidazole-4,5-dicarbonitrile, 2-amino-

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Reaction Steps

Diaminomaleonitrile (26.2 g) was added in portions to a solution containing cyanogen chloride (14.9 g) in tetrahydrofuran (200 ml). The mixture was then warmed to room temperature and finally heated under reflux for 1 hour. The resulting brown solid was collected by filtration and washed with a solution of sodium acetate. The remaining solid was dissolved in a sodium bicarbonate solution and treated with charcoal, filtered and acidified to give 2-amino-4,5-dicyanoimidazole, m.p. 276°-278°.

Provenance & Evidence