Semicarbazide hydrochloride → HCID 354307, compound

Participants

Reaction Steps

To a mixture of semicarbazide hydrochloride (11.2 g, 0.1 mol), water (200 ml) and sodium hydroxide (4.0 g, 0.1 mol) cooled in an ice-bath was added dropwise tetracyanoethylene (12.8 g, 0.1 mol). The reaction mixture was warmed to room temperature, stirred for 1.5 hours and then allowed to stand for 24 hours. The white precipitate which formed during the course of the reaction was collected by filtration and washed with water to afford 15.6 g (89%) of 3-cyano-4-cyano-5-amino-1H-pyrazole-1-carboxamide as a white solid, m.p. 225° C. (dec.) when dried at 85° C. in high vacuum.

Provenance & Evidence