Ammonia → HCID 12888760, compound

Participants

Reaction Steps

1-Methyl-3-(2,4-dinitroanilino)pyrazole-4-carbonitrile (2.88 g) was stirred in a mixture of 0.88 ammonia solution (60 ml), water (90 ml) and ethanol (60 ml) under reflux whilst a slow stream of hydrogen sulphide gas was bubbled through for 2 hours. The mixture was cooled, filtered and the residue crystallised from ethyl acetate-n-hexane to give the title compound m.p. 204° C.

Provenance & Evidence