Hydrazine hydrate (1:1) → HCID 178469928, compound

Participants

Reaction Steps

To a solution of ethyl (ethoxymethylene)cyanoacetate (10 g) in ethanol (100 ml), was added hydrazine monohydrate (2.87 ml), and the resulted mixture was refluxed for 12 h. The reaction mixture was evaporated under reduced pressure followed by addition of ether (50 ml), and 3-amino-4-ethoxycarbonylpyrazole was obtained as pale yellow crystals (7.68 g, yield 84%).

Provenance & Evidence