Reaction #1755445
ord-0de7c4e7f1254c798623acd97ef71758
Reaction equation
3-carboxy-1H-pyrazol-5-one
diethyl oxalacetate
hydrazine
→
3-(carboethoxy)-pyrazol-5-one
Reagents
None
Conditions
Detailed conditions
See reaction.notes.procedure_details.
Procedure
3-carboxy-1H-pyrazol-5-one, for example, can thus be prepared by reacting diethyl oxalacetate with hydrazine to yield 3-(carboethoxy)-pyrazol-5-one, followed by refluxing in aqueous HCl solution to hydrolyze the ethyl ester.