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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1636352Generated: October 30, 2026

Ethyl Acetoacetate → 3H-Pyrazol-3-one, 2-(4-chlorophenyl)-2,4-dihydro-5-methyl-

https://huagongshe.com/reaction/1636352

Reaction equation

Participants

RoleNameHCIDCharge
ReactantEthyl AcetoacetateHCID 8868—
Reactant(4-Chlorophenyl)hydrazineHCID 70624—
Product3H-Pyrazol-3-one, 2-(4-chlorophenyl)-2,4-dihydro-5-methyl-HCID 83055—

Reaction Steps

From the reaction of 4-chlorphenylhydrazine and ethylacetoacetate, 2-(4-chlorphenyl)-2,4-dihydro-5-methyl-3H-pyrazol-3-one is obtained. Subsequent reaction with 2-ethylaniline yields 2-(4chlorphenyl)-4-(2-ethylanilinomethylene)-2,4-dihydro-5-methyl-3H-pyrazol-3-one

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06034099
Source datasetuspto-grants-2000_03
ORD IDord-ccd6dc3fc05149abafc99721b02c8285
Source noteuspto-grants-2000_03