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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1636342Generated: October 30, 2026

4-Bromophenylhydrazine → 2-(4-bromophenyl)-2,4-dihydro-5-propyl-3H-Pyrazol-3-one

https://huagongshe.com/reaction/1636342

Reaction equation

Participants

RoleNameHCIDCharge
Reactant4-BromophenylhydrazineHCID 12158—
Reactant3-OxooctanoateHCID 17804644—
Product2-(4-bromophenyl)-2,4-dihydro-5-propyl-3H-Pyrazol-3-oneHCID 18761792—

Reaction Steps

From the reaction of 4-bromophenylhydrazine and ethylbutyrylacetate, 2-(4-bromphenyl)-2,4-dihydro-5-propyl-3H-pyrazol-3-one is obtained. Subsequent reaction with 2-ethylaniline yields 2-(4-bromophenyl)-4-(2-ethylanilinomethylene)-2,4-dihydro-5-propyl-3H-pyrazol-3-one, Mp.: 126.9° C.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06034099
Source datasetuspto-grants-2000_03
ORD IDord-42715bdf3e4c451eb377e55abc8398ba
Source noteuspto-grants-2000_03