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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 5945Generated: October 26, 2026

Sulfuric Acid → isopropyl 5-fluoro-3-methyl-1H-indole-2-propanoate

https://huagongshe.com/reaction/5945

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSulfuric AcidHCID 1118—
Reactant4-Fluorophenylhydrazine hydrochlorideHCID 69981—
ReactantSodium BicarbonateHCID 516892—
ReactantEthyl 4-oxohexanoateHCID 12271528—
SolventIsopropanolHCID 3776—
Productisopropyl 5-fluoro-3-methyl-1H-indole-2-propanoateHCID 19794669—

Reaction Steps

A mixture of 1-(4-fluorophenyl)hydrazine hydrochloride (1.03 g), ethyl 4-oxo-hexanoate (1.0 g), 2-propanol (25 ml) and H2SO4 is refluxed under nitrogen for 9 hours. After cooling the mixture is poured into a aqueous solution of NaHCO3, extracted with AcOEt and evaporated to dryness to yield 1.45 g of isopropyl 5-fluoro-3-methyl-1H-indole-2-propanoate.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05246957
Source datasetuspto-grants-1993_09
ORD IDord-7032a768e4ff40098e40773662a0af2f
Source noteuspto-grants-1993_09