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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2087039Generated: October 30, 2026

Ethanol → HCID 21938641, compound

https://huagongshe.com/reaction/2087039

Reaction equation

Participants

RoleNameHCIDCharge
ReactantEthanolHCID 702—
ReactantPotassium HydroxideHCID 14797—
Reactant5-Ethyl-1,3-dihydro-2H-indol-2-oneHCID 10154189—
SolventWaterHCID 962—
ProductHCID 21938641HCID 21938641—

Reaction Steps

5-Ethyloxindole (˜54 g, ˜335 mmol), ethanol (750 ml), water (150 ml) and potassium hydroxide (65 g, 1.62 mol) are combined and heated at reflux for 3 days. The mixture is allowed to cool and then filtered through a bed of Celite. The filtrate is concentrated under reduced pressure, water is added and the pH adjusted to 6.5. The precipitate is filtered off, washed with water and dried in an oven overnight to yield 5-ethyl-2-aminophenylacetic acid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06727281B2
Source datasetuspto-grants-2004_04
ORD IDord-b6771f0f4b14433a819141083d528917
Source noteuspto-grants-2004_04