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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1242238Generated: October 30, 2026

Ethanol → HCID 21938641, compound

https://huagongshe.com/reaction/1242238

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 numberUS07115662B2
Source datasetuspto-grants-2006_10
ORD IDord-47dd338c100f421da4305254c65aaa86
Source noteuspto-grants-2006_10