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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 382487Generated: October 31, 2026

Ethanol → HCID 21938641, compound

https://huagongshe.com/reaction/382487

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 numberUS06310099B1
Source datasetuspto-grants-2001_10
ORD IDord-a28d412d8ad440fa9f509ea5eb63a2b3
Source noteuspto-grants-2001_10