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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1855721Generated: October 29, 2026

Water → HCID 23347803, compound

https://huagongshe.com/reaction/1855721

Reaction equation

Participants

RoleNameHCIDCharge
ReactantWaterHCID 962—
Reactantp-Toluenesulfonic acidHCID 6101—
ReactantP-AnisidineHCID 7732—
ReactantEthyl 1-methyl-alpha-oxo-1H-pyrrole-2-acetateHCID 89094—
SolventTolueneHCID 1140—
ProductHCID 23347803HCID 2334780358%

Reaction Steps

To a solution of 4.0 g ethyl 1-methylpyrrole-2-glyoxylate and 2.96 g p-anisidine in 20 ml toluene is added 24 mg p-toluenesulfonic acid. Heating at reflux for 4 days with water being removed with a Dean-Stark trap is followed by washing successively with aqueous hydrochloric acid, aqueous sodium bicarbonate and brine. After drying, evaporation of the solvent affords a dark solid. Recrystallization from isopropanol gives a 58% yield of ethyl α-(4-methoxyphenylimino)-1-methylpyrrole-2-acetate, m.p. 83°-85° C.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04216150
Source datasetuspto-grants-1980_08
ORD IDord-65b02630b98344b3b014bd51f488f160
Source noteuspto-grants-1980_08