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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 47361Generated: October 27, 2026

Trifluoroacetic acid → 7,9-dichloro-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid ethyl ester

https://huagongshe.com/reaction/47361

Reaction equation

Participants

RoleNameHCIDCharge
ReactantTrifluoroacetic acidHCID 6422—
ReactantCyclopentadieneHCID 7612—
Reactant3,5-DichloroanilineHCID 12281—
Reactant2-KetobutyrateHCID 3593277—
SolventAcetonitrileHCID 6342—
Product7,9-dichloro-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid ethyl esterHCID 988322589%

Reaction Steps

Compound 1 was prepared in a yield of 89% by the basic process from 5.0 mmol 3,5-dichloroaniline, 5.5 mmol ethylglyoxalate solution (50% toluene), 15.0 mmol cyclopentadiene and 5.0 mmol trifluoroacetic acid in 30.0 ml acetonitrile.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06699877B2
Source datasetuspto-grants-2004_03
ORD IDord-c93fb06d75a54a20946d718092cdbc12
Source noteuspto-grants-2004_03