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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 47363Generated: October 25, 2026

Trifluoroacetic acid → 8-chloro-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid ethyl ester

https://huagongshe.com/reaction/47363

Reaction equation

Participants

RoleNameHCIDCharge
ReactantTrifluoroacetic acidHCID 6422—
ReactantCyclopentadieneHCID 7612—
Reactant4-ChloroanilineHCID 7812—
Reactant2-KetobutyrateHCID 3593277—
SolventAcetonitrileHCID 6342—
Product8-chloro-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid ethyl esterHCID 996544989%

Reaction Steps

Compound 3 was prepared in a yield of 89% by the basic process from 5.0 mmol 4-chloroaniline, 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-0a43b64858bc4a909c3d85b6456cc7da
Source noteuspto-grants-2004_03