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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 47412Generated: October 27, 2026

Trifluoroacetic acid → 7,9-dichloro-2,3,3a,4,5,9b-hexahydro-1H-cyclopenta[c]quinoline-4-carboxylic acid ethyl ester

https://huagongshe.com/reaction/47412

Reaction equation

Participants

RoleNameHCIDCharge
ReactantTrifluoroacetic acidHCID 6422—
ReactantCyclopenteneHCID 8882—
Reactant3,5-DichloroanilineHCID 12281—
Reactant2-KetobutyrateHCID 3593277—
SolventAcetonitrileHCID 6342—
Product7,9-dichloro-2,3,3a,4,5,9b-hexahydro-1H-cyclopenta[c]quinoline-4-carboxylic acid ethyl esterHCID 985800189%

Reaction Steps

Compound 59 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 cyclopentene 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-01fd5605296643c9b0e9d93cb0a60418
Source noteuspto-grants-2004_03