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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2372078Generated: October 30, 2026

Hydrochloric Acid → 5-Amino-1-cyclopropyl-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

https://huagongshe.com/reaction/2372078

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantEthyl 5-amino-1-cyclopropyl-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylateHCID 14127986—
SolventEthanolHCID 702—
Product5-Amino-1-cyclopropyl-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acidHCID 1391094796.1%

Reaction Steps

A solution of 0.5 g (1.5 mmoles) of ethyl 5-amino-1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylate, 5 ml of 6.0M hydrochloric acid and 5 ml of ethanol was heated at reflux for two hours. The solvent was removed in vacuo to give 430 mg of the title compound, mp 269-271° C.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05097032
Source datasetuspto-grants-1992_03
ORD IDord-7f26326986da468fab5b72bf07b13a82
Source noteuspto-grants-1992_03