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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1403609Generated: November 2, 2026

Piperazine → HCID 70665208, compound

https://huagongshe.com/reaction/1403609

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPiperazineHCID 4837—
ReactantDiisopropylethylamineHCID 81531—
ReactantMethyl 3-chloro-2-(4-fluorophenyl)quinoxaline-6-carboxylateHCID 77231184—
SolventDimethyl SulfoxideHCID 679—
ProductHCID 70665208HCID 7066520874%

Reaction Conditions

Temperature80 °C

Reaction Steps

To a solution of methyl 3-chloro-2-(4-fluorophenyl)quinoxaline-6-carboxylate (632 mg, 2.00 mmol) in DMSO (10 ml) was added DIEA (516 mg, 3.99 mmol) and piperazine (688 mg, 7.99 mmol). The resulting solution was stirred for 3 hours at 80° C. and then quenched by the addition of water (100 ml). The solids were collected by filtration to afford methyl 2-(4-fluorophenyl)-3-(piperazin-1-yl)quinoxaline-6-carboxylate as a yellow solid (540 mg, 74%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08912188B2
Source datasetuspto-grants-2014_12
ORD IDord-0642b680592a4656ad7d66e1bfbc89c7
Source noteuspto-grants-2014_12