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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2251173Generated: October 26, 2026

tert-Butyl piperazine-1-carboxylate → 4-(4-Cyano-2,3-difluoro-phenyl)-piperazine-1-carboxylic acid tert-butyl ester

https://huagongshe.com/reaction/2251173

Reaction equation

Participants

RoleNameHCIDCharge
Reactanttert-Butyl piperazine-1-carboxylateHCID 143452—
Reactant2,3,4-TrifluorobenzonitrileHCID 518936—
SolventDimethylacetamideHCID 31374—
Product4-(4-Cyano-2,3-difluoro-phenyl)-piperazine-1-carboxylic acid tert-butyl esterHCID 6884074575.4%

Reaction Conditions

Temperature80 °C

Reaction Steps

To a solution of N-Boc-Piperazine (0.65 g) in DMA (20 mL) was slowly added a solution of 2,3,4-trifluorobenzonitrile (0.49 g) in DMA (10 mL). The reaction mixture was stirred for 2 hours at 80° C. After such time the solvent was removed in vacuo and purified by column chromatography (SiO2) to yield the title compound as white solid (0.76 g).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07319099B2
Source datasetuspto-grants-2008_01
ORD IDord-4793609507b142b69187e9ab310ac2c8
Source noteuspto-grants-2008_01