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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2184832Generated: October 27, 2026

Water → Ethyl 4-(2,5-dichlorobenzyl)piperazine-1-carboxylate

https://huagongshe.com/reaction/2184832

Reaction equation

Participants

RoleNameHCIDCharge
ReactantWaterHCID 962—
Reactant1-Piperazinecarboxylic acid, ethyl esterHCID 8431—
ReactantPotassium CarbonateHCID 11430—
Reactant2,5-Dichlorobenzyl chlorideHCID 75976—
SolventDimethylformamideHCID 6228—
ProductEthyl 4-(2,5-dichlorobenzyl)piperazine-1-carboxylateHCID 2245812363%

Reaction Steps

2,5-Dichlorobenzyl chloride (2.01 g) was added to a mixture of 1.94 g of 1-ethoxycarbonylpiperazine and 3.45 g of anhydrous potassium carbonate in 20 ml of N,N-dimethylformamide stirred at room temperature in nitrogen atmosphere. After 24 h of stirring at the same temperature, the reaction mixture was poured into water and extracted with ethyl acetate. The organic phase, which was dried on anhydrous Na2SO4, was evaporated to dryness under vacuum. The oily residue was purified via flash chromatography (petrolium ether-ethyl acetate 85:15) giving 2 g (63%) of the title compound.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06399614B1
Source datasetuspto-grants-2002_06
ORD IDord-4d42814bec4e48b4b2a0f94eaea3083e
Source noteuspto-grants-2002_06