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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 220836Generated: October 26, 2026

Hydrochloric Acid → HCID 45791623, compound

https://huagongshe.com/reaction/220836

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantTert-butyl 4-[2-(4-methylphenyl)-2-oxoethyl]piperazine-1-carboxylateHCID 56771152—
Solvent1,4-DioxaneHCID 31275—
ProductHCID 45791623HCID 4579162388%

Reaction Steps

4-(2-Oxo-2-p-tolyl-ethyl)-piperazine-1-carboxylic acid tert-butyl ester from Example E36.1 (661 mg, 2.08 mmol) was dissolved in 4M HCl solution in dioxan (25 ml) at 0° C. and the mixture was stirred for 45 min at room temperature. Solvents were concentrated in vacuo and azeotroped with diethyl ether to yield the title compound (536 mg, 88%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08202858B2
Source datasetuspto-grants-2012_06
ORD IDord-5bcf64eaae894f5cb5c351ee06821705
Source noteuspto-grants-2012_06