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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1990912Generated: October 30, 2026

Hydrochloric Acid → tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate

https://huagongshe.com/reaction/1990912

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactant1-Boc-4-(4-Nitrophenyl)piperazineHCID 3380696—
CatalystPalladiumHCID 23938—
SolventMethanolHCID 887—
SolventDichloromethaneHCID 6344—
Producttert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylateHCID 1101130172%

Reaction Steps

1 equiv of 43 dissolved in methanol (anhydrous) and 10% of 10% Pd/C was added under a hydrogen atmosphere and allowed to stir overnight at room-temp. Reaction was filtered through a pad of celite and concentrated to give a blue/purple oil. The oil was brought up in DCM acidified using 1 M HCl and organic wash was removed. The aqueous was neutralized with sat'd sodium bicarbonate and washed 3 times with DCM, dried with sodium sulfate, filtered and concentrated and resulted in a pale red oil, 72% yield. MS (ES) 277.8 [MH+].

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07645754B2
Source datasetuspto-grants-2010_01
ORD IDord-77cb72ad2ba744e4ba8824cfb4e5d00d
Source noteuspto-grants-2010_01