Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate → tert-Butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate

HRID 1853152Notes

Reaction equation

HRID 1853152 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:15]=[N:16][C:17]([N+:20]([O-])=O)=[CH:18][CH:19]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H][H]>C(O)C.C(OCC)(=O)C.[Pd]>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:15]=[N:16][C:17]([NH2:20])=[CH:18][CH:19]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 2

HCID 11243758Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylateHCID 178418361HCID 178418361, compound

Product 1

HCID 11737525tert-Butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylateYield 94%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 4-(6-nitro-pyridin-3-yl)-piperazine-1-carboxylic acid tert-butyl ester (3.40 g, 11.0 mmol) and 10% Pd—C (400 mg, 0.376 mmol) in ethanol (100 ml) and ethyl acetate (100 ml) is agitated under 1 atmosphere pressure of hydrogen overnight. The mixture is filtered and concentrated to give of 4-(6-amino-pyridin-3-yl)-piperazine-1-carboxylic acid tert-butyl ester (2.87 g, 94% yield). MS (ESI) m/z 278 (M+H)+

Workup

  1. filtrationThe mixture is filtered
  2. concentrationconcentrated

Sources & evidence

ORD record
ord-ed1bfaf46b0c4cf28d61c7819c9718b3
Source dataset
uspto-grants-2015_02
Patent number
US08962630B2

Reaction notes

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