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

HRID 1024065Notes

Reaction equation

HRID 1024065 reaction equation
[N+:1]([C:4]1[N:9]=[CH:8][C:7]([N:10]2[CH2:15][CH2:14][N:13]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:12][CH2:11]2)=[CH:6][CH:5]=1)([O-])=O>[Pd].C(O)C>[NH2:1][C:4]1[N:9]=[CH:8][C:7]([N:10]2[CH2:15][CH2:14][N:13]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:12][CH2:11]2)=[CH:6][CH:5]=1

Participants

4

Reactant 1

HCID 11243758Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate

Product 1

HCID 11737525tert-Butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylateYield 97%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 702EthanolSolvent

Procedure

A 500-mL bottle was purged with nitrogen and charged with 115a (3.1 g, 10 mmol), 10% palladium on carbon (50% wet, 1.0 g) and ethanol (100 mL). It was evacuated, charged with hydrogen gas, and stirred for 16 h at room temperature. The hydrogen was then evacuated and nitrogen was charged into the bottle. The catalyst was removed by filtration through a pad of Celite and the filtrate concentrated under reduced pressure to afford 115b (2.7 g, 97%). MS: [M+H]+ 279

Workup

  1. customA 500-mL bottle was purged with nitrogen
  2. customIt was evacuated
  3. additioncharged with hydrogen gas
  4. customThe hydrogen was then evacuated
  5. additionnitrogen was charged into the bottle
  6. customThe catalyst was removed by filtration through a pad of Celite
  7. concentrationthe filtrate concentrated under reduced pressure

Sources & evidence

ORD record
ord-312ebe17f5e846cb8f6bd724daabef44
Source dataset
uspto-grants-2014_05
Patent number
US08722676B2

Reaction notes

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