tert-Butyl 6-nitro-3',6'-dihydro-[3,4'-bipyridine]-1'(2'H)-carboxylate → tert-Butyl 4-(6-aminopyridin-3-yl)piperidine-1-carboxylate

HRID 1411786Notes

Reaction equation

HRID 1411786 reaction equation
[N+:1]([C:4]1[N:9]=[CH:8][C:7]([C:10]2[CH2:15][CH2:14][N:13]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:12][CH:11]=2)=[CH:6][CH:5]=1)([O-])=O>[Pd].CO>[NH2:1][C:4]1[N:9]=[CH:8][C:7]([CH: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 49840377tert-Butyl 6-nitro-3',6'-dihydro-[3,4'-bipyridine]-1'(2'H)-carboxylate

Product 1

HCID 49839963tert-Butyl 4-(6-aminopyridin-3-yl)piperidine-1-carboxylateYield 79.1%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A 500-mL round-bottomed flask was purged with nitrogen and charged with 200a (2.5 g, 8.2 mmol), 10% palladium on carbon (50% wet, 300 mg), and methanol (80 mL). The flask was evacuated, charged with hydrogen gas, and stirred at room temperature under hydrogen atmosphere for 12 h. The hydrogen was then evacuated and nitrogen was charged to the flask. The catalyst was removed by filtration through a pad of CELITE® and the filtrate was concentrated under reduced pressure to afford 200b (1.8 g, 78%) as a white solid. MS-ESI: [M+H]+ 278.1

Workup

  1. customA 500-mL round-bottomed flask was purged with nitrogen
  2. customThe flask was evacuated
  3. additioncharged with hydrogen gas
  4. customThe hydrogen was then evacuated
  5. additionnitrogen was charged to the flask
  6. customThe catalyst was removed by filtration through a pad of CELITE®
  7. concentrationthe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-4e9a74ab4e2346e89163035d8f7e5d56
Source dataset
uspto-grants-2014_12
Patent number
US08921353B2

Reaction notes

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