2-{1-(Methoxycarbonyl)ethoxy}-3-nitropyridine → 3-Amino-2-{1-(methoxycarbonyl)ethoxy}pyridine

HRID 493957Notes

Reaction equation

HRID 493957 reaction equation
[CH3:1][O:2][C:3]([CH:5]([O:7][C:8]1[C:13]([N+:14]([O-])=O)=[CH:12][CH:11]=[CH:10][N:9]=1)[CH3:6])=[O:4]>[Pt]=O.C(O)C>[NH2:14][C:13]1[C:8]([O:7][CH:5]([C:3]([O:2][CH3:1])=[O:4])[CH3:6])=[N:9][CH:10]=[CH:11][CH:12]=1

Participants

4

Reactant 1

HCID 219335712-{1-(Methoxycarbonyl)ethoxy}-3-nitropyridine

Product 1

HCID 219335303-Amino-2-{1-(methoxycarbonyl)ethoxy}pyridineYield 78.7%

Reagents, catalysts & solvents 2

HCID 82844Platinum oxide (PtO)CatalystHCID 702EthanolSolvent

Procedure

A mixture of 1.7 g of 2-{1-(methoxycarbonyl)ethoxy}-3-nitropyridine, 102 mg of platinum oxide, and 7.5 ml of ethanol was stirred at room temperature under an atmosphere of hydrogen gas for 3.5 hours. The gas in the atmosphere on the reaction system was replaced with nitrogen gas, and the reaction mixture was filtered through Celite. The filtrate was concentrated. The residue was subjected to silica gel column chromatography to give 1.16 g of 3-amino-2-{1-(methoxycarbonyl)ethoxy}pyridine. 1H-NMR (CDCl3, 300 MHz) δ(ppm): 1.63 (d, 3H, J=6.8 Hz), 3.74 (s, 3H), 3.84 (bs, 2H), 5.38 (d, 1H, J=6.8 Hz), 6.72 (dd, 1H, J=7.7, 5.0 Hz), 6.90 (dd, 1H, J=7.7, 1.4 Hz), 7.48 (dd, 1H, J=5.0, 1.4 Hz).

Workup

  1. filtrationthe reaction mixture was filtered through Celite
  2. concentrationThe filtrate was concentrated

Sources & evidence

ORD record
ord-2d8d7b8517e443b7b63e420f80aa4fa2
Source dataset
uspto-grants-2009_05
Patent number
US07538072B2

Reaction notes

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