5-Nitro-3',6'-dihydro-2'H-[2,4]bipyridinyl-1'-carboxylic acid tert-butyl ester → tert-Butyl 4-(5-aminopyridin-2-yl)piperidine-1-carboxylate

HRID 1043339Notes

Reaction equation

HRID 1043339 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH:12]=[C:11]([C:14]2[CH:19]=[CH:18][C:17]([N+:20]([O-])=O)=[CH:16][N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]>CO.[Pd]>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][CH:11]([C:14]2[CH:19]=[CH:18][C:17]([NH2:20])=[CH:16][N:15]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 1

HCID 591285695-Nitro-3',6'-dihydro-2'H-[2,4]bipyridinyl-1'-carboxylic acid tert-butyl ester

Product 1

HCID 59128562tert-Butyl 4-(5-aminopyridin-2-yl)piperidine-1-carboxylateYield 107.2%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A solution of 226 mg (0.740 mmol) 5-nitro-3′,6′-dihydro-2′H-[2,4′]bipyridinyl-1′-carboxylic acid tert-butyl ester (as prepared in the previous step) in 15 mL MeOH was treated with 110 mg 10% Pd/C (Degussa type E101-NE/W, Aldrich, 50% by weight water) and 1 atm H2 at room temperature for 18 h. The mixture was filtered through Celite, and the filter cake was washed with MeOH. Concentration afforded 220 mg (107%) of the title compound as a colorless glassy solid. Mass spectrum (ESI, m/z): Calcd. for C15H23N3O2, 278.2 (M+H). found 278.0.

Workup

  1. filtrationThe mixture was filtered through Celite
  2. washthe filter cake was washed with MeOH
  3. concentrationConcentration

Sources & evidence

ORD record
ord-43b9839a4f7d46c098720b967ba82dd1
Source dataset
uspto-grants-2013_10
Patent number
US08557847B2

Reaction notes

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