tert-butyl (3R,4R,5S)-4-(tert-butyldimethylsilyloxy)-5-methyl-1-(3-nitropyridin-4-yl)piperidin-3-ylcarbamate → tert-butyl (3R,4R,5S)-1-(3-aminopyridin-4-yl)-4-(tert-butyldimethylsilyloxy)-5-methylpiperidin-3-ylcarbamate

HRID 924500Notes

Reaction equation

HRID 924500 reaction equation
[Si:1]([O:8][C@@H:9]1[C@@H:14]([CH3:15])[CH2:13][N:12]([C:16]2[CH:21]=[CH:20][N:19]=[CH:18][C:17]=2[N+:22]([O-])=O)[CH2:11][C@H:10]1[NH:25][C:26](=[O:32])[O:27][C:28]([CH3:31])([CH3:30])[CH3:29])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[H][H]>CO.[Pd]>[NH2:22][C:17]1[CH:18]=[N:19][CH:20]=[CH:21][C:16]=1[N:12]1[CH2:13][C@H:14]([CH3:15])[C@@H:9]([O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])[C@H:10]([NH:25][C:26](=[O:32])[O:27][C:28]([CH3:31])([CH3:30])[CH3:29])[CH2:11]1

Participants

5

Reactant 2

HCID 59226604tert-butyl (3R,4R,5S)-4-(tert-butyldimethylsilyloxy)-5-methyl-1-(3-nitropyridin-4-yl)piperidin-3-ylcarbamateHCID 178418361HCID 178418361, compound

Product 1

HCID 59226553tert-butyl (3R,4R,5S)-1-(3-aminopyridin-4-yl)-4-(tert-butyldimethylsilyloxy)-5-methylpiperidin-3-ylcarbamateYield 99.7%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A mixture of tert-butyl [(3R,4R,5S)-4-{[tert-butyl(dimethyl)silyl]oxy}-5-methyl-1-(3-nitropyridin-4-yl)piperidin-3-yl]carbamate (13.4 g, 28.7 mmol) in MeOH (80 mL) was hydrogenated in the presence of 10% palladium on carbon (4.6 g) under 60 psi of hydrogen for 16 h. The reaction mixture was filtered through diatomaceous earth and the filtrate was concentrated under reduced pressure to give the sub-title compound (12.5 g, 99%). LCMS calc. for C22H41N4O3Si (M+H)+: m/z=437.3. Found: 437.4.

Workup

  1. filtrationThe reaction mixture was filtered through diatomaceous earth
  2. concentrationthe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-afeb4fe4ff5d408a9d42c5e8ea7f0e61
Source dataset
uspto-grants-2016_03
Patent number
US09278950B2

Reaction notes

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