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N,N'-Dimethylethylenediamine → tert-butyl N-[(3S)-1-[1-methyl-5-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]-2-oxo-3-pyridyl]-3-piperidyl]carbamate

HRID 57947
Notes
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Reaction equation

HRID 57947 reaction equation
[CH3:1][C:2]1[N:7]=[C:6]([C:8]2[N:13]=[CH:12][C:11]3[CH:14]=[N:15][NH:16][C:10]=3[CH:9]=2)[CH:5]=[N:4][CH:3]=1.Br[C:18]1[CH:19]=[C:20]([N:26]2[CH2:31][CH2:30][CH2:29][C@H:28]([NH:32][C:33](=[O:39])[O:34][C:35]([CH3:38])([CH3:37])[CH3:36])[CH2:27]2)[C:21](=[O:25])[N:22]([CH3:24])[CH:23]=1.CNCCNC.C(=O)([O-])[O-].[K+].[K+]>O1CCOCC1.[Cu](I)I>[CH3:24][N:22]1[CH:23]=[C:18]([N:16]2[C:10]3[CH:9]=[C:8]([C:6]4[CH:5]=[N:4][CH:3]=[C:2]([CH3:1])[N:7]=4)[N:13]=[CH:12][C:11]=3[CH:14]=[N:15]2)[CH:19]=[C:20]([N:26]2[CH2:31][CH2:30][CH2:29][C@H:28]([NH:32][C:33](=[O:39])[O:34][C:35]([CH3:36])([CH3:38])[CH3:37])[CH2:27]2)[C:21]1=[O:25]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 8070N,N'-DimethylethylenediamineHCID 11430Potassium CarbonateHCID 867070806-(6-methylpyrazin-2-yl)-1H-pyrazolo[4,3-c]pyridineHCID 86707131tert-butyl N-[(3S)-1-(5-bromo-1-methyl-2-oxo-3-pyridyl)-3-piperidyl]carbamate

Product 1

HCID 86707132tert-butyl N-[(3S)-1-[1-methyl-5-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]-2-oxo-3-pyridyl]-3-piperidyl]carbamate
Yield 45%

Reagents, catalysts & solvents 2

HCID 83717Copper iodideCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 6-(6-methylpyrazin-2-yl)-1H-pyrazolo[4,3-c]pyridine (0.49711 mmol; 105 mg), tert-butyl N-[(3S)-1-(5-bromo-1-methyl-2-oxo-3-pyridyl)-3-piperidyl]carbamate (0.59653 mmol; 230.4 mg), N,N′-Dimethylethylenediamine (0.049711 mmol; 4.382 mg; 0.00495 mL), copper iodide (0.49711 mmol; 95.629 mg), and potassium carbonate (0.99422 mmol; 138.79 mg) in 1,4-Dioxane (10 mL) was purged with Argon, then sealed and stirred at 100° C. overnight. The mixture was cooled to room temperature, and then filtered through Celite. The filtrate was concentrated; the residue was purified on silica eluted with 0 to 6% MeOH in DCM to afford tert-butyl N-[(3S)-1-[1-methyl-5-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]-2-oxo-3-pyridyl]-3-piperidyl]carbamate (116. mg, 45%).

Workup

  1. customwas purged with Argon
  2. customsealed
  3. temperatureThe mixture was cooled to room temperature
  4. filtrationfiltered through Celite
  5. concentrationThe filtrate was concentrated
  6. customthe residue was purified on silica
  7. washeluted with 0 to 6% MeOH in DCM

Sources & evidence

ORD record
ord-43239200cc0645149641b680401ddd79
Source dataset
uspto-grants-2016_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09434725B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes