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4-[(5-Bromo-3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester → 4-[(5-Cyano-3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

HRID 1827223
Notes
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Reaction equation

HRID 1827223 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([CH2:14][NH:15][C:16]2[C:21]([O:22][CH3:23])=[N:20][C:19](Br)=[CH:18][N:17]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[Cu](C#N)[C:26]#[N:27]>CS(C)=O.[OH-].[NH4+].O.ClCCl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([CH2:14][NH:15][C:16]2[C:21]([O:22][CH3:23])=[N:20][C:19]([C:26]#[N:27])=[CH:18][N:17]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 2

HCID 235773094-[(5-Bromo-3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl esterHCID 178418260HCID 178418260, compound

Product 1

HCID 235773114-[(5-Cyano-3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 4

HCID 679Dimethyl SulfoxideSolventHCID 962
Water
Solvent
HCID 6344DichloromethaneSolvent
HCID 14923Ammonium HydroxideSolvent

Conditions

Temperature
150 °C

Procedure

To 4-[(5-bromo-3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester (0.5 g, 0.00125 mol) in DMSO (10 mL), under nitrogen, was added copper cyanide (0.565 g, 0.00625 mol) and the mixture heated to 150° C. for 1.5 h. The reaction mixture was cooled to rt, diluted with a mixture of 20% ammonium hydroxide in water (50 mL) and dichloromethane (50 mL) and allowed to stir for 1 h. The organic layer was removed, dried over sodium sulfate, filtered and concentrated to an oil. The oil was chromatographed on silica using a gradient of 20–40% ethyl acetate/hexane to give the title compound as a foam. M.S.(M+1): 348.

Workup

  1. temperatureThe reaction mixture was cooled to rt
  2. customThe organic layer was removed
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated to an oil
  6. customThe oil was chromatographed on silica using a gradient of 20–40% ethyl acetate/hexane

Sources & evidence

ORD record
ord-a08c24176b4a405198fc816fee0e54ea
Source dataset
uspto-grants-2006_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07053089B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes