N-bromobutanimide → tert-butyl ((1S,2S)-2-((3-bromo-5-(trifluoromethyl)pyrazin-2-yl)amino)cyclopentyl)carbamate

HRID 1750566Notes

Reaction equation

HRID 1750566 reaction equation
[F:1][C:2]([F:24])([F:23])[C:3]1[N:4]=[CH:5][C:6]([NH:9][C@H:10]2[CH2:14][CH2:13][CH2:12][C@@H:11]2[NH:15][C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[N:7][CH:8]=1.[Br:25]N1C(=O)CCC1=O>C(Cl)Cl.C(#N)C>[Br:25][C:5]1[C:6]([NH:9][C@H:10]2[CH2:14][CH2:13][CH2:12][C@@H:11]2[NH:15][C:16](=[O:22])[O:17][C:18]([CH3:20])([CH3:21])[CH3:19])=[N:7][CH:8]=[C:3]([C:2]([F:1])([F:23])[F:24])[N:4]=1

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 118308243HCID 118308243, compound

Product 1

HCID 118308064tert-butyl ((1S,2S)-2-((3-bromo-5-(trifluoromethyl)pyrazin-2-yl)amino)cyclopentyl)carbamate

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of tert-butyl N-[(1S,2S)-2-{[5-(trifluoromethyl)pyrazin-2-yl]amino}cyclopentyl]carbamate (11.61 g, 33.5 mmol) in DCM (70 ml) and acetonitrile (35 ml) at 0° C. under was added 1-bromopyrrolidine-2,5-dione (12.53 g, 70.4 mmol). The reaction was allowed to warm to room temperature and stirred for 20 hours. The mixture was concentrated in vacuo and then purified by column chromatography (silica, 0-50% ethyl acetate/petrol) to afford the title compound.

Workup

  1. concentrationThe mixture was concentrated in vacuo
  2. custompurified by column chromatography (silica, 0-50% ethyl acetate/petrol)

Sources & evidence

ORD record
ord-cf4b72b30f96402482257cf50df26173
Source dataset
uspto-grants-2015_10
Patent number
US09156829B2

Reaction notes

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