N-bromobutanimide → HCID 68426696, compound

HRID 642312Notes

Reaction equation

HRID 642312 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]([N:11]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[N:8][C:7]=1[CH3:25])=[O:5])[CH3:2].[Br:26]N1C(=O)CCC1=O>C(Cl)(Cl)(Cl)Cl.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]([N:11]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=2)=[N:8][C:7]=1[CH2:25][Br:26])=[O:5])[CH3:2]

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 68426137HCID 68426137, compound

Product 1

HCID 68426696HCID 68426696, compoundYield 82%

Reagents, catalysts & solvents 2

HCID 7187Benzoyl PeroxideCatalystHCID 5943Carbon TetrachlorideSolvent

Procedure

A mixture of 2-(tert-butoxycarbonyl-phenyl-amino)-4-methyl-thiazole-5-carboxylic acid ethyl ester (1.61 g, 4.45 mmol), N-bromosuccinimide (833 mg, 4.68 mol) and benzoyl peroxide (54 mg, 0.22 mmol) in carbon tetrachloride (30 mL) was refluxed for 16 h before it was cooled to room temperature and partitioned between dichloromethane and water. The organic layer was washed with saturated aqueous sodium bicarbonate solution, brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and hexanes to give the title compound as a yellow oil (1.61 g); MS: (+) m/z 341.0, 343.0 (M+1-Boc, 79Br/81Br).

Workup

  1. temperaturewas refluxed for 16 h before it
  2. custompartitioned between dichloromethane and water
  3. washThe organic layer was washed with saturated aqueous sodium bicarbonate solution, brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and hexanes

Sources & evidence

ORD record
ord-bb3b2b3ea3b64d7888abafc72312b1d6
Source dataset
uspto-grants-2010_04
Patent number
US07696223B2

Reaction notes

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