N-bromobutanimide → 4-Bromomethyl-2-(4-trifluoromethyl-phenyl)-thiazole-5-carboxylic Acid Ethyl Ester

HRID 642286Notes

Reaction equation

HRID 642286 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]([C:11]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][CH:12]=2)=[N:8][C:7]=1[CH3:21])=[O:5])[CH3:2].[Br:22]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]([C:11]2[CH:16]=[CH:15][C:14]([C:17]([F:19])([F:20])[F:18])=[CH:13][CH:12]=2)=[N:8][C:7]=1[CH2:21][Br:22])=[O:5])[CH3:2]

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 27372104-Methyl-2-(4-trifluoromethyl-phenyl)-thiazole-5-carboxylic acid ethyl ester

Product 1

HCID 179517684-Bromomethyl-2-(4-trifluoromethyl-phenyl)-thiazole-5-carboxylic Acid Ethyl EsterYield 105.3%

Reagents, catalysts & solvents 2

HCID 7187Benzoyl PeroxideCatalystHCID 5943Carbon TetrachlorideSolvent

Procedure

A mixture of 4-methyl-2-(4-trifluoromethyl-phenyl)-thiazole-5-carboxylic acid ethyl ester (1.00 g, 3.18 mmol), N-bromosuccinimide (594 mg, 3.34 mol) and benzoyl peroxide (77 mg, 0.32 mmol) in carbon tetrachloride (15 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 to give the title compound as a yellow oil (1.32 g, product is 80% pure by 1H NMR, impurities are starting material and dibromonated compound); MS: (+) m/z 393.9, 395.9 (M+1, 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

Sources & evidence

ORD record
ord-792d3b6e93e1413aaf7a51154c174466
Source dataset
uspto-grants-2010_04
Patent number
US07696223B2

Reaction notes

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