4-Bromophenacyl bromide → 4-(4-Bromophenyl)-2-methyl-1,3-thiazole

HRID 2086671Notes

Reaction equation

HRID 2086671 reaction equation
Br[CH2:2][C:3]([C:5]1[CH:10]=[CH:9][C:8]([Br:11])=[CH:7][CH:6]=1)=O.[C:12]([NH2:15])(=[S:14])[CH3:13].[OH-].[Na+]>O1CCOCC1>[Br:11][C:8]1[CH:9]=[CH:10][C:5]([C:3]2[N:15]=[C:12]([CH3:13])[S:14][CH:2]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 74544-Bromophenacyl bromideHCID 14798Sodium HydroxideHCID 2723949Thioacetamide

Product 1

HCID 6201384-(4-Bromophenyl)-2-methyl-1,3-thiazoleYield 103.4%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Procedure

To a stirred solution of 2,4′-dibromoacetophenone (5 g, 18 mmol) in dioxane (180 ml) was added thioacetamide (6.76 g, 90 mmol), and the mixture was heated at reflux temperature for 8 hours. The reaction mixture was cooled down to room temperature, and made basic by addition of 2N NaOH aqueous solution. The whole was extracted with diethyl ether. The organic layer was washed with brine, dried over MgSO4, and concentrated in vacuo. The residue was purified by flash chromatography eluting with ethyl acetate-hexane (1:5) to give title compound (4.73 g, 99% yield).

Workup

  1. temperaturethe mixture was heated
  2. temperatureat reflux temperature for 8 hours
  3. extractionThe whole was extracted with diethyl ether
  4. washThe organic layer was washed with brine
  5. dry with materialdried over MgSO4
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by flash chromatography
  8. washeluting with ethyl acetate-hexane (1:5)

Sources & evidence

ORD record
ord-fcaee08cb6b9453895d9a42f1cf203e0
Source dataset
uspto-grants-2004_04
Patent number
US06727238B2

Reaction notes

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