Phenacyl bromide → 2-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-4-phenyl-1H-imidazole

HRID 1352928Notes

Reaction equation

HRID 1352928 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[NH:20])[NH:9][C:10]2[CH:15]=[CH:14][C:13]([S:16]([CH3:19])(=[O:18])=[O:17])=[CH:12][CH:11]=2)=[CH:4][CH:3]=1.C(=O)(O)[O-].[Na+].Br[CH2:27][C:28]([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)=O>C(O)(C)C>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[N:9]([C:10]3[CH:15]=[CH:14][C:13]([S:16]([CH3:19])(=[O:17])=[O:18])=[CH:12][CH:11]=3)[CH:27]=[C:28]([C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)[N:20]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 6259Phenacyl bromideHCID 516892Sodium BicarbonateHCID 1785047964-chloro-N-[4-(methylsulfonyl)phenyl]benzenecarboximidamide

Product 1

HCID 102949212-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-4-phenyl-1H-imidazoleYield 57%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Conditions

Temperature
55 °C

Procedure

To a mixture of 4-chloro-N-[4-(methylsulfonyl)phenyl]benzenecarboximidamide (Example 1, Step 1) (400 mg, 1.29 mmol) and sodium bicarbonate (216 mg, 2.59 mmol) in isopropanol (25 mL), 2-bromoacetophenone (780 mg, 3.87 mmol) was added. After heating the reaction mixture at 55° C. for 20 hours, the solvent was removed. The residue was redissolved in methylene chloride and washed with aqueous sodium bicarbonate and water. The organic fractions were combined, dried over sodium sulfate, filtered and concentrated in vacuo. The crude product (1.2 g) was purified by chromatography on silica gel with toluene/ethyl acetate (75/25) to give pure 2-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-4-phenyl-1H-imidazole (300 mg, 57%) as a white solid: mp (DSC) 202° C. Anal. Calc'd. for C22H17N2SO2Cl: C, 63.78; H, 4.28; N, 6.76; S, 7.74. Found: C, 63.69; H, 4.11; N, 6.68; S, 7.65.

Workup

  1. additionwas added
  2. customthe solvent was removed
  3. dissolutionThe residue was redissolved in methylene chloride
  4. washwashed with aqueous sodium bicarbonate and water
  5. dry with materialdried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe crude product (1.2 g) was purified by chromatography on silica gel with toluene/ethyl acetate (75/25)

Sources & evidence

ORD record
ord-e623d41dbaf840c196ec1e45a2ea47dd
Source dataset
uspto-grants-2007_05
Patent number
US07220770B2

Reaction notes

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