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

HRID 52300Notes

Reaction equation

HRID 52300 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 chromatographed 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. ##STR28##

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 chromatographed on silica gel with toluene/ethyl acetate (75/25)

Sources & evidence

ORD record
ord-9dce751c03714364a5bcc14d2b14267b
Source dataset
uspto-grants-1997_04
Patent number
US05616601

Reaction notes

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