2-Chloro-4'-fluoroacetophenone → 2-(4-chlorophenyl)-4-(4-fluorophenyl)-1-[4-(methylsulfonyl)phenyl]-1H-imidazole

HRID 1166316Notes

Reaction equation

HRID 1166316 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+].Cl[CH2:27][C:28]([C:30]1[CH:35]=[CH:34][C:33]([F:36])=[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][C:33]([F:36])=[CH:32][CH:31]=3)[N:20]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 1202482-Chloro-4'-fluoroacetophenoneHCID 516892Sodium BicarbonateHCID 1785047964-chloro-N-[4-(methylsulfonyl)phenyl]benzenecarboximidamide

Product 1

HCID 101373132-(4-chlorophenyl)-4-(4-fluorophenyl)-1-[4-(methylsulfonyl)phenyl]-1H-imidazoleYield 36.3%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Conditions

Temperature
82.5 °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-chloro-4′-fluoroacetophenone (670 mg, 3.87 mmol) was added. After heating the reaction mixture at 80-85° C. for 48 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 (800 mg) was purified by chromatography (silica gel, hexane/ethyl acetate, 1/1) to give 2-(4-chlorophenyl)-4-(4-fluorophenyl)-1-[4-(methylsulfonyl)phenyl]-1H-imidazole (200 mg, 36%) as a pale yellow solid: mp (DSC) 180° C. Anal. Calc'd. for C22H16N2SO2FCl: C, 61.90, H, 3.78, N, 6.56, S, 7.51. Found: C, 61.92, H, 3.74, N, 6.43, S, 7.62.

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 (800 mg) was purified by chromatography (silica gel, hexane/ethyl acetate, 1/1)

Sources & evidence

ORD record
ord-722abbd61d584315843a27cb084c1222
Source dataset
uspto-grants-2003_09
Patent number
US06613789B2

Reaction notes

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