2-Bromo-2'-acetonaphthone → 2-(4-chlorophenyl)-1-(4-(methylsulfonyl)phenyl]-4-(2-naphthyl)-1H-imidazole

HRID 52303

Reaction equation

HRID 52303 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:39]=[CH:38][C:37]2[C:32](=[CH:33][CH:34]=[CH:35][CH:36]=2)[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:39]=[CH:38][C:37]4[C:32](=[CH:33][CH:34]=[CH:35][CH:36]=4)[CH:31]=3)[N:20]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 691792-Bromo-2'-acetonaphthoneHCID 516892Sodium BicarbonateHCID 1785047964-chloro-N-[4-(methylsulfonyl)phenyl]benzenecarboximidamide

Product 1

HCID 221489462-(4-chlorophenyl)-1-(4-(methylsulfonyl)phenyl]-4-(2-naphthyl)-1H-imidazoleYield 54%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

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 (30 mL), 2-bromo-2'-acetonaphthone (970 mg, 3.89 mmol) was added. After heating the reaction mixture at 80°-85° 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 (silica gel, hexane/ethyl acetate, 6/4) to give 2-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-4-(2-naphthyl)-1H-imidazole (318 mg, 54%) as a pale yellow solid: mp 204°-206° C. Anal Calc'd. for C26H19N2SO2Cl: C, 68.04, H, 4.17, N, 6.10, S, 6.99. Found: C, 67.65, H, 4.19, N, 5.96, S, 7.10.

Workup

  1. additionwas added
  2. temperatureAfter heating the reaction mixture at 80°-85° C. for 20 hours
  3. customthe solvent was removed
  4. dissolutionThe residue was redissolved in methylene chloride
  5. washwashed with aqueous sodium bicarbonate and water
  6. dry with materialdried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe crude product (1.2 g) was chromatographed (silica gel, hexane/ethyl acetate, 6/4)

Sources & evidence

ORD record
ord-97d1a99becd14f46b6562dc20c7893bb
Source dataset
uspto-grants-1997_04
Patent number
US05616601

Linked notes

Loading…