N-Iodosuccinimide → (R)-1-(3,5-dichloro-phenyl)-5-iodo-3-methyl-3-(4-trifluoromethoxy-benzyl)-1H-imidazo[1,2-a]imidazol-2-one

HRID 2374786Notes

Reaction equation

HRID 2374786 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:9]2[C:13](=[O:14])[C@@:12]([CH3:27])([CH2:15][C:16]3[CH:21]=[CH:20][C:19]([O:22][C:23]([F:26])([F:25])[F:24])=[CH:18][CH:17]=3)[N:11]3[CH:28]=[CH:29][N:30]=[C:10]23)[CH:5]=[C:6]([Cl:8])[CH:7]=1.[I:31]N1C(=O)CCC1=O.C1(C)C=CC(S([O-])(=O)=O)=CC=1.[NH+]1C=CC=CC=1>C1COCC1.CCOC(C)=O>[Cl:8][C:6]1[CH:5]=[C:4]([N:9]2[C:13](=[O:14])[C@@:12]([CH3:27])([CH2:15][C:16]3[CH:17]=[CH:18][C:19]([O:22][C:23]([F:26])([F:24])[F:25])=[CH:20][CH:21]=3)[N:11]3[C:28]([I:31])=[CH:29][N:30]=[C:10]23)[CH:3]=[C:2]([Cl:1])[CH:7]=1

Participants

6

Reactant 3

HCID 120273N-IodosuccinimideHCID 466102Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1)HCID 11676886HCID 11676886, compound

Product 1

HCID 11585072(R)-1-(3,5-dichloro-phenyl)-5-iodo-3-methyl-3-(4-trifluoromethoxy-benzyl)-1H-imidazo[1,2-a]imidazol-2-oneYield 65%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of (R)-1-(3,5-dichloro-phenyl)-3-methyl-3-(4-trifluoromethoxy-benzyl)-1H-imidazo[1,2-a]imidazol-2-one (Example 1) (1.54 g, 3.38 mmol) in 30 mL of THF was treated with N-iodosuccinimide (0.846 g, 3.76 mmol) and pyridinium p-toluenesulfonate (0.086 g, 0.37 mmol). The mixture was stirred at room temperature for 17 h, then diluted with EtOAc and washed with 10% Na2S2O3 solution and water. The combined aqueous layers were extracted with 10 mL of EtOAc. The combined organic phases were washed with 25 mL of brine, dried over Na2SO4, filtered and concentrated. The crude orange oil was purified by silica gel chromatography to provide 1.27 g (65%) of (R)-1-(3,5-dichloro-phenyl)-5-iodo-3-methyl-3-(4-trifluoromethoxy-benzyl)-1H-imidazo[1,2-a]imidazol-2-one as an off-white oil (582.0, M+1).

Workup

  1. washwashed with 10% Na2S2O3 solution and water
  2. extractionThe combined aqueous layers were extracted with 10 mL of EtOAc
  3. washThe combined organic phases were washed with 25 mL of brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude orange oil was purified by silica gel chromatography

Sources & evidence

ORD record
ord-36b6db40464e485bb1747345eda101d2
Source dataset
uspto-grants-2008_12
Patent number
US07462637B2

Reaction notes

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