N-Iodosuccinimide → 4-[(R)-1-(3,5-Dichloro-4-fluoro-phenyl)-5-iodo-3-methyl-2-oxo-2,3-dihydro-1H-imidazo[1,2-a]imidazol-3-ylmethyl]-benzonitrile

HRID 449157Notes

Reaction equation

HRID 449157 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:10]2[C:14](=[O:15])[C@:13]([CH2:17][C:18]3[CH:25]=[CH:24][C:21]([C:22]#[N:23])=[CH:20][CH:19]=3)([CH3:16])[N:12]3[CH:26]=[CH:27][N:28]=[C:11]23)[CH:5]=[C:6]([Cl:9])[C:7]=1[F:8].[Al].[I:30]N1C(=O)CCC1=O.C1(C)C=CC(S([O-])(=O)=O)=CC=1.[NH+]1C=CC=CC=1>C(Cl)Cl>[Cl:1][C:2]1[CH:3]=[C:4]([N:10]2[C:14](=[O:15])[C@:13]([CH2:17][C:18]3[CH:25]=[CH:24][C:21]([C:22]#[N:23])=[CH:20][CH:19]=3)([CH3:16])[N:12]3[C:26]([I:30])=[CH:27][N:28]=[C:11]23)[CH:5]=[C:6]([Cl:9])[C:7]=1[F:8]

Participants

6

Reactant 4

HCID 120273N-IodosuccinimideHCID 466102Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1)HCID 5359268AluminumHCID 584311004-[(R)-1-(3,5-Dichloro-4-fluoro-phenyl)-3-methyl-2-oxo-2,3-dihydro-1H-imidazo[1,2-a]imidazol-3-ylmethyl]-benzonitrile

Product 1

HCID 584308774-[(R)-1-(3,5-Dichloro-4-fluoro-phenyl)-5-iodo-3-methyl-2-oxo-2,3-dihydro-1H-imidazo[1,2-a]imidazol-3-ylmethyl]-benzonitrileYield 82.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A flask containing a solution of 4-[(R)-1-(3,5-dichloro-4-fluoro-phenyl)-3-methyl-2-oxo-2,3-dihydro-1H-imidazo[1,2-a]imidazol-3-ylmethyl]-benzonitrile (48.8 g, 117 mmol) in CH2Cl2 (900 mL) was covered with aluminum foil and partially submerged in an ice water bath. To this solution was added a solid mixture of N-iodosuccinimide (29.1 g, 129 mmol) and pyridinium p-toluenesulfonate (2.95 g, 11.7 mmol) in four separate portions over a 30 min period. The reaction was allowed to stir in the thawing ice bath for 1 h and then the bath was removed. Stirring was continued overnight. Saturated aqueous Na2S2O3 (300 mL) was added to the reaction and the mixture was transferred to a separatory funnel using CH2Cl2 (200 mL) and water (1 L). The layers were separated and the aqueous layer was further extracted with CH2Cl2 (2×500 mL) and EtOAc (500 mL). The combined organic layers were dried over MgSO4 and concentrated in vacuo to give a yellow oil. This oil was purified by flash chromatography on silica gel (0-2.5% EtOAc/toluene) to give 52 g of the title compound as a white solid, m/z 541.3 [M+H]+.

Workup

  1. custompartially submerged in an ice water bath
  2. additionTo this solution was added
  3. customseparate portions over a 30 min period
  4. customthe bath was removed
  5. stirringStirring
  6. waitwas continued overnight
  7. additionSaturated aqueous Na2S2O3 (300 mL) was added to the reaction
  8. customthe mixture was transferred to a separatory funnel
  9. customThe layers were separated
  10. extractionthe aqueous layer was further extracted with CH2Cl2 (2×500 mL) and EtOAc (500 mL)
  11. dry with materialThe combined organic layers were dried over MgSO4
  12. concentrationconcentrated in vacuo
  13. customto give a yellow oil
  14. customThis oil was purified by flash chromatography on silica gel (0-2.5% EtOAc/toluene)

Sources & evidence

ORD record
ord-42faf76c242e497c8677df5603cbef89
Source dataset
uspto-grants-2013_07
Patent number
US08481750B2

Reaction notes

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