1-(2-bromo-4-chlorophenyl)-8-Chloro-5-(1-ethylpropyl)-2,3-dihydro-1H-imidazo[1,2-a]benzimidazole → 5-Chloro-2-[8-chloro-5-(1-ethylpropyl)-2,3-dihydro-1H-imidazo[1,2-a]benzimidazol-1-yl]benzonitrile

HRID 1398974Notes

Reaction equation

HRID 1398974 reaction equation
Br[C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[N:9]1[C:13]2=[N:14][C:15]3[C:20]([Cl:21])=[CH:19][CH:18]=[C:17]([CH:22]([CH2:25][CH3:26])[CH2:23][CH3:24])[C:16]=3[N:12]2[CH2:11][CH2:10]1.[Cu][C:28]#[N:29]>CN1CCCC1=O.O.C(OCC)(=O)C>[Cl:8][C:6]1[CH:5]=[CH:4][C:3]([N:9]2[C:13]3=[N:14][C:15]4[C:20]([Cl:21])=[CH:19][CH:18]=[C:17]([CH:22]([CH2:25][CH3:26])[CH2:23][CH3:24])[C:16]=4[N:12]3[CH2:11][CH2:10]2)=[C:2]([CH:7]=1)[C:28]#[N:29]

Participants

6

Reactant 2

HCID 577860361-(2-bromo-4-chlorophenyl)-8-Chloro-5-(1-ethylpropyl)-2,3-dihydro-1H-imidazo[1,2-a]benzimidazoleHCID 178418546HCID 178418546, compound

Product 1

HCID 577861665-Chloro-2-[8-chloro-5-(1-ethylpropyl)-2,3-dihydro-1H-imidazo[1,2-a]benzimidazol-1-yl]benzonitrile

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 13387N-methyl-2-pyrrolidoneSolvent

Conditions

Temperature
150 °C

Procedure

To a solution of 1-(2-bromo-4-chlorophenyl)-8-chloro-5-(1-ethylpropyl)-2,3-dihydro-1H-imidazo[1,2-a]benzimidazole (30.7 mg, 0.0677 mmol) in 1-methyl-2-pyrrolidone (0.5 mL) was added copper(I) cyanide (18.2 mg, 0.203 mmol). The reaction mixture was stirred at 150° C. for 6 hr. After cooling, the reaction mixture was diluted with water and ethyl acetate and the precipitate was removed by filtration. The filtrate was extracted with ethyl acetate (×3). The combined organic layer was washed with water, brine, dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a 0-15% ethyl acetate/n-hexane gradient mixture to give the title compound as an amorphous (18.7 mg, 0.468 mmol, 69%).

Workup

  1. temperatureAfter cooling
  2. customthe precipitate was removed by filtration
  3. extractionThe filtrate was extracted with ethyl acetate (×3)
  4. washThe combined organic layer was washed with water, brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by silica gel column chromatography
  9. washeluting with a 0-15% ethyl acetate/n-hexane gradient mixture

Sources & evidence

ORD record
ord-138c6d04f7404f4697766fd1c81260d6
Source dataset
uspto-grants-2014_12
Patent number
US08901141B2

Reaction notes

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