Iodine chloride → 3-Iodo-8-trifluoromethyl-6-(4-trifluoromethyl-phenyl)-imidazo[1,2-a]pyridine

HRID 2237885Notes

Reaction equation

HRID 2237885 reaction equation
[F:1][C:2]([F:23])([F:22])[C:3]1[C:4]2[N:5]([CH:19]=[CH:20][N:21]=2)[CH:6]=[C:7]([C:9]2[CH:14]=[CH:13][C:12]([C:15]([F:18])([F:17])[F:16])=[CH:11][CH:10]=2)[CH:8]=1.C([O-])(=O)C.[Na+].[I:29]Cl>C(O)(=O)C>[I:29][C:19]1[N:5]2[CH:6]=[C:7]([C:9]3[CH:14]=[CH:13][C:12]([C:15]([F:18])([F:17])[F:16])=[CH:11][CH:10]=3)[CH:8]=[C:3]([C:2]([F:1])([F:22])[F:23])[C:4]2=[N:21][CH:20]=1

Participants

5

Reactant 3

HCID 24640Iodine chlorideHCID 517045Sodium AcetateHCID 866080098-Trifluoromethyl-6-(4-trifluoromethyl-phenyl)-imidazo[1,2-a]pyridine

Product 1

HCID 866080083-Iodo-8-trifluoromethyl-6-(4-trifluoromethyl-phenyl)-imidazo[1,2-a]pyridineYield 72.7%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Conditions

Temperature
23 °C

Procedure

To a solution of 8-trifluoromethyl-6-(4-trifluoromethyl-phenyl)-imidazo[1,2-a]pyridine (1.36 g, 4.1 mmol) in 5 mL of acetic acid was added sodium acetate (0.51 g, 6.2 mmol) and a solution of iodine monochloride (2M, 2.5 mL, 5.0 mmol)-slightly exothermic. The reaction mixture was stirred for 30 min at 23° C., precipitate formed, then partitioned between 60 mL of water and 60 mL of EtOAc. The organic layer was washed with sat. NaHCO3, water, aq. sodium thiosulfate, water, then dried over Na2SO4, filtered and concentrated to give 1.36 g (72%) of an off-white solid. MS (ISP) 457.3 [(M+H)+].

Workup

  1. customprecipitate formed
  2. custompartitioned between 60 mL of water and 60 mL of EtOAc
  3. washThe organic layer was washed with sat. NaHCO3, water, aq. sodium thiosulfate, water
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-7197be043f9841299e51b1978da31b02
Source dataset
uspto-grants-2010_05
Patent number
US07718661B2

Reaction notes

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